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 Bearings
1. Put clean engine oil on bearing surfaces of upper halves of bearings. Use tool (A) to install upper half of bearing in cylinder block. The bearing with oil hole is upper half.
2. Clean main bearing caps and install lower halves of bearings in caps.
TYPICAL EXAMPLE
NOTE: When the bearing clearance is checked and the engine is in a vertical position, such as in the vehicle, the crankshaft will have to be lifted up and held against the upper halves of the main bearings to get a correct measurement with wire (C). The wire will not hold the weight of the crankshaft and give a correct indication. If the engine is in a horizontal position, such as on an engine stand, it is not necessary to hold the crankshaft up. Do not turn crankshaft when lead wire is in position to check clearance. If lead wire is not available, PLASTIGAGE can be used to check bearing clearance.
3. Use wire (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 thickness of wire (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).
TYPICAL EXAMPLE
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.
4. Put clean engine oil 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.
5. Use indicator group (D) to check end play of crankshaft as controlled by thrust plates. End play with new parts must be .005 to .021 in. (0.13 to 0.53 mm). Maximum permissible end play with used parts is .035 in. (0.89 mm).
6. 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