Installation

INSTALLATION
1. Main bearings to crankshaft: install the half with engine oil groove to cylinder block.





2. Thrust bearings to cylinder block between No. 2 and No. 3 cylinders. Face the engine oil groove sides to counterweights.
3. Crankshaft to cylinder block.
4. 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 timing pulley side and install each cap from crankshaft timing pulley side to flywheel side in order: 1, 2, 3, 4 and 5.
5. Five main bearing caps; secure with ten main bearing bolts. 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 over by hand. Tighten main bearing bolts to 54 Nm (40 ft. lbs.).
6. Apply GM P/N 12346004 or equivalent, to the threads of one of the short bolts.
7. Rear main seal housing and new gasket to engine; secure with five housing bolts. There are two different bolt lengths. Ensure correct placement. Tighten rear main seal housing bolts to 12 Nm (106 inch lbs.). After the 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.
8. Four connecting rod caps; secure with eight cap nuts. Tighten connecting rod cap nuts to 35 Nm (26 ft. lbs.).
9. Oil pump to cylinder block using a J 34853 to help install the oil seal over the crankshaft. During oil pump installation, ensure that oil seal lip is not turned out.
10. Remove the J 34853.
11. Apply GM P/N 12346004 or equivalent, to the thread portion of the short oil pump mounting bolt indicated.
12. Oil pump mounting bolts to oil pump assembly. Tighten oil pump mounting bolts to 11 Nm (97 inch lbs.).
13. Rubber seal between oil pump and coolant pump.
14. Edge of oil pump gasket might bulge out: if it does, cut bulge off with sharp knife, making edges smooth and flush with end faces of pump case and cylinder block.
15. Oil pump strainer and oil pump strainer seal to cylinder block; secure with oil pump strainer bolt first and then oil pump strainer bracket bolt. Tighten oil pump strainer bolt first and then oil pump strainer bracket bolt to 11 Nm (97 inch lbs.).
16. Apply a continuous bead of GM P/N 12346240 or equivalent, to engine oil pan mating surface.
17. Engine oil pan to cylinder block; secure with fourteen bolts and two nuts starting at the center and working outward. Tighten engine oil pan bolts and nuts to 11 Nm (97 inch lbs.).
18. Timing belt guide and crankshaft timing sprocket. Install timing belt guide with concave side facing oil pump. Lock crankshaft with slotted screwdriver. Secure with crankshaft timing sprocket bolt. Tighten crankshaft timing sprocket bolt to 110 Nm (81 ft. lbs.).
19. Tensioner plate to timing belt tensioner. Insert tensioner plate lug into the timing belt tensioner hole.
20. Timing belt tensioner and tensioner plate to cylinder block; secure with one bolt and one stud. Do not tighten fully. Check to make sure that plate movement in direction of arrow causes tensioner to move in the same direction. If it does not, remove timing belt tensioner and tensioner plate and reinsert tensioner plate lug in timing plate tensioner hole.
21. Check that timing mark on camshaft timing belt pulley is aligned with V mark on cylinder head cover. If not, align the two marks by turning the camshaft but be careful not turn it more than its allowable turning range.
22. Check that punch mark on crankshaft timing belt pulley is aligned with arrow mark on oil pump case. If not, align the two marks by turning the crankshaft but be careful not turn it more than its allowable turning range.
23. Timing belt, tensioner spring, and spring damper. With two sets of marks aligned and tensioner plate pushed up, install timing belt on two pulleys in such a way that drive side of belt is free from any slack. Then install the tensioner spring and spring damper. Hand tighten tensioner stud only. When installing timing, belt with rotating direction of crankshaft. In this state, the number one piston is at top dead center of the compression stroke.
24. To take up slack in timing belt. turn crankshaft two rotations clockwise alter installing it. After making sure that belt is tree from slack tighten timing belt tensioner stud first and tensioner bolt. Tighten
- Timing belt tensioner stud to 11 Nm (97 inch lbs.).
- Timing belt tensioner bolt to 27 Nm (20 ft. lbs.).
25. Confirm again that both sets of timing marks are aligned properly. Before installing timing belt cover, make sure that seal is between coolant pump and oil pump and oil pump case.
26. Timing belt cover nut and bolts. Tighten timing belt cover nut and bolts to 11 Nm (97 inch lbs.).
27. Crankshaft timing pulley; secure with four crankshaft timing pulley bolts. Tighten crankshaft timing pulley bolts to 11 Nm (97 inch lbs.).
28. Engine wiring harness to timing belt cover. Secure with retaining clips.
29. Generator/coolant pump belt. Adjust generator/coolant pump belt tension. Tighten generator mounting bolt and nut to 23 Nm (17 ft. lbs.). See Starting and Charging.
30. Engine to vehicle.