PERIODIC MAINTENANCE 2-9
TAPPET CLEARANCE ADJUSTMENT
The clearance is adjusted by replacing the existing tappet shim
by a thicker or thinner shim.
• Remove the intake or exhaust camshafts. (! 3-20)
• Remove the tappet and shim by fingers or magnetic hand.
• Check the figures printed on the shim. These figures indicate
the thickness of the shim, as illustrated.
• Select a replacement shim that will provide a clearance within
the specified range. For the purpose of this adjustment, a total
of 25 sizes of tappet shim are available ranging from 2.30 to
3.50 mm in steps of 0.05 mm. Fit the selected shim to the
valve stem end, with numbers toward tappet. Be sure to
check shim size with micrometer to ensure its size.
Refer to the tappet shim selection table (Pages 2-10 and -11)
for details.
NOTE:
* Be sure to apply engine oil to tappet shim top and bottom
faces.
* When seating the tappet shim, be sure to face figure printed
surface to the tappet.
"
• After replacing the tappet shim and camshafts, rotate the
engine so that the tappet is depressed fully. This will squeeze
out oil trapped between the shim and the tappet that could
cause an incorrect measurement, then check the clearance
again to confirm that it is within the specified range.
• After finishing the tappet clearance adjustment, reinstall the
following items.
• When installing the cylinder head cover, do not forget the gas-
ket
A.
Page
* Cylinder head cover ........................................ 3-111
* Spark plug and plug cap.................................. 2-7
* Valve timing inspection plug............................ 3-111
* Generator cover plug....................................... 3-112
Reinstall the camshafts as the specified manner.
(!3-105)
270
2.70 mm
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