7-62
7
TIP:
Make sure to keep the parts in the order as
they were removed.
3. Remove the valve seals 4.
Checking the cylinder head
1. Eliminate carbon deposits from the com-
bustion chambers and check the cylinder
head for damage and scratches.
2. Check the cylinder head warpage using a
straightedge 1 and thickness gauge 2
in the directions shown. Replace the cyl-
inder head assembly if above specifica-
tion.
Checking the valve spring
1. Measure the valve spring free length a.
2. Measure the valve spring tilt b. Replace
if above specification.
Checking the valve
1. Check the valve face. Replace if pitted or
worn.
2. Measure the valve margin thickness a.
Replace if out of specification.
Valve spring compressor 2: 90890-04019
Valve spring compressor attachment 3:
90890-06320
4
1
2
Cylinder head warpage limit:
0.10 mm (0.0039 in)
Valve spring free length a:
48.1 mm (1.89 in)
Valve spring tilt limit b: 1.7 mm (0.07 in)
a
b
a
Cylinder head
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