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.