LS 400 V8-4.0L (1UZ-FE) (1990)
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Using a micrometer, measure the thickness of the removed shim.
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Calculate the thickness of a new shim so that the valve clearance comes within specified value.
T ........................................................................................................................................................................................ Thickness of used shim
A ................................................................................................................................................................................... Measured valve clearance
N ........................................................................................................................................................................................ Thickness of new shim
Intake N = T + (A - 0.20 mm (0.008 in.))
Exhaust N = T + (A -0.30 mm (0.012 in.))
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Select a new shim with a thickness as close as p05sible to the calculated values.
HINT: Shims are available in seventeen sizes 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.
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Place a new adjusting shim on the valve lifter.
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Press down the valve lifter with SST (A), and remove SST (B).
SST 09248-55011
(d) Recheck the valve clearance.
7. REINSTALL CYLINDER HEAD COVERS
8. RECONNECT HIGH-TENSION CORDS TO SPARK PLUGS
9. REINSTALL NO.3 TIMING BELT COVERS