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SECTION 10
INSPECTION AND RECONDITIONING
Fillet Intersections
TAPPET CLEARANCE CHANGE
SINE
Nee
All M18 and M20 engines and short blocks, Serial No.
1816500656 and later, are being built with a new cam-
shaft and tappets. In addition to the new parts, new
valve to tappet cold clearances apply.
To service the camshaft (and tappets) in engines
with Serial No. 1816500646 and earlier, camshaft kit
82 755 09 is available,
The Fillet Must
Blend Smoothly
With The Bearing
Journal Surtace
45°
Minimum
This Fillet Area
Must Be
Completely Smooth
Figure 10-18.
Crankpin Fillets.
Serial No.
New Parts
Replace
Service With
1816500656 and later
52 012 08 Camshaft
52 012 07 Camshaft
52 012 08 Camshaft
52 019 02 Tappet (4)
52 019 03 Tappet (4)
52 019 02 Tappet (4)
1816500646 and earlier
| ^
------------
| | -----------
| 82 755 09 Camshaft Kit!
"Сатпай kit 82 755 09 contains the 52 012 08 camshaft and 52 019 02 tappets (4).
Valve to Tappet Cold Clearance
Intake
-003/.006 in.
.011/.014 in.
52 012 07 Camshaft
2003/.006 in.
52 019 03 Tappets
When installing the camshaft from the 82 755 09 kit,
make sure the new tappets are also installed. The
З
Small Diameter
new camshaft cannot be used with the original
Drift Punch
52 019 03 tappets.
Set the valve to tappet clearance
as specified above.
Engines Equipped With:
52 012 08 Camshaft
52 019 02 Tappets
:016/.019 in.
NOTE:
The engine must be co/d when setting valve
to tappet clearance.
OIL PUMP
Inspection and Service
Check oil pump gear for any cracked, chipped, or
badly worn teeth. Replace gear if any of these prob-
lems exist. See Figure 10-19 for oil pump gear
removal.
Figure 10-19.
Removing the Oll Pump Gear.
10.14
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