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CYLINDER HEAD
CHECKING THE CYLINDER HEAD
1. Eliminate:
• Carbon deposits (from the combustion
chambers)
Use a rounded scraper.
Do not use a sharp instrument to avoid damag-
ing or scratching:
• Spark plug threads
• Valve seats
2. Inspect:
• Cylinder head
Scratches/damage → Replace.
Replace the titanium valves with the cylinder
head.
Refer to"CHECKING THE VALVE".
3. Measure:
• Cylinder head warpage
Out of specification → Resurface.
Warpage measurement and resurfacing
steps:
a. Place a straightedge and a feeler gauge
across the cylinder head.
b. Use a feeler gauge to measure the warpage.
c. If the warpage is out of specification, resur-
face the cylinder head.
d. Place a 400–600 grit wet sandpaper on the
surface plate, and resurface the head using
a figure-eight sanding pattern.
To ensure an even surface rotate the cylinder
head several times.
INSTALLING THE CYLINDER HEAD
1. Install:
• Timing chain guide (intake side) "1"
• Dowel pin "2"
• Cylinder head gasket "3"
• Cylinder head "4"
While pulling up the timing chain, install the tim-
ing chain guide (intake side) and cylinder head.
2. Install:
•Washer "1"
• Bolts "2"
Installation steps:
Tighten the cylinder head using the rotation
angle procedure to obtain uniform tighten-
ing torque.
Cylinder head warpage:
Less than 0.05 mm (0.002 in)