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Intake and exhaust valve guides are different. In-
take valve guide has a longer chamfer.
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1. Longer chamfer on intake valve guide
Clean the valve guide bore before installing the
NEW valve guide into cylinder head.
NOTE: Apply Molykote G-n (P/N 420 297 433) on
valve guide and in valve guide bore, prior to install
it into the cylinder head.
Use the valve guide installer (P/N 529 036 075) to
install valve guide.
529036075
CAUTION: Push valve guide in the cold cylin-
der head as per following illustration.
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1. Valve guide installer
2. Valve guide
3. Thrust surface of cylinder head
A. Measurement from thrust surface to valve guide top
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Subsection 07 (CYLINDER HEAD/CYLINDER)
VALVE GUIDE MEASUREMENT "A"
NEW
Valve has guide to be adjusted in diameter by us-
ing a reamer.
NOTE: Ensure to turn reamer in the right direc-
tion. Use cutting oil and make brakes to clean
reamer/valve guide from metal shavings.
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A. Valve guide diameter
VALVE GUIDE DIAMETER
INTAKE AND EXHAUST VALVE
NEW
NOTE: After valve guide installation, ensure valve
seats properly against cylinder head. Refer to
VALVE INSPECTION
CYLINDER
Cylinder Removal
For cylinder removal refer to
MOVAL
above.
NOTE: If the cylinder head does not have to be
disassembled, do not separate cylinder head from
cylinder.
Cylinder Inspection
Check cylinder for cracks, scoring and wear ridges
on the top and bottom of the cylinder.
Cylinder Taper
Measure cylinder bore and if it is out of specifica-
tions, replace cylinder and piston ring set.
Measure cylinder bore at 3 recommended posi-
tions. See the following illustration.
Section 03 ENGINE
13.10 to 13.50 mm
(.5157 to .5315 in)
6.006 to 6.018 mm
(.2365 to .2369 in)
in this section.
CYLINDER HEAD RE-
107
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Troubleshooting
