Service Manual

PERIODIC MAINTENANCE 2-11
Periodic Maintenance Procedures
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Coat the face of valve sparingly with a fine lapping compound.
•
Use the vacuum cup tool [A], to grip top of the valve [B]. Rotate the
valve in a circular motion to lap the valve to the seat.
•
Lift the valve slightly from the seat every 8 to 10 strokes, continue
lapping operation until a uniform ring appears around entire surface
of the valve face.
•
When lapping is completed, wash all parts in solvent to remove
lapping compound. Dry the parts thoroughly.
•
Note the position of the lapping mark on the valve face. The lapping
mark should appear on or near the center of the valve face.
•
When the engine is assembled, be sure to adjust the valve clearances
(see Valve Clearance Adjustment).
Lubrication System
Oil Level Inspection
•
Place the engine on a level surface.
•
Remove the oil filler cap [A] and wipe its dipstick [B] with a clean
cloth.
•
Insert the dipstick into tube [C] without screwing it in, then check the
oil Level.
•
The oil level should be the operating range [D] (grid area) on the
dipstick.
If the oil level is “ADD” range [E], add enough engine oil to bring oil
level to the operating range.
CAUTION
Do not add more oil above the operating range. Excess oil will
cause a smoking condition.
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Use the same type and make of oil that is already in the engine.
NOTE
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If the engine oil type and make are unknown, use any brand of the
specified oil to top up the level in preference to running the engine
with the oil level low. Then at your earliest convenience, change
the oil completely.
If the oil level is “FULL” range [F], drain the excess oil by loosening
the drain plug.