Engine Mechanical: 1D-23
• Insert the valves, with their stems coated with
molybdenum oil solution all around and along the full
stem length without any break.
M/O: Molybdenum oil (MOLYBDENUM OIL
SOLUTION)
CAUTION
!
When inserting each valve, take care not to
damage the lip of the stem seal.
• Install the valve spring with the small -pitch portion “A”
facing cylinder head. “B” Large-pitch potion.
• Put on the valve spring retainer using the valve spring
compressor, press down the spring, fit the two cotter
halves to the stem end, and release the compressor
to allow the cotter (1) to wedge in between seat and
stem. Be sure that the rounded lip (2) of the cotter fits
snugly into the groove (3) in the stem end.
Special tool
(A): 09916–14510 (Valve spring compressor)
: 09916–14910 (Valve spring compressor
attachment)
: 09916–84511 (Tweezers)
CAUTION
!
Be sure to restore each spring, valve and
spring retainer to their original positions.
Cylinder Head Related Parts Inspection
B827H11406025
Cylinder Head Distortion
1) Decarbonize the combustion chamber.
2) Check the gasket surface of the cylinder head for
distortion Using a straightedge and thickness gauge.
Take clearance readings at several places. If any
clearance reading exceed the service limit, replace
the cylinder head with a new one.
Special tool
: 09900–20803 (Thickness gauge)
Cylinder head distortion
Service limit: 0.05 mm (0.002 in)
I827H1140054-02
Paint
“A”
“B”
I827H1140055-02
1
3
2
I827H1140056-01
(A)
I827H1140057-01
I827H1140058-01
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