ENGINE 3-25
ENGINE COMPONENTS INSPECTION
AND SERVICE
CYLINDER HEAD COVER
DISASSEMBLY
• Remove the rocker arm shafts
1
.
• Remove the rocker arms
2
and wave washers
3
.
CYLINDER HEAD COVER DISTORTION
After removing sealant from the fitting surface of the cylinder
head cover, place the cylinder head cover on a surface plate
and check for distortion with the thickness gauge.
If the distortion exceeds the limit, replace the cylinder head
cover.
Cylinder head cover distortion
Service Limit: 0.05 mm (0.002 in)
09900-20803: Thickness gauge
ROCKER ARM SHAFT O.D.
Measure the diameter of the rocker arm shafts.
Rocker arm shaft O.D.
Standard (IN. & EX.):
11.983 – 11.994 mm (0.4718 – 0.4722 in)
09900-20205: Micrometer (0 – 25 mm)
ROCKER ARM I.D.
Measure the inside diameter of the rocker arm and check the
wear of the camshaft contacting surface.
Rocker arm I.D.
Standard
(IN. & EX.):
12.000 – 12.018 mm (0.4724 – 0.4731 in)
09900-20605: Dial calipers (10 – 34 mm)
Identify the position of each removed part. Organize
the parts in their respective groups (i.e., intake or
exhaust) so that they can be installed in their original
locations.
Содержание TU250X
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