GM 91177380
Piston

One must acquire a Piston Ring compressor (J8037) as the initial tool before commencing Piston maintenance. Begin your repair work by taking off the Cylinder Head from the cylinder block before proceeding to remove the Oil Pan together with the oil pump strainer. A ridge reamer should remove ridges along with carbon deposits from the cylinder bore top to avoid harming Piston Ring lands. Draw a cylinder label directly on each Piston and connecting rod and connecting Rod Bearing cap. Use hose pieces wrapped over connecting rod studs to shield the Crankshaft and cylinder wall while extracting the Piston and connecting rod from the cylinder bore. After this detach the two nuts and the connecting Rod Bearing cap. The mechanic should take apart the Piston and connecting rod components for inspection before picking the right connecting Rod Bearing along with Piston. Use clean engine oil to coat the components including pistons and rings and cylinder walls as well as connecting rod bearings and crank pins. An additional hose must cover the connecting rod studs when you install them to protect against potential installation damage. Position the arrow mark located on top of the Piston towards the Crankshaft Pulley direction. The Piston Ring compressor (J8037) should be utilized to compress Piston rings followed by Piston and connecting rod installation into the cylinder bore. Strike the Piston head with a hammer handle while holding the Piston Ring compressor (J8037) on top of the cylinder block until all Piston rings locate correctly. Screw the connecting rod bolts to the rod cap while using two nuts that need tightening to 35 nm (26 ft. Lbs.). The last part involves installing the engine Oil Pan along with the Cylinder Head onto the cylinder block.

Tap the piston head with a hammer handle while keeping the J 8037 pressed securely against the top of the cylinder block until all piston rings are in the cylinder bore.