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Cylinder Head
Camshaft Inspection
NOTE:
• Do not rotate the camshaft during inspection.
• Remove the rocker arms and rocker shafts.
1. Put the camshaft and the camshaft holders on the
cylinder head, then tighten the bolts to the
specified torque.
Specified torque:
8 m m bolts: 22 N m (2.2 k g f m , 16 Ibf ft)
6 mm bolts: 12 N m (1.2 k g f m , 8.7 Ibfft)
6 mm bolts: @ , © , @ , ©
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2. Seat the camshaft by pushing it toward the
distributor end of the cylinder head.
3. Zero the dial indicator against the end of the
distributor drive, then push the camshaft back and
forth and read the end play.
Camshaft End Play:
Standard (New): 0 . 0 5 - 0 . 1 5 m m
(0.002 - 0.006 in.)
Service Limit:
0.5 m m (0.02 in.)
4. Unscrew the camshaft holder bolts two turns at a
time, in a crisscross pattern. Then remove the
camshaft holders from the cylinder head.
5. Lift the camshaft out of the cylinder head, wipe
them clean, then inspect the lift ramps. Replace the
camshaft if any lobes are pitted, scored, or
excessively worn.
6. Clean the camshaft journal surfaces in the cylinder
head, then set the camshaft back in place. Place a
plastigage strip across each journal.
7. Install the camshaft holders, then tighten the bolts
to the specified torque as shown in step 1.
8. Remove the camshaft holders. Measure the widest
portion of plastigage on each journal.
• If the camshaft-to-holder clearance is within
limits, go to step 10.
• If the camshaft-to-holder clearance is beyond the
service limit and the camshaft has been replaced,
replace the cylinder head.
• If the camshaft-to-holder clearance is beyond the
service limit and the camshaft has not been
replaced, go to step 9.
Camshaft-to-Holder Oil Clearance:
Standard (New): 0.050-0.089 mm
(0.0020
0.0035 in.)
Service Limit:
0.15 mm (0.006 in.)
6-40
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Troubleshooting
