GM 10241740
Push Rods

The first step for valve Rocker Arm and push rod replacement requires uninstalling the valve Rocker Arm cover. The valve Rocker Arm and the valve Pushrod should be removed before cleaning and inspecting them. Install the valve Rocker Arm together with the valve Pushrod while putting back the valve Rocker Arm cover into its proper place.

Begin valve Rocker Arm and push rod replacement by removing the valve Rocker Arm cover then using marks and organization to separate all components for assembly purposes. The next stage involves removing valve rocker arms together with valve Rocker Arm supports and valve pushrods while applying marks and organization to reusable parts. Cleaning solvent needs application to all components before using compressed air for drying. First inspect valve Rocker Arm components by checking for smoothness while also evaluating wear on the valve Pushrod socket contact surface as well as inspecting the roller pivot for binding and damage to the valve stem contact surface and damage to bolt threads. Roll the valve pushrods on a flat surface to verify that their contact areas show no evidence of oil restrictions as well as end surface wear or scoring and this inspection will detect any bending too. Very careful examination of the valve rocker support must happen for the detection of any severe wear problems or structural damage. Installation requires precise organization of components as well as reinstallation at their standard positions. Start by installing the valve pushrods then place all valve Rocker Arm supports before their installation. Make sure the arrow point faces upward. Plant prelube gm p/n 12345501 (Canadian P/N 992704) or its equivalent on the valve Pushrod socket as well as roller pivot and valve stem tip. Installation of the valve Rocker Arm assemblies starts with finger-tightening the bolts at locations , and before completing bolt installation steps. Position the crankshaft balancer with its alignment mark pointed at angles 57-63 degrees through the engine front cover alignment tab in either clockwise or counterclockwise direction. The valve Rocker Arm assemblies require no further adjustment of valve lash after proper torquing. After finger-starting the valve Rocker Arm bolts at locations , , and the technician must complete the installation of the valve Rocker Arm cover.

Before replacement of the valve Rocker Arm and push rod members start by taking out the valve Rocker Arm cover before placing the valve rocker arms pushrods and pivot support into a rack for easy location replacement. First detach the valve Rocker Arm bolts before removing both the valve rocker arms and the valve Rocker Arm pivot support and subsequently removing the pushrods. The cleaning process should focus on valve rocker arms and pushrods before installation in their default positions since valve lash requires no changes during replacement. The application of clean engine oil should be used to lubricate both the valve rocker arms and pushrods while additionally lubricating the flange of the valve Rocker Arm bolts. Fit the valve Rocker Arm pivot support while keeping the pushrods in position inside their respective valve lifter sockets and the ends of the rocker arms but do not tighten the bolts at this moment. The Crankshaft needs to rotate until Piston number one reaches compression stroke top dead center (TDC) where the cylinder number one rocker arms will be off lobe lift while the Crankshaft sprocket key positions at 1:30. The engine should be positioned to allow tightening of the valve Rocker Arm bolts for cylinders 1, 2, 7, and 8 exhaust to 30 nm (22 ft. Lbs.) while bolts for cylinders 1, 3, 4, and 5 intake will receive 30 nm (22 ft. Lbs.) torque. The Crankshaft must be rotated three hundred sixty degrees before torquing the valve Rocker Arm bolts for exhaust cylinders 3, 4, 5, and 6 to 30 nm (22 ft. Lbs.) while torquing intake cylinders 2, 6, 7, and 8 to 30 nm (22 ft. Lbs.). You should install the valve Rocker Arm cover as the last step.

A proper replacement of valve Rocker Arm and push rod begins with effective marking and component sorting before assembly process starts. The removal process should start with the uninstallation of the Rocker Arm cover. The Rocker Arm service starts with the removal of rocker arms and Rocker Arm supports and continues with Pushrod extraction. Examine the rocker arms for contamination and perform necessary cleaning before checking the Pushrod condition. The installation process requires proper storage of parts according to their original configuration before returning them to their original positions. The installation of pushrods begins with the Rocker Arm support having its arrow facing upward before installing the supports. Use the correct part number from sealers adhesives and lubricants to apply lubricant onto the Pushrod socket as well as the roller pivot and valve stem tip. Crank the Rocker Arm bolts at locations and using fingers first before proceeding with the rest of the Rocker Arm bolts. Turn the crankshaft balancer till the crankshaft balancer alignment mark sits 57-63 degrees either forward or backward from the engine front cover alignment tab. Rocker Arm installation completes the valve lash adjustment process which does not require further adjustment even if the torque reaches its proper value. Conclude the installation of the Rocker Arm cover while tightening the bolts at 30 n.m (22 lb ft).

The first step to valve Rocker Arm and push rod replacement requires removal of the valve Rocker Arm cover with proper part ordering for reassembly. Move on to the removal of valve rocker arms as well as valve Rocker Arm supports together with valve pushrods before you mark and arrange the parts you will reuse. The cleaning solvent serves to cleanse parts before compressing dry air onto them for ready use. The inspection of valve Rocker Arm components should focus on the valve Pushrod socket contact surface wear as well as the roller pivot binding and damage along with a check of valve stem contact surface and bolt thread damage. All valve pushrods need to be tested for oil piercings and wear marks on their contact edges while being examined for bending by placing them on a flat surface. During the inspection check for severe wear or damage on the valve rocker support components. Organize all parts before installation while replacing them to original positions. Position the arrow on the valve Rocker Arm support in an upward direction before installing the valve Rocker Arm supports. Corrosive prevention agent gm p/n 12345501 or equal treatment must be applied to both the valve Pushrod socket and roller pivot and valve stem tip. Start the valve Rocker Arm assembly bolts by hand at points and followed by the sequential bolt installation. Set the exhaust crankshaft balancer at 5763 degrees clockwise or counter-clockwise from the front engine cover alignment tab. Engine operation requires no further adjustment after the valve Rocker Arm assemblies receive correct 30 nm (22 ft. Lbs.) torque before reinstalling valve Rocker Arm covers. Install the valve Rocker Arm cover at the end of installation.

The replacement process for valve Rocker Arm and push rod begins with cover removal then sequence continues with valve Rocker Arm and valve Pushrod removal. Routine inspection of both valve Rocker Arm and valve Pushrod requires their cleaning process. Start by placing the valve Pushrod along with the valve Rocker Arm in their original places before reinstalling the valve Rocker Arm cover.

The replacement process of valve Rocker Arm and push rod starts with removing the valve Rocker Arm cover. The valve rocker arms alongside pushrods and pivot support need placement in a rack to enable their original placement. The correct replacement procedure begins with unthreading the valve Rocker Arm bolts that leads to removing the valve rocker arms and then the valve Rocker Arm pivot support followed by removing the pushrods. The repair process starts by cleaning all valve rocker arms together with pushrods. Install clean engine oil both on the valve rocker arms and pushrods while also applying it to the bolts flange across the valve Rocker Arm. Install first the valve Rocker Arm pivot support before you install the pushrods into their respective valve lifter sockets while the Rocker Arm bolts remain loose. Install the rocker arms and bolts before rotating the Crankshaft until the number one Piston reaches tdc (top dead center) of the compression stroke while maintaining cylinder number one rocker arms in the off lobe lift position and positioning the Crankshaft sprocket key at 1:30. The engine position demands valve Rocker Arm bolt tightening to 30 nm (22 lb ft) for cylinders 1, 2, 7, 8 exhaust and 1, 3, 4, 5 intake. The technician rotates the Crankshaft by 360 degrees before tightening all valve Rocker Arm bolts first for cylinders 3, 4, 5, 6 exhaust and then for cylinders 2, 6, 7, 8 intake to 30 nm (22 lb ft torque). To conclude the process install the valve Rocker Arm cover.

Assembly service of rocker arm parts starts with marking the components followed by sorting along with organizing them for reassembly. Duplicate courses of action start with scraping off the valve rocker arms before moving on to extracting the valve rocker arm supports and concluding with removing the valve pushrods.

Start the replacement process of valve Rocker Arm and push rod by taking out the Rocker Arm cover. The engine operates through a firing sequence that starts with numbers 1 then moves to 8 and 7 before continuing to 2 and following with 6 all the way to 4 then ending at cylinder number 3. This pattern occurs for both banks where 1, 3, 5 and 7 are left-bank cylinders. The number one cylinder Spark Plug removal process should begin with the rocker arms pushrods and pivot support placement onto a rack that will maintain their required positioning for later reinstallment. Begin by removing the Rocker Arm bolts until you can then take out the rocker arms as well as Rocker Arm pivot support and pushrods. The inspection and cleaning of rocker arms should be performed according to necessity. Prior to installation apply clean engine oil to every component such as the rockers and pushrods and the bolts' flange as well. The procedure requires installing the Rocker Arm pivot support as you assure each Pushrod finds its proper location in the valve lifter sockets while placing the pushrods in their correct position in the rocker arms before securing the bolts. Set the Crankshaft at top dead center compression position to position the number one Piston when the number one cylinder rocker arms sit off the lift pattern. You should use this engine position to tighten the Exhaust Valve bolts on rocks 1, 2, 7, and 8 and the Intake Valve bolts on rocks 1, 3, 4, and 5 to a torque of 30 nm (22 lb ft). Fasten the Rocker Arm bolts within the specified torque of 30 nm (22 lb ft) on exhaust valves between cylinders 3, 4, 5, 6 and intake valves between cylinders 2, 6, 7, 8. As the last step replace the number one cylinder Spark Plug and the Rocker Arm cover.

The procedure for valve Rocker Arm and push rod replacement starts with removing the valve Rocker Arm cover while you mark each part before sorting them properly to manage assembly. Valve rocker arms together with valve Rocker Arm supports and valve pushrods need removal at this time with proper part identification for re-use. Put cleaning solvent on all components before blow-drying with compressed air. A detailed inspection of the valve Rocker Arm elements must evaluate the condition of the valve Pushrod socket contact surface along with roller pivot binding and damage as well as valve stem contact surface health and bolt thread strength. A flat surface test should be used to check valve pushrods for possible oil blockage and end surface deterioration with bending also examined through this method. The state of the valve rocker support should be checked for any signs of excessive wear as well as damage. Parts should be organized before their original positions for installation. Put the valve pushrods in place while aligning their arrow with the up position on valve Rocker Arm supports. Install the valve Rocker Arm supports thereafter. Apply prelude gm p/n 12345501 (Canadian P/N 992704) or equivalent to the valve Pushrod socket along with the roller pivot and valve stem tip. Run a finger underneath the bolts found at positions , , and before tightening the rest of the valve Rocker Arm assembly bolts. The crankshaft balancer needs to rotate until the alignment mark points between 57 to 63 degrees either ahead or behind the engine front cover alignment tab. The installer does not need to adjust valve lash after completing proper torquing of valve Rocker Arm assemblies. The installation procedure ends with tightening the valve Rocker Arm bolts to 30 nm (22 ft. Lbs.) while reinstating the valve Rocker Arm cover.

Clean and inspect the rocker arms or pushrods as necessary.

No, additional valve lash adjustment is required.

Remove the valve rocker arm cover.

Apply lubricant GM P/N 12345501, (Canadian P/N 992704), or equivalent.

First, mark, sort, and organize all components for assembly.