Pontiac Fiero 1988 Service Manual page 286

GENERAL ENGINE MECHANICAL 6A-9
1 — LENGTH OF
GEAR
2— DIAMETER
OF GEAR
G20017-6A
Figure 19 Measuring Oil Pump Gears
[ i n CHICK CLEARANCE BETWEEN GEAR TEETH AND SIDE
— WALL
G34167-6A-BG
Figure 20 Measuring Gear Side Clearance
L n
1 J CHECK CLEARANCE BETWEEN STRAIGHT EDGE
& GASKET
G 3 4 1 6 9 - 6 A B G
Figure 21 Measuring Oil Pump End Clearance
Chipping
Galling
1.
2.
3.
4.
5.
6.
Excessive Wear
Measure
Oil pump gears for:
Inner gear tip clearance. Max. .152
mm (.006"). See Figure 22.
Outer gear diameter clearance. .203
mm - .381 mm (.008" - .015"). See
Figure 23.
Gear end clearance (gear drop in
housing). .025 mm - .089 mm (.001"
- .0035"). See Figure 24.
Assemble
Lubricate gears with clean motor oil.
Assemble gears in housing.
Pack pump cavity with petroleum jelly.
Install pump cover and tighten bolts to 11 N*m
(97 lb. in.).
Install pressure regulator valve spring and valve.
Install oil filter adapter using a new gasket.
Tighten
Oil filter adapter bolts to 41 N-m (30 lb. ft).
Clean
Oil pump intake screen
Oil pan
-•4- Install or Connect
• Oil pan
m Engine oil filter
• Fill crankcase with clean engine oil
Inspect
Remove oil pressure sending unit and install an
oil pressure gage.
Start engine and observe oil pressure.
N O T I C E :
If the oil pressure does not build up
almost immediately, remove the oil pan and check
oil pump suction pipe attachment to the pump. If
necessary, dismantle the oil pump, fill all cavities
with petroleum jelly and reassemble. Running the
engine without measurable oil pressure will cause
extensive damage.
Check for bearing knock. If necessary, dismantle
and check for adequate oil supply and proper
clearances.
C O i N E C T i i G ROD AND MAIN BEARINGS
Engine bearings are of the precision insert type.
They are available for service use in standard and
various undersizes (Figure 25).
R e p l a c e m e n t
Depending upon crankshaft condition, bearings
may be replaced in the car or the engine must be
removed. If the engine must be removed, follow the