Crankshaft Installation - Winnebago 1987-1989 LeSharo Service Manual

ENGINE OVERHAUL & REBUILD
REASSEMBLE CYLINDER BLOCK ASSEMBLY
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CRANKSHAFT INSTALLATION
• Clean the main bearing upper insert surfaces in
the cylinder block and install the replacement
upper bearings.
NOTE: All the upper bearings have lubrication holes.
• Position the crankshaft in the cylinder block,
lubricate and install main bearing caps numbers
two (2), three (3) and four (4) with the
replacement lower bearings in place.
• Insert and tighten the main bearing cap bolts to
8.8 - 9.8 daNm (65-72 Ib.lft.).
• Use a beam type torque wrench.
• Install the number one (1) main bearing cap (with
a replacement lower bearing) without the side
seals.
• Position a dial indicator (with a magnetic base) on
the number one (1) main bearing cap.
• Measure the crankshaft end-play.
• The end-play should be within 0.13-0.30 mm
(0.005-0.012 in)
• If not correct, replace the thrust bearings as
necessary to obtain the correct end-play.
• Install the number five (5) main bearing cap (with
a replacement lower bearing).
• Insert and tighten the main bearing cap bolts to
8.8 - 9.8 daNm (65-72 Ib.lft.) torque. Start with the
center pair and move alternately outward as you
tighten.
• Use a beam type torque wrench.
CAUTION
Be sure to mount the thrust bearings correctly. Oil
grooves must face the crankshaft thrust surface.
Make sure the locator pins seat into the holes
provided in the upper bearings in the upper half of
the block.
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