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CYLINDER HEAD, CYLINDER AND PISTON
EC474000
INSPECTION
EC474101
Cylinder head
1. Remove:
9
Carbon deposits
Use a rounded scraper 1.
NOTE:
Take care to avoid damaging the spark plug
threads. Do not use a sharp instrument. Avoid
scratching the aluminum.
2. Inspect:
9
Cylinder head water jacket
Crust of minerals/Rust
9
Cylinder head warpage
Out of specification ¡ Re-surface.
Warpage measurement and re-surface-
ment steps:
9
Attach a straightedge 1 and a thickness
gauge 2 on the cylinder head.
9
Measure the warpage.
Warpage limit:
0.03 mm(0.0012 in)
9
If the warpage is out of specification, resur-
face the cylinder head.
9
Place # 400~600 grit wet sandpaper 3 on
the surface plate, and re-surface the head
4 using a figure-eight sanding pattern.
NOTE:
Rotate the cylinder head several times to
avoid removing too much material from one
side.
EC474200
Cylinder
1. Remove:
9
Carbon deposits
Use a rounded scraper 1.
NOTE:
Do not use a sharp instrument. Avoid scratching
the aluminum.
4-20
ENG
¡ Remove.
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