Oil Filter Base - Pontiac TRANS AM 1977 Service Manual

3 5 0 A N D 403 ENGINE 6A4-3
Fig. 6A4-3 Engine Lubrication System
The distributor drive gear is lubricated by oil from the
left rear oil galley.
The rocker arms and valve tips are lubricated by oil
furnished through the hydraulic lifters and hollow push-rods.
A disc valve in the lifter meters oil to the push rods.
The connecting rod bearings are oiled by constant oil
flow from passages drilled through the crankshaft connecting
the main journals to the rod journals. A groove around each
main bearing furnishes oil to the drilled crankshaft passages.
Oil returns to the oil pan reservoir from the rocker arms
through passages at each end of the cylinder heads. Oil from
the valve lifter compartment returns through clearance holes
in the lower portion of the compartment near the camshaft.
The timing chain compartment drains directly into the oil
pan.
NOTE: To check engine oil pressure see Fig. 6A4-4.
OIL FILTER BASE
(Fig. 6A4-5)
B SERIES
Removal
1. Bend exhaust manifold lock tabs away from bolts.
Fig.
6A4-4
Engine
Oil
Pressure (Typical)
2. Hoist car.
3. Disconnect exhaust system from exhaust manifold.
4. Remove exhaust manifold.