Usage:
start by:
a) remove engine oil cooler
b) remove fresh water pump
c) engine oil pump
d) remove oil pressure regulator valve
e) remove starters
1. Fasten a hoist and remove the prelubrication pump and motor as a unit (if so equipped). Weight is 105 lb. (47.3 kg).
2. Remove the wire harness and plate for prelubrication oil pump and motor.
3. Remove the bolts (1) that hold inspection covers to block. Remove the inspection covers (2) from each side of block.
4. Remove the nuts for main bearing caps with wrench (B). Remove the bearing cap with lower half of main bearing.
5. Use tool (A) to move out the upper half of main bearing as the crankshaft is turned in the normal direction of rotation.
NOTE: On the bearing journal that has no drilled hole, put a thin piece of fiber, hardwood or plastic against end of bearing opposite tab. Hit the bearing lightly with the above until tab of bearing is free from cylinder block. Remove the upper half of bearings.
Install Crankshaft Main
1. Use tool (A) to install upper half of bearing in cylinder block. The bearing with oil hole is upper half.
NOTE: Install the main bearing dry when the clearance checks are made. Put clean engine oil on the main bearings for final assembly.
2. Clean main bearing caps and install lower halves of bearings in caps.
NOTE: When the bearing clearance is checked with the engine in the normal position, such as in the vehicle, the crankshaft will have to be lifted up and hel against the upper halves of the main bearings to get a correct measurement with Plastigage. Plastigage will not hold the weight of the crankshaft and give a correct indication. Do not turn crankshaft when Plastigage is in position to check clearance.
3. Use Plastigage (C) to check bearing clearance. Install caps and tighten both nuts with tool (B) to 200 ± 10 lb.ft. (270 ± 14 N·m). Put a mark on nuts and end of studs. Tighten nuts 120° from the mark. Remove caps and check width of Plastigage (C) to find bearing clearance. Bearing clearance must be .0048 to .0090 in. (0.122 to 0.229 mm) for new parts. Maximum permissible clearance for used parts is .015 (0.38 mm).
4. Remove upper half of bearing with tool (A). Put clean oil on the bearing surfaces and install the upper half of bearing with tool (A).
5. Put clean oil on the lower half of bearings in caps.
NOTE: Main bearing caps have numbers as to their location in cylinder block. Install bearing caps so the number on cap is same as number on cylinder block. Both numbers must be on same side of cylinder block.
6. Put 2P2506 Thread Lubricant on threads of studs and seat for nut. Install main bearing caps and nuts. Install thrust plates on dowels on rear cap. The dowels must not be extended more than .160 in. (4.06 mm) from counterbore face of bearing cap. Tighten nuts with wrench (B) to 200 ± 10 lb.ft. (270 ± 14 N·m). Put a mark on nuts and ends of studs. Tighten nuts an extra 120° from mark.
7. Use indicator group (D) to check end play of crankshaft as controlled by thrust plates. End play with new parts must be .008 to .021 in. (0.20 to 0.53 mm). Maximum permissible end play with used parts is .035 in. (0.89 mm).
8. Install the inspection covers. Install the wire harness and plate for prelubrication oil pump. Fasten a hoist and install prelubrication oil pump and motor as a unit (if so equipped).
end by:
a) install oil pump
b) install fresh water pump
c) install engine oil cooler
d) install oil pressure regulator valve