GM 91177383
Piston

After removing the Cylinder Head from the cylinder block maintain this order: oil pan removal and oil pump strainer removal. An appropriate tool known as the ridge reamer removes top cylinder bore carbon to eliminate ridges which prevents ring land damage. Write down the cylinder identifier on all three parts including connecting rod bearings and connecting Rod Bearing caps. During Piston and connecting rod removal from the cylinder bore protect the components by placing a hose over the connecting rod studs after removing twc nuts and the connecting Rod Bearing cap. Examine the Piston and connecting rod assembly before picking the correct connecting Rod Bearing while also selecting the suitable Piston. Clean engine oil receives a thin layer application on pistons rings cylinder walls connecting rod bearings and crank pins. Put another piece of hose over the connecting rod studs before putting the rod in place to reduce installation-related damage. Check that the arrow mark on the Piston's top faces toward the Crankshaft pulley position. The j 8037 ring compressor (J 8037) assists in compressing Piston rings before you place the Piston and connecting rod inside the cylinder bore. Use a hammer handle to tap the Piston as you smoothly push the j 8037 against the cylinder block's top until all rings reach the cylinder bore position. For connecting rod bolt removal, fasten the Rod Bearing cap to the assembly with twc nuts after wiping off the hose pieces. Tighten these nuts to 35 nm (26 ft. Lbs.). After completing these steps install both the engine Oil Pan and the Cylinder Head onto the cylinder block.

Ensure the arrow mark on the top of the piston faces the crankshaft pulley side.