Altima XE L4-2.4L (KA24DE) (1999)
7. Remove adjusting shim using a small screwdriver and a magnetic finger.
8. Determine replacement adjusting shim size as follows:
a. Using a micrometer, determine thickness of removed shim.
b. 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 - 0.35 mm (0.0138 inch)]
Exhaust: N = R + [M - 0.37 mm (0.0146 inch)]
c. Select new shim with thickness as close as possible to calculated value.