Sentra XE L4-1.8L (QG18DE) (2000)
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Use a micrometer to determine thickness of removed shim.
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Calculate thickness of new adjusting shim so valve clearance comes within specified values.
R = Thickness of removed shim
N = Thickness of new shim
M = Measured valve clearance
Intake: N = R + [M - 0.37 mm (0.0146 inch)]
Exhaust: N = R + [M - 0.40 mm (0.0157 inch)]
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).
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Select the closest size shim to the calculated thickness. Refer to chart in "AVAILABLE SHIMS", at Engine; Specifications.
8. Install new shim using a suitable tool.
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Install with the surface on which the thickness is stamped facing down.
9. Place Tool (1) as explained in steps 2 and 3.
10. Remove Tool (2).
11. Remove Tool (1).
12. Recheck valve clearance.