Q45 V8-4.5L (VK45DE) (2002)
8. Blow air into the hole to separate adjusting shim from valve lifter.
CAUTION: When blowing, use goggles to protect your eye.
9. Remove adjusting shim using a small screwdriver and a magnetic finger.
10. Determine replacement adjusting shim size following formula.
Using a micrometer determine thickness of removed shim with measured at center.
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 - 0.30 mm (0.0118 inch)]
Exhaust:..........N = R + [M - 0.33 mm (0.0130 inch)]
Shims are available in 64 sizes from 2.32 mm (0.0913 inch) to 2.95 mm (0.1161 inch), in steps of 0.01 mm (0.0004 inch).
Select new shim with thickness as close as possible to calculated value.
11. Install new shim using a suitable tool.
Install with the surface on which the thickness is stamped facing down.