3.22
ENGINE
Camshaft Inspection
1. Visually inspect each cam lobe for wear, chafing or
damage.
2. Thoroughly clean the cam shaft, making sure the oil feed
holes are not obstructed.
3. Measure height of each cam lobe using a micrometer.
Compare to specifications.
4. Measure camshaft journal outside diameter (O.D.)
5. Measure ID of camshaft journal bore.
Calculate oil clearance by subtracting journal OD from journal
bore ID. Compare to specifications.
NOTE: Replace camshaft if damaged or if any part is
worn past the service limit.
NOTE: Replace cylinder head if camshaft journal
bore is damaged or worn excessively.
Cylinder Head Removal
1. Remove the two 6mm flange bolts (A) from cylinder head.
See exploded view on next page.
2. Loosen each of the four cylinder head bolts evenly 1/8 turn
each time in a criss-cross pattern until loose.
3. Remove bolts (B) and tap cylinder head lightly with a
plastic hammer until loose.
IMPORTANT: Tap only in reinforced areas or on thick
parts of cylinder head casting to avoid damaging the
thread.
4. Remove cylinder head and head gasket.
Cam Lobe Height (Intake & Exhaust):
Std: 1.2884-1.2924” (32.726-32.826 mm)
Limit: 1.2766” (32.426 mm)
Camshaft Journal O.D.:
Mag & PTO End: 1.4935-1.4941”
(37.935-37.950 mm)
Camshaft Journal I.D.:
Mag & PTO End: 1.4963-1.4970”
(38.005-38.025 mm)
Lubrication holes
Lobe height
Journal O.D.
Journal
Camshaft Oil Clearance:
Std: .0022-.0035” (.055-.090 mm)
Limit: .0039” (.10 mm)
B
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