Crankshaft With Bearings And Seal - Pontiac TRANS AM 1977 Service Manual

151 ENGINE
6A2-23
17. Disconnect transmission filler tube support and
starter wire harness.
18. Remove front motor mount bolts.
19. Lower vehicle.
20. Using jack and block of wood, support transmission.
21. Support weight of engine with chaio fall.
22. Remove two remaining bell housing bolts.
23. Raise transmission slightly.
24. Position engine forward to free it from transmission;
remove from car by tilting front of engine up.
25. Install engine on stand.
Replace
1. Install engine lifting equipment to engine and lower
engine into chassis, guiding engine to align with bell housing.
2. With engine supported by lifting equipment, install
two upper bell housing bolts.
CAUTION: Do not lower engine completely
while jack is supporting transmission.
3. Remove transmission support jack.
4. Lower engine and remove lifting equipment.
5. Raise vehicle.
6. Install remaining bell housing bolts.
7. Replace front motor mount bolts.
8. For remaining installation procedures, reverse steps
1 through 18.
CRANKSHAFT
Remove
1. Remove engine from vehicle.
2. Mount engine on suitable stand.
3. Remove spark plugs.
4. Remove fan pulley.
5. Remove hub.
6. Remove oil pan and oil pump assembly.
7. Remove timing gear cover.
8. Remove crankshaft timing gear.
9. Remove connecting rod bearing caps with bearings
and identify each for reinstallation.
10. Push connecting rod and piston assemblies away
from crankshaft.
11. Remove main bearing caps with bearings and
identify for reinstallation.
12. Remove crankshaft.
Replace
1. With new upper bearings and rear oil seal installed
position crankshaft in block.
2. Install main bearing caps (with new lower bearings
and seal), but do not tighten cap bolts.
3. Pull connecting rods (with new upper bearings
installed) and pistons into place.
4. Install rod bearing caps (with new bearings), but do
not tighten nuts.
5. With rubber mallet hit both ends of crankshaft to
center thrust bearing rearward first
-
then forward last.
Fig.
6A2-54
Crankshaft With Bearings and Seal
6. Tighten main bearing caps then check crank end play.
It should be between .0015 and ,0085.
7.
Tighten connecting rod bearing caps.
8. Recheck bearing clearances using plastic gage method.
9. Install key from old crankshaft keyway in new
crankshaft.
10. Install crankshaft timing gear.
IMPORTANT: ALIGN TIMING MARKS ON
TIMING GEARS BY ROTATING CRANKSHAFT
I F NECESSARY
11. Install timing gear cover using new seal and gaskets.
12. Install oil pump assembly and oil pan using new rear
seal in rear main bearing cap and new front seal on timing
gear cover. Press front seal tips into holes in timing gear
cover.
13. Coat front cover oil seal contact area of hub with oil
and push hub into position.
14. Install fan pulley and fan.
15. Install spark plugs.
16. Remove engine from stand.
17. Install engine in vehicle.