Previa Van DX 4WD L4-2438cc 2.4L DOHC SC MFI (1997)
Adjusting Shim Selection Chart (Exhaust)
(b) Determine the replacement adjusting shim size according to the 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 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))
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Select a new shim with a thickness as close as possible to the calculated value.
NOTE: Shims are available in 17 sizes in increments of 0.05 mm (0.0020 inch), from 2.50 mm (0.0984 inch) to 3.30 mm (0.1299 inch).