GM 90540002
Intake Camshaft

The replacement of the right Camshaft begins by disconnecting the negative Battery Cable followed by removing the intake plenum, intake air resonator, right Camshaft cover together with the front Timing Belt cover. The installer should remove the Timing Belt and turn the Crankshaft counterclockwise 60 degrees btdc before proceeding to stop valve/piston contact. Use the Camshaft gear locking tool (J 42069-1) for the Camshaft gear and then begin loosening the Camshaft gear bolt before removing both tools as you will discard the bolt. Free the Camshaft lifters from creating any binding forces since load on them leads to removal difficulties. The procedure starts by sequentially loosening bearing cap bolts then removing the caps while documenting the code marks on each cap. The procedure begins by removing the Camshaft with attached seal before proceeding to remove the Camshaft Seal. Afterwards clean all contact surfaces on the bearing and the sealing component. Apply gm p/n 1052367 lubricant or an equivalent on the Camshaft bearing surfaces where the pins should be placed to minimize load during installation. Install the Camshaft while applying a small amount of loctite(R) 573 or equivalent at the forward edge of the front bearing caps before correctly placing them into position. Secure all Camshaft bearing cap bolts using equal force until they reach 8 nm (71 inch lbs.). Position gm p/n 12377985 chassis grease or equivalent on the Camshaft Seal lip before inserting it using the Camshaft/front main seal installer (J 35268-A). Twist the Camshaft gear bolt to 50 nm (37 ft. Lbs.) with the holding aid j 42069-1 in place and measure 60 degrees and 15 degrees more rotation with tool j 36660-a. After achieving tdc position for the Crankshaft, install all parts in the following order: Timing Belt, front Timing Belt cover, right Camshaft cover, intake plenum and intake air resonator with a final connection of the negative Battery Cable.

Remove the timing belt and rotate the crankshaft counterclockwise to the 60 degrees BTDC position to prevent valve/piston contact.

Apply Loctite 573 or equivalent.