Buick 10241740 Rod Assembly, Valve Push

For models from 1985 through 1999, begin by detaching the rocker arm cover(s) from the cylinder head(s) and loosening the rocker arm stud nuts, storing them in marked containers for reinstallation. If only the pushrods are being removed, loosen the nuts enough to rotate the rocker arms aside. Lift off the rocker arms and pivot balls, storing them with the nuts, and remove the pushrods, keeping them separate to avoid mixing. Inspect each rocker arm for wear and damage, ensuring the pushrod end hole is clear, and check the pivot area for wear or cracks; replace any damaged components. Inspect the pushrods for cracks and bend by rolling them on a flat surface. Lubricate the lower end of each pushrod and reinstall them, ensuring they seat completely in the lifter. Apply grease to the valve stems and pushrod ends before positioning the rocker arms, then install the pivot balls and nuts, applying grease to prevent damage until oil pressure builds. For valve adjustment, bring the number one piston to top dead center on the compression stroke, tighten the rocker arm nut until all play is removed, then tighten an additional full turn. Adjust the valves for cylinders 1, 5, 6, and intake valves for cylinders 1, 2, and 3, then rotate the crankshaft to TDC for cylinder four and adjust the corresponding valves. Finally, install the rocker arm covers and start the engine, checking for unusual noises and oil leaks. For models from 2000 and later, detach the rocker arm cover(s) and loosen the rocker arm mounting bolts, removing the assemblies and storing them in marked containers. Remove the rocker arm support and pushrods, inspecting all components for wear and damage. Lubricate the pushrods and install them in their original locations, applying assembly oil to the rocker arm roller bearing pivots. Position the rocker arm support correctly and install the rocker arm assemblies, tightening the bolts finger-tight initially. Bring the number one piston to TDC on the compression stroke, tighten the rocker arm bolt until all play is removed, then tighten an additional full turn and to the specified torque. Adjust the valves for cylinders 1, 5, 6, and intake valves for cylinders 1, 2, and 3, then rotate the crankshaft to TDC for cylinder four and adjust the corresponding valves. Finally, install the rocker arm covers, start the engine, and check for unusual noises and oil leaks.

To remove the valve covers, first detach them from the cylinder heads. Proceed by loosening and removing rocker arm stud nuts, starting from the front of one cylinder head. Keep these nuts in separate containers that are labeled so you can put them back correctly. On 1998 models and prior ones, in case only pushrods have to be removed, loosen each nut just enough to enable you rotate the rocker arms out of the way for pushrod removal. Instead of using pivot balls, roller-rocker arms on model year 2000 and later are retained by bolts. Put away rocker arms and pivot balls with nuts for reinstallation later on. Take out pushrods and keep them apart to avoid mix up during installation utilizing a perforated cardboard box which allows organized storage. Examine each rocker arm for wear, cracks or any other damage focusing on areas where rocker arm faces contact with pushrods and valve stems. Make sure that hole at the pushrod end of each rocker arm is open and inspect rocker arm pivot area for wear, cracks or galling. In particular, replace all worn roller rocker arms along with new pivot balls on 2000 and newer models. Check whether there are cracks or excessive wear on pushrods by rolling them on a flat surface to see if they are bent. To install, lubricate lower end of every single pushrod using clean engine oil or moly-base grease; seat in their original lifter positions; apply moly-base grease to valve stems as well as pushrod ends before placing the rocker arms over studs. Install pivot balls and nuts making sure that flat side of each nut faces pivot ball. Tighten down the rocker arm nuts properly. Reverse order reassemble remaining components; start engine then check for valve cover leaks as well as valvetrain noise (Haines). Note too that most models do not require a valve adjustment except specific instructions provided here for valve adjustment on 1994 VIN Z engines including setting the engine to TDC, aligning timing marks, and adjusting rocker arm nuts for specified valves at TDC for each cylinder.

To begin with, the rocker arms should be removed and inspected by first removing the rocker arm covers from the cylinder heads and then loosening and removing the rocker arm stud nuts for reinstallation in their original positions. While removing push rods, just loosen up the nut on each side of a rocker arm enough to move it aside for removal of a push rod. With these nuts, lift off the rocker arms and pivot balls. Remove push rods in order. Pay particular attention to wear, cracks, or damage where they contact with valve stems or push rods when examining rocker arms. The open holes at the end of each push rod in every rocker arm must be checked together with wear, fractures or galling within these pivot locations. If there are any worn out or damaged rocker arms, use new ones instead and replace them alongside new pivot balls. Look for cracks, excessive wear and bending on pushrods themselves. Lubricate ends of pushrods using engine oil or moly based grease before reinstalling them back into their lifter sockets such that they fit well. Lower ends of valve stems as well as upper ends of pushrod are then lubricated using moly based grease before fitting rockers over studs. Put pivot balls on top of studs, and put nuts flat-side against the pivot balls; apply moly-based grease to pivot balls for initial lubrication until oil pressure builds up. For different engine types one should refer to specific instructions regarding valve adjustment while for general consideration after finalizing all valve adjustments reinstall the rocket arm covers start your engine check for abnormal sounds in your valve train after which you should check if there is any oil leaking through joints between your jointer tube and gasket cover.

First, remove the valve cover from the cylinder head to inspect and take out rocker arms and pushrods. It is important to make sure that a specific cylinder is at Top Dead Center (TDC) and that the lifters for this cylinder are on base circle of camshaft when removing them. To show TDC, use a plastic pen through the spark plug hole to raise piston on its highest point by rotating the crankshaft. Loosen rocker arm bolts, take off rocker arm nuts, rocker arms and pivot balls ensuring they are carefully stored in marked containers. Rotate the rocker arms aside for an easy pushrod removal. Also, don't forget about the pushrod guides if necessary remove them marking them for proper reinstallation. Look for wear, cracks, or damage especially where they contact with pushrods and valve stems on rocker arms. Inspect the rocker arm pivot area for wear, cracks or galling and make sure that each rocker arm has an open pushrod-end hole. Replace damaged or worn out rocker arms with new pivot balls as required. Lubricate lower ends of pushrods with engine oil or moly-based grease before installing them into their original locations and checking that they sit properly in lifter socket. Apply moly-based grease on valve stem ends and upper pushrod ends before positioning you're your installing bolts for aileron activator. With care, install pivot balls and bolts then tighten rocker arm nuts while no valve spring load is present on it; replace retainer bolt hand-tight before torquing down to specified amounts using a torque wrench set at 14-15 lb-ft; replace retainer bolt hand-tight before torquing down to specified amounts using a torque wrench set at 14-15 lb-ft. In later models align tab on roller rocket pivot with slot in cylinder head casting protrusion; reinstall valve cover after tightening rocker arms then check for oil leaks or valve train noises after starting the engine.

To remove the valve covers, first detach them from the cylinder heads. Proceed by loosening and removing rocker arm stud nuts, starting from the front of one cylinder head. Keep these nuts in separate containers that are labeled so you can put them back correctly. On 1998 models and prior ones, in case only pushrods have to be removed, loosen each nut just enough to enable you rotate the rocker arms out of the way for pushrod removal. Instead of using pivot balls, roller-rocker arms on model year 2000 and later are retained by bolts. Put away rocker arms and pivot balls with nuts for reinstallation later on. Take out pushrods and keep them apart to avoid mix up during installation utilizing a perforated cardboard box which allows organized storage. Examine each rocker arm for wear, cracks or any other damage focusing on areas where rocker arm faces contact with pushrods and valve stems. Make sure that hole at the pushrod end of each rocker arm is open and inspect rocker arm pivot area for wear, cracks or galling. In particular, replace all worn roller rocker arms along with new pivot balls on 2000 and newer models. Check whether there are cracks or excessive wear on pushrods by rolling them on a flat surface to see if they are bent. To install, lubricate lower end of every single pushrod using clean engine oil or moly-base grease; seat in their original lifter positions; apply moly-base grease to valve stems as well as pushrod ends before placing the rocker arms over studs. Install pivot balls and nuts making sure that flat side of each nut faces pivot ball. Tighten down the rocker arm nuts properly. Reverse order reassemble remaining components; start engine then check for valve cover leaks as well as valvetrain noise (Haines). Note too that most models do not require a valve adjustment except specific instructions provided here for valve adjustment on 1994 VIN Z engines including setting the engine to TDC, aligning timing marks, and adjusting rocker arm nuts for specified valves at TDC for each cylinder.

To remove the valve covers, first detach them from the cylinder heads. Proceed by loosening and removing rocker arm stud nuts, starting from the front of one cylinder head. Keep these nuts in separate containers that are labeled so you can put them back correctly. On 1998 models and prior ones, in case only pushrods have to be removed, loosen each nut just enough to enable you rotate the rocker arms out of the way for pushrod removal. Instead of using pivot balls, roller-rocker arms on model year 2000 and later are retained by bolts. Put away rocker arms and pivot balls with nuts for reinstallation later on. Take out pushrods and keep them apart to avoid mix up during installation utilizing a perforated cardboard box which allows organized storage. Examine each rocker arm for wear, cracks or any other damage focusing on areas where rocker arm faces contact with pushrods and valve stems. Make sure that hole at the pushrod end of each rocker arm is open and inspect rocker arm pivot area for wear, cracks or galling. In particular, replace all worn roller rocker arms along with new pivot balls on 2000 and newer models. Check whether there are cracks or excessive wear on pushrods by rolling them on a flat surface to see if they are bent. To install, lubricate lower end of every single pushrod using clean engine oil or moly-base grease; seat in their original lifter positions; apply moly-base grease to valve stems as well as pushrod ends before placing the rocker arms over studs. Install pivot balls and nuts making sure that flat side of each nut faces pivot ball. Tighten down the rocker arm nuts properly. Reverse order reassemble remaining components; start engine then check for valve cover leaks as well as valvetrain noise (Haines). Note too that most models do not require a valve adjustment except specific instructions provided here for valve adjustment on 1994 VIN Z engines including setting the engine to TDC, aligning timing marks, and adjusting rocker arm nuts for specified valves at TDC for each cylinder.

Detach the rocker arm covers from the cylinder heads.

Rotate the crankshaft to 60 degrees before TDC to reduce valve spring tension while tightening the rocker arm nuts/bolts to the specified torque.

If any rocker arms are worn or damaged, they should be replaced. Additionally, the roller bearings should be checked to ensure they rotate freely.

The pushrods should be removed separately to avoid mixing them up.