REPAIR INSTRUCTIONS, PART 1
Page 197
The hole in the upper bearing insert must line up
with the drilled hole in the cylinder block or the
bearing will fail due to lack of lubrication. The
upper bearing insert is stamped on the back with
the word “UPPER.” Failure to heed this caution
may result in severe component damage.
252
Figure 252 — Main Bearing (Upper)
3. Place the upper crankshaft main bearing
inserts in the cylinder block journals making
sure that the locating tabs fit in the notch in
the bore.
Make sure each bearing is installed in its correct
location. Failure to heed this caution may result in
severe component damage.
4. Apply a light coat of clean engine oil on the
bearing surfaces and on the crankshaft main
journals.
Due to the considerable weight of the crankshaft,
extreme care must be observed during
installation. No nicks, scratches, burrs or other
kinds of distress on the bearings, bearing caps,
crankshaft journals and fillets are acceptable.
Failure to heed this caution may result in severe
component damage.
5. Using the crankshaft lifting tool, J 49002,
position the crankshaft in the cylinder block.
Main Bearing Cap Installation
[212 HH]
PROCEDURE
1. Clean the bore in the bearing cap and back
of the lower bearing.
2. Install the bearing in the bearing cap. The
bearing must be installed dry.
The lower bearings do not have a hole or a
groove. They are stamped with the word
“LOWER.”
The caps are numbered from 1 through 7, front to
rear. Do not mix the caps and bearings. Failure to
heed this caution may result in severe component
damage.
253
Figure 253 — Main Bearing Cap Installation (Lower)
3. Lubricate the threads of the screws with
clean engine oil and insert in the caps.
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 mallet, tap the bearing cap
down until it contacts the machined
mounting surface.
1. Locating Tab 2. Bearing
1. Locating Tab
2. Bearing Insert
3. Bearing Cap
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