Section 02 ENGINE
Subsection 10 (CYLINDER HEAD)
1
R1503motr255A
TYPICAL
1. Punch
Check valve guide bore for abreased material.
The inlet and exhaust valve guides have the same
length and are interchangeable.
NOTE:
If valve guide has caused scoring during
extraction, replace the cylinder head.
Grease the bore in cylinder head and the leading
end of valve guide with
MOLYKOTE G-N (P/N 420
297 433)
.
3
R1503motr256A
1
2
TYPICAL
1. Valve guide leading end
2. Cylinder head bore
3. Jig
With the
VALVE GUIDE PUSHER (6 MM) (P/N 529 036
087)
, press the valve guide into the
COLD
cylinder
head as shown.
A
R1503motr257A
TYPICAL
A. Protrusion
VALVE GUIDE PROTRUSION
MINIMUM
12.4 mm (.4882 in)
MAXIMUM
12.8 mm (.5039 in)
NOTE:
After installing new guides, they must be
reamed with a standard 6 mm reamer tool. These
are available from various tool suppliers.
Clean cylinder head carefully. Check that the valve
seat is concentric with the new guide axis (check
contact surface with engineer's blue).
smr2009-025
147
Summary of Contents for GTX Limited iS 255 2009
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