Crankshaft; Specifications - Chevrolet 1980 Light Duty Truck Service Manual

6A 1-30 IN LINE 6
7. Remove heater hoses from engine.
8. Remove radiator.
9. Remove fan and water pump pulley.
10. Disconnect fuel line from fuel pump.
11. Remove vehicle hood.
12. Raise vehicle.
13. Remove starter.
14. Remove flywheel or torque converter splash shield,
as applicable.
15. Disconnect exhaust pipe from exhaust manifold
flange. Wire up and out of way.
16. Remove engine mount 'through' bolts.
• If equipped with automatic transmission, remove
converter to flex plate bolts.
• If 'K ' model, remove strut rods at motor mounts.
17. Remove bell housing to engine retaining bolts.
Support transmission with chain.
18. Lower vehicle.
19. Attach engine lifting device.
20. Remove engine.
Installation (CK Series/Code D & T Engines)
1. Place engine in vehicle.
2. Raise vehicle.
3. Install bell housing to engine retaining bolts. Torque
to specifications.
• If equipped with automatic transmission, install
torque converter to flex plate attaching bolts. Torque to

specifications.

4. Install engine mount to frame retaining bolts.
Torque to specifications.
5. Connect exhaust pipe to exhaust manifold flange.
6. Install flywheel or torque converter splash shield,
as applicable.
7. Install starter. Torque bolts to specifications.
8. Lower vehicle.
9. Attach fuel line to fuel pump.
10. Install water pump pulley and fan. Torque bolts to
specifications.
11. Install radiator.
12. Connect heater hoses to engine.
13. Connect radiator hoses to radiator.
14. Connect all wiring to engine.
15. Connect accelerator cable to carburetor throttle
lever.
• If equipped with automatic transmission, connect
detent cable to throttle lever.
16. Fill cooling system.
17. Fill crankcase with oil.
18. Install vehicle hood.
19. Connect battery cables, start engine. Check timing
and carburetor adjustment. Adjust if necessary.
20. Install air cleaner.

CRANKSHAFT

Removal
1. Remove engine as previously outlined. Remove
clutch, if applicable, and flywheel and mount engine on
stand.
Fig. 6A 1-46~Sealing Bearing Cap
2. Remove the oil dipstick and oil dipstick tube.
3. Remove the spark plugs.
4. Remove crankshaft pulley and torsional damper.
5. Remove oil pan and oil pump.
6. Remove crankcase front cover.
7. Remove the connecting rod caps and push the
pistons to the top of bores.
8. Remove main bearing caps and lift cranksahft out
of cylinder block.
9. Remove rear main bearing oil seal and main
bearings from cylinder block and main bearing caps.
Cleaning and Inspection
1. Wash crankshaft
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 run-out by supporting the
front and rear main bearing journals in "V" blocks and
check at the front and rear intermediate journals with a dial
indicator. (See Specifications.)
4. Replace or recondition the crankshaft if out of
specifications.
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. Install lip and helix towards 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. 6A1-46). 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
lbs. ft. (14-16 N -m ) then tap end of crankshaft, first
APPLY
SEALANT
TO SHADED
AREAS ONLY
in solvent and dry with
LIG H T T R U C K S ER V IC E M AN UAL