TROUBLESHOOTING
Page 83
Valve Guide Wear, Check
WEAR CHECK
1. Remove the oil seals from the valve guides.
2. Mount the cylinder head on a suitable
engine stand using the cylinder head
adapter plate J 47364.
3. Install a new valve into the guide so that the
end of the valve stem is even with the valve
guide edge.
4. Using the dial indicator 9989876 and holder
9999696, place the tip of the dial indicator
against the edge of the valve disc. Move the
valve back and forth laterally in the direction
of the intake/exhaust ports. Note the
measured value and compare it with the
acceptable wear limit specified for the
engine.
77
Figure 77 — Measuring Valve Guide Wear
5. Repeat Step 4 to check all valve guides.
Replace the valve guides if the measured
values exceed the acceptable wear limit.
1. Dial Indicator, 9989876 2. Magnetic Stand,
9999696
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