Pontiac FIREBIRD 1972 Service Manual page 610

6-98 1972 PONTIAC SERVICE MANUAL
30. Remove old block from stand and mount new fitted
block on stand.
31. Remove each piston and pin assembly from new
block and identify for installation in original position.
This completes disassembly for fitted block replace-
ment. Proceed with assembly operations. Use new
gaskets throughout and pay special attention to
torque requirements.
ASSEMBLE
1. Install old connecting rods to proper new piston and
pin assemblies and install in cylinders from which
pistons were removed.
2. Install crankshaft and plastic gage bearings.
3. Install two timing cover mounting studs.
4. Install camshaft, using care not to damage bearings.
5. Install camshaft thrust plate indexing oiling slot in
plate with oil groove in block.
6. Make sure keys are in place in crankshaft and cam-
shaft. Install timing chain and sprockets, making sure
marks in sprockets are aligned exactly on a straight
line passing through shaft centers (Fig. 6-127 and
6-128). (Number one cylinder is now at T.D.C. in its
firing position).
Alignment can be simplified by first installing
sprockets without chain to align timing marks. If
timing chain is excessively loose, new chain or new
chain and sprockets should be used.
When installing distributor, position so that rotor is
in position to fire number one cylinder.
7. Position fuel pump eccentric bushing over eccentric
with flange toward camshaft sprocket.
8. Install fuel pump eccentric and bushing on camshaft
sprocket (all except 307 engine), indexing tang on
eccentric with keyway cut-out in camshaft sprocket.
9. Position timing cover gasket over mounting studs
and dowels on block.
10. Install timing cover, water pump, fan and pulley. Do
not install stud nuts at this time.
11. Slide harmonic balancer onto crankshaft, and install
harmonic balancer to crankshaft bolt and washer.
Place hammer handle between block and crankshaft
counterweight to keep crankshaft from turning and
tighten harmonic balancer to crankshaft bolt to 160
lb. ft. (all except 307 engine) or 60 lb. ft. (307 engine).
12. Install baffle and oil indicator tube extension.
13. Insert oil pump drive shaft with dimpled end towards
block.
14. Install oil pump gasket and oil pump.
15. Cement new gaskets to oil pan and rear main bearing
cap; use retainers to hold gasket. Install oil pan and
on all except 307 engine, tighten pan bolts to 12 lb.
ft. Tighten four rear bolts (through reinforcement
straps) to 20 lb. ft. On 307 engine, tighten all oil pan
bolts to 80 lb. in. Position flywheel housing inspec-
tion cover in place and secure with bolts.
I
16. Position new cylinder head gasket on block.
17. Position cylinder heads and exhaust manifolds on
locating pins. Install head bolts and torque to 95 lb.
ft. (all except 307 engine) or 65 lb. ft. (307 engine).
Three different length bolts are used. When inserted
in proper holes, all willproject an equalamount from
their respective bosses.
18. Install lifters in bosses from which they were
removed.
19. Install push rods in same location as originally
removed and with same end facing valve lifter.
20. Tighten rocker arm ball retaining nuts to 20 lb. ft.
21.
Install distributor as follows:
a. If not already done as explained in Step number
6, turn crankshaft to firing position of number
one cylinder (number one exhaust and intake
valve lifters both on base circles of their cam lobes
and timing mark on harmonic balancer indexed
with pointer (number one intake must have just
closed).
b. Position new distributor to block gasket on block.
c. Install distributor (without cap and wires) so that
vacuum diaphragm faces left side of engine and
rotor arm points ioward contact in cap for num-
ber one cylinder. It will also be necessary to turn
the oil pump drive shaft so it will index with
.distributor shaft.
22. Install distributor hold-down clamp and special bolt
and tighten enough to hold distributor in place.
23. Install coil.