Installation

CAUTION: To prevent damage to cylinder block or parts installed:
^ All parts to be installed must be perfectly clean.
^ Be sure to apply engine oil to the crankshaft journals, journal bearings, thrust bearings, crankpins, connecting rod bearings, pistons, piston rings, and cylinder bores.
^ Journal bearings, bearing caps, connecting rod, rod bearings, rod bearing caps, pistons, and piston rings are in combination sets. Do not disturb the combinations and check to ensure that each part goes back to where it came from when installing.

^ Tools Required:
- J 34853 Crankshaft Oil Seal Guide
- J 8037 Piston Ring Compressor
- Or Equivalents


1. Main bearings lower half to crankshaft: install the half with oil groove (upper half) to cylinder block.
2. Thrust bearings to cylinder block between No. 2 and No. 3 cylinders. Face the oil groove sides to counterweights.
3. Crankshaft to cylinder block.

NOTE: On each main bearing cap, the arrow mark and number are embossed. When installing each main bearing cap to the cylinder block, point the arrow mark toward the crankshaft pulley side and install each cap from crankshaft pulley end to flywheel in order 1, 2, 3, 4 and 5.

4. Five main bearing caps and two bearing cap supports; secure with ten main bearing cap bolts.

NOTE:
^ Gradual and uniform tightening is important for main bearing cap bolts.
^ After tightening main bearing bolts, check to be sure that crankshaft rotates smoothly when turned by hand.

^ Tighten the main bearing cap bolts to 54 Nm (40 ft. lbs.).

5. Apply light coat of clean engine oil to pistons, rings, cylinder walls, connecting rod bearings and crank pins.





6. Guide hoses over the connecting rod bolts to prevent damage to bearing journal and connecting rod bolt threads when installing connecting rods.





7. Piston and connecting rod into cylinder bore using a piston ring compressor, ensuring arrow mark on top of the piston points to crankshaft pulley end. Use a hammer handle to tap piston head and install piston into cylinder bore, keeping the piston ring compressor pressed securely against the top of the cylinder block until all piston rings have entered cylinder bore.
8. Remove hose pieces from connecting rod bolts.
9. Connecting rod bearing cap to connecting rod; secure with two nuts.

NOTE: Be sure to point arrow mark on cap toward the crankshaft pulley side.

^ Tighten the connecting rod bearing cap nuts to 35 Nm (26 ft. lbs.).
10. Rear main seal housing and new gasket to engine; secure with five rear main seal housing bolts. There are two different bolt lengths. Ensure correct placement.
^ Tighten the rear main seal housing bolts to 12 Nm (106 inch lbs.).

NOTE: After the rear main seal housing bolts are tightened, the gasket may extend past the rear main seal housing. Trim the excess with a sharp knife so the gasket is flush with the cylinder block.

11. Apply a thin coat of oil to crankshaft seal guide.





12. Oil seal to crankshaft using a crankshaft seal guide.








13. Two guide pins and oil pump assembly with new gasket and rubber oil pump-to-coolant pump seals to crankshaft using crankshaft seal guide; secure with seven bolts.
^ Tighten the oil pump bolts to 11 Nm (97 inch lbs.).
^ Ensure the oil seal lip is not upturned, then remove the crankshaft oil seal guide.
^ Inspect the edge of oil pump gasket. If it protrudes out into the engine oil pan mating surface, trim with a sharp knife, making edge smooth and flush with mating surface of the engine oil pan.





14. Apply gasket paste GM P/N 1050026, or equivalent, to the engine oil pan mating surface in a continuous bead.
15. Oil pump strainer to engine oil pan.





16. Oil pump strainer to cylinder block; secure with two bolts.
^ Tighten the oil pump strainer bolts to 11 Nm (97 inch lbs.).
17. Engine oil pan to cylinder block; secure with sixteen bolts and two nuts.
^ Tighten the engine oil pan nuts and bolts to 11 Nm (97 inch lbs.).
18. Engine oil pan drain plug and gasket to engine oil pan.
^ Tighten the engine oil drain plug to 35 Nm (26 ft. lbs.).
19. New O-ring seal to coolant intake pipe.
20. Coolant intake pipe to cylinder block; secure with one bolt.
^ Tighten the coolant intake pipe bolt to 11 Nm (97 inch lbs.).
21. Coolant pump with new gasket to engine; secure with five bolts.
^ Tighten the coolant pump bolts to 12 Nm (106 inch lbs.).
22. Rubber seals between coolant pump and oil pump and between coolant pump and cylinder head.
23. Engine oil level indicator tube with new O-ring to cylinder block; secure with mounting bolt. Do not tighten fully.
^ Tighten the engine oil level indicator tube mounting bolt to 11 Nm (97 inch lbs.).
24. Right-side engine mount to engine; secure with three right-side engine mount-to-engine bracket bolts.
^ Tighten the right-side engine mount-to-engine bracket bolts to 55 Nm (40 ft. lbs.).
25. Left-side engine mount to engine; secure with three left-side engine mount-to-engine bracket bolts.
^ Tighten the left-side engine mount-to-engine bolts to 55 Nm (40 ft. lbs.).
26. Cylinder head onto cylinder block.