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Page 224
REPAIR INSTRUCTIONS
5. Apply a light coat of clean engine oil on the
insert surfaces and on the crankshaft main
bearing journals.
Due to the considerable weight of the
crankshaft, extreme care must be observed
during installation. No nicks, scratches,
burrs, or any other kinds of distress are
acceptable on the main bearing and/or
crankshaft journals and fillets.
6. Using a suitable lifting device, position the
crankshaft in the cylinder block.
Main Bearing Cap Installation
[212 HH]
Unfinished main bearing caps are available for
servicing of E-Tech™ engines. These are
undersize bore bearing caps for service rebore:
r
Cap, Intermediate and Front Main Bearing
(Semi-Finished), No. 223GB2131M
r
Cap, Rear and Center Main Bearing (Semi-
Finished), No. 223GB2132
SPECIAL TOOL REQUIRED
r
Magnetic Base Indicator Tool J 7872
INSTALLATION PROCEDURE
1. Clean the bore in the bearing cap and back
of the lower bearing insert.
2. Install the bearing insert in the bearing cap
bore (Figure 234). The insert must be
installed dry.
The lower bearing inserts do not have a hole or a
groove. They are stamped with the word
“LOWER.”
Do not mix the caps or inserts. The caps are
numbered from 1 through 7, front to rear.
234
Figure 234 — Main Bearing Installation (Lower)
3. Lubricate the threads of the bearing
capscrews with clean engine oil and place
capscrews in the cap holes.
4. Position the No. 1 bearing cap over the
No. 1 crankshaft journal and start the screws
in the threaded holes in the cylinder block.
5. Using a plastic-faced mallet, tap the bearing
cap down until it contacts the machined
mounting surface.
6. Tighten the screws until they contact the
bearing cap. At this time, tighten them only
finger-tight.
7. Repeat the above steps for the bearing cap
Nos. 2, 3, 5, 6 and 7. The center bearing
cap, No. 4, is installed later.
8. Tighten the bearing cap capscrews to
specification, 210 lb-ft (285 N•m), using
torque wrench J 24407, or equivalent.
1. Locating Tab
2. Bearing Insert
3. Bearing Cap
5_106_00.bk Page 224 Friday, August 4, 2000 11:17 AM
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