Chevrolet 1980 Light Duty Truck Service Manual page 485

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. 6A4-60). Do not allow sealant 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
lbs. ft. (14-16 N -m ) 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.
• Align dowel hole in flywheel with dowel hole in
crankshaft. On vehicles
transmissions, install flywheel with the converter attaching
pads towards transmission.
SM ALL BLOCK 6 A 4 -33
equipped with automatic
LIG H T T R U CK SER V IC E M AN UAL