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3 0 5 - 3 5 0 ENGINE
6A6-27
11. Remove rear main bearing oil seal and main bearings
from cylinder block and main bearing caps.
Cleaning and Inspection
1. Wash crankshaft in solvent and dry with compressed
air.
2. Measure dimensions of main bearing journals and
crankpins with a micrometer for out-of-round, taper or
undersize. (See Specifications.)
3. Check crankshaft for round-out by supporting at the
front and rear main bearings journals in "V" blocks and
check at the front and rear intermediate journals with a dial
indicator. (See Specifications.)
4. Revlace or recondition the crankshaft if out of
specifications.
Fig.
6A6-60
Sealing Bearing Cap and Block
Installation
1. Install rear main bearing oil seal in cylinder block and
rear main bearing cap grooves. Install with lip of seal toward
front of engine. Where seal has two lips, install lip with helix
toward front of engine.
2. Lubricate lips of seal with engine oil. Keep oil off
parting line surface.
3. Install main bearings in cylinder block and main
bearing caps then lubricate bearing surface with engine oil.
4. Install crankshaft, being careful not to damage bearing
surfaces.
5. Apply a thin coat of brush-on type oil sealing
compound to block mating surface and corresponding surface
of cap only (Fig. 6A6-60). Do not allow sealer on crankshaft
or seal.
6. Install main bearing caps with arrows pointing toward
front of engine.
7. Torque all except rear main bearing cap bolts to
specifications. Torque rear main bearing cap bolts to 10-12
ft. lbs. then tap end of crankshaft, first rearward then
forward, with a lead hammer. This will line up rear main
bearing and crankshaft thrust surfaces. Retorque all main
bearing cap bolts to specifications.
8. Measure crankshaft end play with a feeler gage. Force
crankshaft forward and measure clearance between the front
of the rear main bearing and the crankshaft thrust surface.
9. Install flywheel and torque to specifications. A wood
block placed between the crankshaft and cylinder block will
prevent crankshaft from rotating.
NOTE: Align dowel hole in flywhee: with dowel hole
in crankshaft. On vehicles equipped with automatic
transmissions, install flywheel with the converter
attaching pads toward transmission.
Remove crankshaft sprocket using Tool J 5825; install
using Tool J 5590.
Fig.
6A6-59
Sprocket or Gear Replacement
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