EM0494
EM
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6
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ENGINE MECHANICAL
VALVE CLEARANCE
509
Author:
Date:
1996 LAND CRUISER (RM451U)
S
Using SST (A), press down the valve lifter and place
SST (B) between the camshaft and valve lifter
flange. Remove SST (A).
SST
09248
−
06020, 09248
−
55050 (09248
−
05510)
HINT:
S
Apply SST (B) at slight angle on the side marked with ”11”,
at the position shown in the illustration.
S
When SST (B) is inserted too deeply, it will get pinched by
the shim. To prevent it from being stuck, insert it shallowly
from the outside of the cylinder head, at a slight angle.
S
Remove the adjusting shim with a small screwdriver and
magnetic finger.
(b)
Determine the replacement adjusting shim size by follow-
ing the Formula or Charts:
S
Using a micrometer, measure the thickness of the
removed shim.
S
Calculate the thickness of a new shim so that the
valve clearance comes within specified value.
T ....... Thickness of removed shim
A ....... Measured valve clearance
N ....... Thickness of new shim
Intake: N = T + (A
−
0.20 mm (0.008 in.))
Exhaust: N = T + (A
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0.30 mm (0.012 in.))
S
Select a new shim with a thickness as close as pos-
sible to the calculated value.
HINT:
Shims are available in 17 sized in increments of 0.05 mm
(0.0020 in.), from 2.50 mm (0.0984 in.) to 3.30 mm (0.1299 in.).
(c)
Install a new adjusting shim.
S
Place a new adjusting shim on the valve lifter.
S
Using SST (A), press down the valve lifter and re-
move SST (B).
SST
09248
−
06020, 09248
−
55050 (09248
−
05510)
(d)
Recheck the valve clearance.
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Version 1.00 - 12/21/2010