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301-350-400 V 8 ENGINE V I CODES Y-P-Z
6A5-17
hand (Fig. 6A5-34).
Fig.
6A5-34
Oil Pump and Oil Pump Drive Shaft
Replace
1. Position drive shaft in distributor and oil pump drive
gears.
Place pump against block, using new gasket between
pump and block.
Index drive shaft with pump drive gear shaft. Install two
attaching screws with lockwashers and tighten securely.
(Removal and installation of pump does not affect ignition
timing, since the oil pump and distributor drive gear is
mounted on the distributor shaft).
2. Install oil pan.
ENGINE OIL P U M P
Recondition
1. Remove 4 cover attaching screws, cover, idler gear
and drive gear and shaft (Fig. 6A5-35).
2. Remove pressure regulator valve and valve parts.
CAUTION: Do not disturb oil pickup pipe on
screen or body. This pipe is located at assembly.
Inspect
Should any of the following conditions be found during
inspection operations, the pump assembly should be replaced.
1. Inspect pump body for cracks or excessive wear.
2. Inspect oil pump gears for excessive wear or damage.
3. Check shaft for looseness in the housing.
4. Check inside of cover for wear that would permit oil
to leak past the ends of gears.
5. Check the oil pick-up screen for damage to screen, or
relief grommet.
6. Check pressure regulator valve plunger for fit in body.
-
Fig.
6A5-35
0 T ~ u m ~ 7
~ x ~ l o d e d
View
Replace
1. Place drive gear and shaft in pump body.
2. Install idler gear so that smooth side of gear will be
toward the cover.
3. Install cover and attaching screws. Tighten screws to
105 Ib. in. and check to see that shaft turns freely.
4. Install regulator valve plunger, spring, retainer and
pin.
CONNECTING ROD BEARING
CLEARANCE
1. After removing oil pan, remove the cap of the bearing
to be checked. Wipe the bearing and the crankpin free of oil.
2. Place a piece of plastic gage, the length of the bearing
(parallel to the crankshaft), on the crankpin or bearing
surface.
NOTE: Plastic gage should be positioned exactly in the
middle of upper or lower bearing shell. (Bearings are
eccentric and false reading could occur.)
Install the cap and tighten cap bolts to torque. (Do not
turn crankshaft with plastic gage in place).
3. Remove bearing cap and using plastic gage scale on
envelope, measure width of compressed plastic gage before
removing it from the crankpin or bearing (Fig. 6A5-36).
If the clearance is excessive, replace the bearing with the
next undersize bearing and recheck clearance. Bearings are
available in standard, .00lW and .002" undersize.
4. Rotate the crankshaft after bearing adjustment to be
sure bearings are not tight.
5. Check connecting rod end clearance between
connecting rod cap and side of crankpin. If clearance is
excessive, replace connecting rod.
M A I N BEARING CLEARANCE
1. Place a .002" brass shim between the crankshaft
journal and the lower bearing in each bearing cap next to the
one being checked. This causes the crankshaft to be forced
against the upper bearing and insures an accurate
measurement of the total clearance.
2. Remove the bearing cap of the bearing to be checked.
Wipe the bearing and the journal free of oil.
3. Place a piece of plastic gage, the length of the bearing
(parallel to the crankshaft), on the journal or bearing surface.
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