Pontiac FIREBIRD 1972 Service Manual page 545

SIX CYLINDER ENGINE 6-33
14. Install the radiator as described in Section 6A and fill
cooling system.
15. Install grille assembly.
16. Start engine and check for leaks.
17. Check and adjust timing.
.
OIL PAN
REMOVE
1. Remove upper radiator shield assembly.
2. Disconnect negative battery cable.
3. Raise vehicle and drain crankcase.
CAMSHAFT BEARINGS
REMOVE
Camshaft bearings can be replaced while the engine is
disassembled for overhaul, or without complete disassem-
bly of the engine after camshaft and flywheel have been
removed.
With camshaft and flywheel removed, drive out ex-
pansion plug from rear cam bearing by driving from
inside.
Use Tool 5-21473-1 to drive out front bearing toward
rear and rear bearing toward front.
Install extension 5-21054 on installer 5-21473-1 and
drive center two bearings out toward rear (Fig. 6-51).
REPLACE
1. Install each new bearing on tool.
2. Install bearings reversing removal procedure.
CAUTION: The front bearing must be driven
approximately l/8" behind front of cylinder
block to uncover oil hole to timing gear oil
nozzle. Align bearing oiling holes with block
oiling holes and install new expansion plug.
4. Disconnect exhaust pipe at manifold.
5. Remove starter and set to one side.
6. Remove flywheel housing inspection cover.
7. Install engine lift' support tool (5-23515-1) and
adapter J 235 15-3 and after wrapping chains around
frame (Fig. 6-19), raise engine to remove weight from
engine mounts; remove both frame bracket to engine
mount through bolts.
On XSeries models, it may be necessary to add wash-
ers between adapter and harmonic balancer to pro-
vide initial clearance between adapter and frame.
8. Remove right front engine insulator.
9. Remove oil pan bolts; raise engine just enough to
allow oil pan removal.
CAUTION: Do not exceed 35 16.
ft. torque on
liftig tool screw.
REPLACE
1. Thoroughly clean all gasket sealing surfaces. Remove
and clean oil pump pick-up screen.
2. Install rear oil pan gasket in rear main bearing cap.
3. Install front oil pan gasket on timing gear cover
pressing tips into holes provided in cover.
4. Install side gaskets on oil pan using grease as a re-
tainer.
'
5. Install oil pan. (Bolts into timing gear cover should
be installed last. They are installed at an angle and
holes line up after rest of pan bolts are snugged up).
I I
Fig. 6-5 1 Removing Center Camshaft Bearings
6. For remainder of installation, reverse steps 1 through
9 of removal.