wsm M6060, Workshop Manual

Page: 218 / 639

ENGINE M6060, M7060, WSM
1-S57
Cylinder Head Flaw
1. Prepare an air spray red check.
2. Clean the surface of the cylinder head with detergent (2).
3. Apply some red permeative liquid (1) on the cylinder head
surface. After you apply, do not touch it for 5 to 10 minutes.
4. Clean away the red permeative liquid on the cylinder head
surface with detergent (2).
5. Apply the white developer (3) on the cylinder head surface.
6. If you found a red flaw, replace the cylinder head.
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Valve Recessing
1. Clean the cylinder head surface, valve face and valve seat.
2. Set the valve into the valve guide.
3. Measure the valve recessing with a depth gauge.
4. If the measurement is more than the allowable limit, replace the
valve. If it stays more than the allowable limit after you replace
the valve, replace the cylinder head.
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Valve Lapping
1. Apply the compound equally to the valve lapping surface.
2. Put the valve into the valve guide. Lap the valve on its seat with
a valve lapping tool.
3. After you lap the valve, clean away the compound and apply oil,
then lap the valve again with oil.
4. Apply Prussian Blue to the contact surface to measure the
seated rate. If the seated rate is less than 70 %, lap the valve
again.
IMPORTANT
• After you complete the valve lapping and assemble the
valve, examine the valve recessing and adjust the valve
clearance.
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(1) Red Permeative Liquid
(2) Detergent (3) White Developer
Valve recessing
Factory specification
(recessing)
0.65 to 0.85 mm
0.026 to 0.033 in.
Allowable limit
(recessing)
1.20 mm
0.0472 in.
(1) Cylinder Head Surface (A) Recessing
(B) Protrusion
(1) Good
(2) Bad (3) Bad
KiSC issued 08, 2013 A