Tacoma Regular Cab 4WD L4-2.7L (3RZ-FE) (1999)
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Remove the adjusting shim with a small screwdriver and magnetic finger.
b. Determine the replacement adjusting shim size by these Formula or Charts:
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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 the 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 inch))
Exhaust: N = T + (A - 0.30 mm (0.012 inch))