Cadillac 12646387 Chain Assembly, Tmg

Some of the timing system can be quite difficult to manipulate and it is very easy to cause further damage to the engine if any wrong step is taken, thus it is highly recommended that only those who have considerable experience in such repairs attempt it; in any case, they should consult a professional. Recheck all work and make sure all are right before start the engine. Special tools are required to lock the camshafts on each cylinder head into position, with two designs for the sprockets and chains: The first models, from 2005 to mid-2007, employ Design 1, which involves using camshaft locking tools EN-46105-1 and EN-46105-2, while the later ones, from mid-2007 to 2014, use the tools EN-48383-1, EN-48383-2, and EN-48383-3 and comes with 'inverted tooth' chains for less First, you have to take off the timing chain cover and for models of 2005 and half of 2007, rotate the crankshaft to the position with the mark on the oil pump housing vertical in the nine o'clock position while the flat backlash on the ridge of each camshaft on the right-hand cylinder head faces upwards. Attention should be paid to the installation of the special tools to the camshafts, then unscrew the fixing bolts for the timing chain tensioner for the right-side cylinder head and, having removed it along with the gasket, carefully put it aside. Move on to the removal of the right side cylinder head timing chain guides and the chain then do the same thing on the left side of the cylinder head. If required, one can take off the idler sprockets and locate the position of the camshaft sprockets and the camshaft before taking off the sprocket bolt. As for the mid 2007 and onward models, there is a similar process that must be carried out, but the crankshaft comes to a specific position and proper locking tools used. Check the timing chain cover for damage, scrub all components and look for such signs of wear or damage as on guides and sprockets. Remove tension from the tensioners and make sure that they are to be kept in a compact mode. When positioning of the crankshaft sprocket, woodruff key should be fitted with the timing marks visible and aligned before fitting the timing chains and the guides with the bolts tightened to the stipulated torque. Once more tighten all the timing marks appropriately, briefly turn the crankshaft to check for drag-which will signify a problem-before unlocking the tools.

The timing system is detailed and should not be performed when there is any sort of doubt on the matter; major engine damage can occur if this procedure is ruined, so only professionals should undertake this task. Start by removing the black negative terminal on the battery, and flush out the coolant. Disconnect the drive belts, cooling tank, coolant manifold, crankshaft balancer, vacuum pump and shift the 'AC' compressor unit from its place but not parting the lines. Then remove the oil pan and oil pump and finally, take of the starter. Place the number one piston at TDC on compression stroke, remove electrical connectors to the camshaft position sensor and actuator magnet, also remove the sensor and harness bolts. Loosen and then remove all the timing chain cover bolts allowing you to separate the timing chain cover from the block, best practice will be to sort the timing cover bolts in accordance to their length and size. The chain for additional mass, tensioner, and sprocket have to be successfully unbolted and the timing mark has to be ideally synchronized to proceed further. After the timing marks are properly positioned, and the timing chain has been removed you should not rotate the camshaft or crankshaft until the timing chain is replaced. Take off the solenoid valve from the upper sprocket assembly, dispose of it and next to that unbolt the actuator from the camshaft, take off the actuator assembly with the chain inclusive. Check out the timing chain tensioner and sprockets for wears and or damages, if so indicted, loosen the bolt holding the sprocket onto the crankshaft. During timing chain installation, replace the chains in sets with the camshaft and crankshafts sprockets, also, make sure that all the prior RTV gasket material is cleaned off. Slot the crankshaft sprocket with the Woodruff key and place it on the crankshaft; wind the new chain around the camshaft sprocket in a manner that the markings are in the right orientation. Ensure that the timing chain does not hang outside the engine block, install the new camshaft position actuator valve and tighten that bolt, apply force on the timing chain tensioner to compress it and then fit it. Turning the crankshaft with your fingers, two times clockwise and anti-clockwise, you should feel some kind of tightness, then install the oil pump. Before tightening the bolts, clean all the sealing surfaces of the timing chain cover, apply some RTV sealant and finally fit the cover loosely before you torque the bolts according to the proper sequences. Replace with a new crankshaft oil seal and carry out the operation in a sequence which is opposite to the one that has been illustrated. Last but not least, top up the cooling system and engine oil as well as the engine oil filter, start the engine and look fer leakages.

The use of timing system is quite delicate and if an error is made on the same, there will be severe damages to the engine, thus, it is advisable that, only professionals try this process and in case there is any doubt, one should consult an expert. Start with the removal of the first end terminal of the battery then empty the cooling system and the engine oil. For 5.3L and 6.2L models, the oil pan, vacuum pump and coolant manifold need to be removed while on the other hand the AC compressor needs to be held in place while the lines do not need to be disconnected. On 6.0L models, some of the crops include; If equipped, disconnect the wiring from the camshaft position sensor and actuator magnet, remove the water pump, and take off the crankshaft balancer. The timing chain cover mounting bolts must be removed, care being taken not to mar the cover, and the oil pump must be detached. Force the timing chain tensioner towards the chain until a special tool or a 3 mm drill bit can be inserted, then turn the crankshaft until you have the timing marks lined up at twelve and six but do not or turn the camshaft or crankshaft until the chain is back into its position. After that, eliminate the solenoid valve that was attached to the upper sprocket assembly, and dispose of it Later, unbolt, the actuator from the camshaft and exhaust the actuator assembly with the chain as well. Check the wear condition and conditions of timing chain tensioner, camshaft and crankshaft sprockets and in case where the crankshaft sprocket has to be removed from the crank shaft do it gently. Timing chains should be replaced at one time with the camshaft and crankshaft sprockets; gasket material should be cleaned off the cover and engine block. Check the position of the crankshaft sprocket in regard to the Woodruff key and place it on the crankshaft but do not hammer it. New chain place the new chain over the camshaft sprocket and make sure that the chain marks are lined correctly and no part of the chain is out of the engine block. Check the new camshaft position actuator valve snugly and compress the timing chain tensioner then install it and rotate the crank shaft manually to as much as possible for resistance. Bolt on the oil pump, perform cleaning of sealing surfaces, apply RTV on sealing surfaces, tighten this loosely with gasket and use a cover aligner tool to rightly align the timing chain cover. Last, fit a new crankshaft oil seal, and follow the reverse procedure to that of the removal part for the rest of the fitting process; refill the cooling and engine oil, replace the engine oil filter, and look for leaks after the vehicle has been run for some time.

To remove the timing chain cover, you need to first detach the negative cable from the battery and drain all the coolant. Afterwards, take out cooling fan, water pump, drive belt pulley and vibration damper. Then remove crankshaft position sensor and wiring harness nut. Remove oil pan then disconnect wiring harness clips from front cover. Remove crankshaft position sensor and camshaft position sensor with its jumper wiring harness. Afterward, remove the cover bolts and separate timing chain cover from block. Remove crankshaft position sensor reluctor ring and check timing chain free play. When needed replace the chain as well as sprockets. Be sure to align sprocket timing marks as well as release timing chain tensioner. To install timing chain cover clean engine block sealing surfaces then line up keyway on crankshaft sprocket. Press sprocket onto crankshaft while aligning balance shaft gears on opposite ends of shafts. Position crankshaft comparison camshaft sprocket in a way that allows passage of a looped chain over it. Apply thread locking compound onto camshaft sprocket bolt threads then tighten them up. Install crankshaft position sensor reluctor ring and apply RTV sealant to engine block sealing surface. Place new front cover and oil seal assembly in place plus tighten down on retaining bolts of cover afterward screws are tightened except for one at each end of upper edge of front plate where the attachment is made at an angle toward middle). Finally put back oil pan, vibration damper and then crankshaft position censor.

It is necessary to employ a special tool, camshaft holding tool, number GM# J-44221 or equivalent, for this operation. The timing system is a bit complicated and if a mistake is made during this process enormous damage to the engine can occur; therefore the work of this kind should be entrusted only to experienced personnel and it is mandatory to make sure twice of what has been done before starting the engine. Starting from TDC of cylinder number one the valve cover and the engine front cover should be unbolted; the word Delphi on the exhaust camshaft should be aligned with the valve cover mounting surface. Second, then, take off both the intake and the exhaust camshaft position sensors, then, the timing chain tensioner will then collapse thus requiring you to put a drill bit or a golf tee into position to keep it like that. Place the camshaft holding tool at the rear of the camshafts and then remove the top chain guide and the exhaust camshaft position actuator though holding the camshaft at the same time while undoing the bolt. Continue with the process of taking off the intake camshaft sprocket, disconnect the crankshaft sprocket from the camshaft chain, and then also take off the chain doing it while keeping the camshaft in a fixed position. Take out two access hole plugs from the front of the cylinder head, timing chain tensioner shoe bolt, timing chain guide bolt, after that take out the guide and shoe and the tensioner if they are being replaced. Take off the crankshaft sprocket, and prior to the startup of the engine, do the rotation of the crankshaft at least around two times and feel for any kind of load that signify an issue. When fitting the camshaft sprockets, fit new bolts and if disconnected, refit the tensioner and tighten to the indicated torque. Place the chain guide and shoe on the chain and tighten the bolts then fit the two holes with the access plugs. Before starting the engine, make sure that cylinder no.1 is again at TDC with the lobes of both Camshafts located at the front side of the Engine Head pointing upward with the Camshaft flats located at the back side also pointing upward. Fit the crank sprocket, still position the chain on the intake sprocket with one mark lined up with a dark link, thread the chain around the cylinder head through the crank sprocket ensuring the second mark is lined up. Bolt in the intake sprocket on the intake camshaft, and there might be a need to loosen and re-tightening of a holding tool for accurate alignment. Raise the timing chain up and manoeuvre the exhaust camshaft actuator over the correct sprocket so that a mark on the actuator is lined up with a dark link, then secure the actuator to the exhaust camshaft but do not over-tighten the bolt yet. Turn the exhaust camshaft actuator clockwise as far as it can be turned and make sure that the pointer is at the '0' mark before tightening the bolt. Loosen the intake camshaft sprocket bolt if it hasn't been done already and then use the drill bit or tee to turn the tensioner in and out Remove the camshaft holding tool. Lastly, align the timing mark and to finish the installation, reverse the whole procedure of removing number 4 cylinder head.

Pull the multiplug connector out of the negative battery terminal, then pull up and slide off the rear engine cover, then turn off the engine coolant and oil, remove the drive belts and tensioners. Extract the air filter housing and intake duct also, then unplug the upper and lower radiator hoses, the cooling fans and the water pump. Take out the crankshaft balance and, for all but the 5.7L engines, the Camshaft Position sensor and the sensor harness. The timing chain cover being the subject of removal it is not important to fully remove the oil pan, just unbolt it.For the removal of the oil pan, the following steps need to be followed:1. Draw the oil pan to front cover bolts with the aid of the plucker when bringing the extraction tool towards the car.2. Remove it from under the car. Fully remove the alternator along with the mounting bolts that are usually on the top of it. Take out the timing chain cover bolts; then take off the cover from the block, try to pry it with a putty knife if it is jammed. Locate and pull out the oil pick-up tube and oil pump taken out and check for the gears, chain and dampener for any signs of wear of damage. Relax the camshaft sprocket bolt(s), screw the crankshaft balance bolt into the crankshaft and with your fingers rotate the crankshaft until you get a alignment of the timing marks and ensure the same is set when the number one piston is at TDC. There is one or more bolt which needs to be unbolted at the end of the camshaft Camshaft sprocket and chain should be removed as a single unit. If replacing the tensioner, remove from the engine. Check damages and wears on camshaft and crankshaft sprockets, and if is required, take off the sprocket of the crankshaft by the puller. Timing chains should always be replaced together with the camshaft and crankshaft sprockets when it is being replaced. Then, using a gasket scraper, remove old gasket material from the cover and the engine block; about the crank shaft sprocket with the Woodruff key; and push it to fit on the crank shaft. Cinch the timing chain tensioner and place it in proper position and install the tensioner and fix the bolts tightly. The next step is to turn the sprockets in such manner that the coinciding timing marks are placed at the corresponding positions; in case if not, the sprocket must be rotated until the mark on the crankshaft is pointing upward, i. e. at 12. Place the chain around the crankshaft sprocket with the mesh and place the camshaft actuator or sprocket and align the timing mark. Take out the tensioner retaining pin and fasten the camshaft position actuator solenoid valve. Then lubricate the chain with clean engine oil and fit the oil pump and the oil pick-up tube, though at this stage you might want to change the crankshaft front oil seal. Remove the timing chain cover and fit a new gasket and loosely re-install the cover to make certain that it is in the correct alignment. If alignment tools are not possible, take a straight edge and measure from the rail of the oil pan to the timing chain cover on both sides and if uneven, make adjustments to be as even as possible. Turn the cover bolts until they are aligned, and place RTV sealant where there is contact between the timing chain cover and the cylinder block, and then fit the oil pan. Last but not the least, pour the coolant into the engine and oil into the crankcase and start the engine and search for any leaks.

Disconnect the cable from the negative terminal of the battery, drain the cooling system and engine oil, and remove the alternator. Next, take out the power steering pump, followed by the water pump and the camshaft position sensor. Disconnect the hoses from the coolant air bleed pipe and all hoses from the coolant manifold, securing them out of the way with wire. Use the correct power steering pulley removal tool to access the bolt behind the pulley, or alternatively, unbolt the power steering pump for clearance. Remove the crankshaft balancer and one of the belt tensioner bolts to access the timing chain cover bolts. Detach the timing chain cover from the block, taking care not to damage it, and remove the oil pump. Measure the timing chain freeplay; if it exceeds 5/8 inch, replace the chain and both sprockets. Loosen the camshaft sprocket bolts, rotate the crankshaft until the timing marks align, and verify that the number one piston is at TDC. Remove the camshaft sprocket and chain as an assembly, inspecting for damage or wear. If necessary, remove the crankshaft sprocket carefully. For installation, replace timing chains as a set with the camshaft and crankshaft sprockets, and use a gasket scraper to clean old gasket material from the cover and engine block. Align the crankshaft sprocket with the Woodruff key and press it onto the crankshaft, ensuring not to damage it. Loop the new chain over the camshaft sprocket, aligning the timing marks correctly, and apply thread locking compound to the camshaft sprocket bolt threads before tightening. Lubricate the chain with clean engine oil, install the oil pump and oil pickup tube, and replace the crankshaft front oil seal if needed. Install the timing chain cover loosely with a new gasket, aligning it properly by measuring the distance from the oil pan rail to the timing chain cover on both sides and adjusting as necessary. Once aligned, tighten the cover bolts, apply RTV sealant where the timing chain cover meets the cylinder block, and install the oil pan. Complete the remaining installation steps in reverse order, then add coolant and oil to the engine, running it to check for leaks.

To the above we add, To eradicate these parts, one should first unplug the wire from the doormat negative terminal followed by draining coolant. Subsequently, the drivebelt and tensioner must be taken off, the engine oil pan and the crankshaft balancer pulley must also be taken off. Remove the camshaft position actuator magnet and its O-ring, remove the thermostat and the water pump. Remove the bolts between the timing chain cover and the engine block, and then release the connected sections by applying a soft face hammer in case of possible rigidity. For the same purpose tighten the crankshaft pulley bolt for some time and rotate the crankshaft until the timing mark of the crankshaft sprocket is brought in line with the chain tensioner plate and at the same time the hole on the camshaft sprocket is at the 6 o'clock position. If you are PF or have a TCI solenoid, use a TORX PLUS socket to loosen and remove the camshaft sprocket bolt(s) without rotating the camshaft. Loosen the variable camshaft timing sprocket from the camshaft dowel pin and take the timing chain and a camshaft sprocket away from the engine. Check the timing chain worn, damaged or showing more freeplay than permissible limit, also check the sprockets of the timing chain and replace them both as pairs. The step of alignment during the installation is the matching of key in the crankshaft to the keyway in the sprocket, pay attention to the wear and defects of the timing chain tensioner, and wash the parts. Recut and clean the mating surface of the cover and remove the old gasket material on the engine block, put the tensioner plate into the engine block and align the dowel pin of the camshaft and also against 3 o'clock before mating the timing chain with the sprockets of the camshaft and crankshaft. Bolt the variable camshaft timing sprocket, apply oil on the chain and sprocket then, remove the tensioner locking pin. Use of the anaerobic sealant to stick the new gasket into place and the cover fitted and tightening the bolts in the star pattern. Last of all, pour the oil and the coolant; switch on the engine; look for any signs of leakage.

Remove the battery cable from the negative terminal, and drain out the cooling system and the engine oil, and then remove the upper and the lower fan shrouds, drivebelt, cooling fan and the water pump. Eliminate the crankshaft balancer and also the oil pan in order to access the bearings. For the 2005 on models, remove the mounting bolts and the camshaft position sensor comes off as well. Remove the mounting bolts that secure the timing chain cover and, in case this requires additional force, use a putty knife to loosen up the gasket but without harming the aluminum piece. The oil pick-up tube and the oil pump should be removed to take measurements of the timing chain freeplay; anything over 5/8 of an inch should have a new chain and both sprockets put in. The next steps are to slack off the camshaft sprocket bolts, turn the crankshaft so that its timing mark is in line with the number one cylinder and make sure number one piston is also at TDC. Take out the bolts that are at the end of the camshaft, and, therefore, the camshaft sprocket and the chain. For 2005 on models, the timing chain damper will have to be removed. Check the camshaft and crankshaft sprockets of its fitness to proceed, if required, remove the crankshaft sprocket gently. While your car is still off, turn the engine by gripping the top of the crankshaft to feel for any form of push back at least turn it two more times. Timing chains should be replaced in sets with the sprockets and gasket scraper should be used to remove old materiel from the cover and engine block. Bolt the timing chain damper and then engage the crankshaft sprocket with the Woodruff key, and then push on to the crankshaft. Thread the new chain through the front and rear sprockets so the timing marks line up and apply a thread locking compound to the sprocket bolt threads before torquing the bolt. Oil the chain with clean engine oil, fit in the oil pump and oil pick-up tube and loosely fit the timing chain cover with a new gasket. The timing chain cover doesn't need the oil pan rail be perfect on each end, just make them even, then Tighten the cover bolts. Use RTV sealant round the lower edge of the timing chain cover onto the cylinder block, fit the oil pan on, and do the other components fitting as the instruction in the reverse order. Last step is to put some coolant and oil and start the vehicle and look for the any leakage in the engine.

To remove the timing chain cover, you need to first detach the negative cable from the battery and drain all the coolant. Afterwards, take out cooling fan, water pump, drive belt pulley and vibration damper. Then remove crankshaft position sensor and wiring harness nut. Remove oil pan then disconnect wiring harness clips from front cover. Remove crankshaft position sensor and camshaft position sensor with its jumper wiring harness. Afterward, remove the cover bolts and separate timing chain cover from block. Remove crankshaft position sensor reluctor ring and check timing chain free play. When needed replace the chain as well as sprockets. Be sure to align sprocket timing marks as well as release timing chain tensioner. To install timing chain cover clean engine block sealing surfaces then line up keyway on crankshaft sprocket. Press sprocket onto crankshaft while aligning balance shaft gears on opposite ends of shafts. Position crankshaft comparison camshaft sprocket in a way that allows passage of a looped chain over it. Apply thread locking compound onto camshaft sprocket bolt threads then tighten them up. Install crankshaft position sensor reluctor ring and apply RTV sealant to engine block sealing surface. Place new front cover and oil seal assembly in place plus tighten down on retaining bolts of cover afterward screws are tightened except for one at each end of upper edge of front plate where the attachment is made at an angle toward middle). Finally put back oil pan, vibration damper and then crankshaft position censor.

To remove the timing chain cover, you need to first detach the negative cable from the battery and drain all the coolant. Afterwards, take out cooling fan, water pump, drive belt pulley and vibration damper. Then remove crankshaft position sensor and wiring harness nut. Remove oil pan then disconnect wiring harness clips from front cover. Remove crankshaft position sensor and camshaft position sensor with its jumper wiring harness. Afterward, remove the cover bolts and separate timing chain cover from block. Remove crankshaft position sensor reluctor ring and check timing chain free play. When needed replace the chain as well as sprockets. Be sure to align sprocket timing marks as well as release timing chain tensioner. To install timing chain cover clean engine block sealing surfaces then line up keyway on crankshaft sprocket. Press sprocket onto crankshaft while aligning balance shaft gears on opposite ends of shafts. Position crankshaft comparison camshaft sprocket in a way that allows passage of a looped chain over it. Apply thread locking compound onto camshaft sprocket bolt threads then tighten them up. Install crankshaft position sensor reluctor ring and apply RTV sealant to engine block sealing surface. Place new front cover and oil seal assembly in place plus tighten down on retaining bolts of cover afterward screws are tightened except for one at each end of upper edge of front plate where the attachment is made at an angle toward middle). Finally put back oil pan, vibration damper and then crankshaft position censor.

To remove an engine's timing chain, firstly disconnect the negative battery cable and drain the cooling system and engine oil. Next is to remove the water pump and crankshaft balancer then disconnect the wiring from the camshaft position sensor and camshaft position actuator magnet. After this, carefully unscrew the bolts of the timing chain cover without damaging it as well as remove an oil pump too. On engines without camshaft position actuators, loosen the camshaft sprocket bolts, rotate crankshaft until timing marks agree, then remove them along with chain as an assembly. For engines with camshaft position actuators though, turn the crankshaft such that timing marks are aligned hence removing solenoid valve and detaching actuator assembly and chain. Check if there is any wear or damage on timing chain tensioner, camshaft and crankshaft sprockets. If need be, disconnect sprocket from crankshaft. While reinstalling clean gasket surfaces and align Woodruff key with crankshaft sprocket. Take a new chain around camshaft sprocket meshing it into crankshaft sprocket. Make sure that timing marks are in line for engines having camshaft position actuators. Torque tighten fittingly either bolt of a camshaft sprocket or actuator valve compressing tensioner so as to hold it in place finally insert oil pump back into its housing. Finalize by cleaning out timing chain cover reattaching it securely using alignment tool placing a new crank shaft oil seal lastly performing reinstallation steps in reverse order after which fill up cooling system then do engine oil replacement together with changing oil filter checking for any engine leaks of coolant or oils.

Wait until the engine is completely cool before beginning this procedure. Caution: The timing system is complex, and severe engine damage will occur if mistakes are made. Do not attempt this procedure unless highly experienced with this type of repair; if unsure, consult an expert. Double-check all work to ensure everything is correct before attempting to start the engine. Disconnect the cable from the negative terminal of the battery, drain the cooling system and engine oil, and remove the water pump by detaching the hoses and lifting off the manifold. Remove the crankshaft balancer, disconnect the wiring from the camshaft position sensor and actuator magnet if equipped, and remove the oil pan. Remove the timing chain cover by taking out the mounting bolts and separating it from the block, using a putty knife if necessary to break the gasket seal without damaging the cover. For engines without a camshaft position actuator, loosen the camshaft sprocket bolts, rotate the crankshaft until the timing marks align, and then detach the camshaft sprocket and chain as an assembly, ensuring not to turn the crankshaft or camshaft while the chain is off. For engines with a camshaft position actuator, rotate the crankshaft until the timing marks align, remove the solenoid valve from the upper sprocket assembly, loosen the actuator from the camshaft, and remove the actuator assembly along with the chain, again ensuring not to turn the crankshaft or camshaft while the chain is off. Inspect the timing chain tensioner, camshaft, and crankshaft sprockets for wear and damage, and if necessary, remove the sprocket from the crankshaft carefully. Before starting the engine, rotate the crankshaft by hand through at least two full revolutions, checking for resistance. Timing chains must be replaced as a set with the camshaft and crankshaft sprockets. Use a gasket scraper to remove old gasket material from the cover and engine block, align the crankshaft sprocket with the Woodruff key, and press it onto the crankshaft. Loop the new chain over the camshaft sprocket, position the camshaft sprocket on the end of the camshaft, and ensure the timing marks align. For engines using a camshaft position actuator, verify that the timing chain does not protrude in front of the engine block. Tighten the camshaft sprocket bolt or new camshaft position actuator valve, compress the timing chain tensioner, install it, and remove the pin to allow it to extend. Install the oil pump, clean all sealing areas of the timing chain cover, and install the cover loosely with a new gasket. For 2009 and 2010 models, align the timing chain cover using a cover alignment tool, then tighten the cover bolts. For 2011 and later models, use the appropriate tools to align the front cover to the oil pan and center the hole over the crank. Install a new crankshaft oil seal, apply RTV sealant where the oil pan meets the engine block, and complete the installation in reverse order of removal. Refill the cooling system and engine oil, replace the engine oil filter, run the engine, and check for leaks.

To remove the timing chain cover, you need to first detach the negative cable from the battery and drain all the coolant. Afterwards, take out cooling fan, water pump, drive belt pulley and vibration damper. Then remove crankshaft position sensor and wiring harness nut. Remove oil pan then disconnect wiring harness clips from front cover. Remove crankshaft position sensor and camshaft position sensor with its jumper wiring harness. Afterward, remove the cover bolts and separate timing chain cover from block. Remove crankshaft position sensor reluctor ring and check timing chain free play. When needed replace the chain as well as sprockets. Be sure to align sprocket timing marks as well as release timing chain tensioner. To install timing chain cover clean engine block sealing surfaces then line up keyway on crankshaft sprocket. Press sprocket onto crankshaft while aligning balance shaft gears on opposite ends of shafts. Position crankshaft comparison camshaft sprocket in a way that allows passage of a looped chain over it. Apply thread locking compound onto camshaft sprocket bolt threads then tighten them up. Install crankshaft position sensor reluctor ring and apply RTV sealant to engine block sealing surface. Place new front cover and oil seal assembly in place plus tighten down on retaining bolts of cover afterward screws are tightened except for one at each end of upper edge of front plate where the attachment is made at an angle toward middle). Finally put back oil pan, vibration damper and then crankshaft position censor.

To remove the timing chain cover, you need to first detach the negative cable from the battery and drain all the coolant. Afterwards, take out cooling fan, water pump, drive belt pulley and vibration damper. Then remove crankshaft position sensor and wiring harness nut. Remove oil pan then disconnect wiring harness clips from front cover. Remove crankshaft position sensor and camshaft position sensor with its jumper wiring harness. Afterward, remove the cover bolts and separate timing chain cover from block. Remove crankshaft position sensor reluctor ring and check timing chain free play. When needed replace the chain as well as sprockets. Be sure to align sprocket timing marks as well as release timing chain tensioner. To install timing chain cover clean engine block sealing surfaces then line up keyway on crankshaft sprocket. Press sprocket onto crankshaft while aligning balance shaft gears on opposite ends of shafts. Position crankshaft comparison camshaft sprocket in a way that allows passage of a looped chain over it. Apply thread locking compound onto camshaft sprocket bolt threads then tighten them up. Install crankshaft position sensor reluctor ring and apply RTV sealant to engine block sealing surface. Place new front cover and oil seal assembly in place plus tighten down on retaining bolts of cover afterward screws are tightened except for one at each end of upper edge of front plate where the attachment is made at an angle toward middle). Finally put back oil pan, vibration damper and then crankshaft position censor.

Remove the front engine cover fasteners and the cover, followed by the rear cover fasteners and the rear cover.

Use a gasket scraper to clean the cover and engine block, align the crankshaft sprocket with the Woodruff key, and press it onto the crankshaft.