Sentra XE L4-1597cc 1.6L DOHC MFI (GA16DE) (1997)
7. Use a micrometer to determine thickness of removed shim to determine the replacement adjusting shim size using the following formula. Calculate
thickness of new adjusting shim so valve clearance comes within specified values.
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Intake: N = R + [M - 0.37 mm (0.0146 inch)].
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Exhaust: N = R + [M - 0.40 mm (0.0157 inch)].
R = Thickness of removed shim
N = Thickness of new shim
M = Measured valve clearance
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Shims are available in 50 sizes from 2.00 mm (0.0787 inch) to 2.98 mm (0.1173 inch), in steps of 0.02 mm (0.0008 inch). Select the closest
size shim to the calculated thickness.
8. Using a suitable tool, install new shims with the surface on which the thickness is stamped face down.
9. Place camshaft pliers (tool A) as explained in steps 2 and 3.
10. Remove lifter stopper (tool B).
11. Remove camshaft pliers (tool A).
12. Recheck valve clearance.
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For Checking
The (hot) intake valve clearance is 0.21 - 0.49 mm (0.008 - 0.019 inch).
The exhaust clearance is 0.30 - 0.58 mm (0.012 - 0.023 inch).
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For Adjusting