Valve Adjusting

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Adjust valve clearance while engine is cold.

NOTE:

Perform adjustment by selecting the correct head thickness of the valve lifter (adjusting shims are not used).
The specified valve lifter thickness dimension is measured at room temperature.
Use specifications for hot engine for hot engine condition to confirm valve clearances.

Remove the camshaft. Refer to Removal and Installation .
Remove the valve lifter that was measured as being outside the standard specifications.
Measure the center thickness of the removed valve lifter using suitable tool (A) as shown, below.

Courtesy of NISSAN NORTH AMERICA, INC.

Use the equation below to calculate the replacement valve lifter thickness.

Valve lifter thickness calculation:	(C ₁ - C ₂ ) + t1=t
C ₁ = measured valve clearance
C ₂ = standard valve clearance
t ₁ = thickness of the removed valve lifter
t = thickness of the replacement valve lifter

The thickness of the new valve lifter can be identified by the stamp mark (A) on the reverse side (inside the valve lifter).

Courtesy of NISSAN NORTH AMERICA, INC.

NOTE: Available thicknesses of the valve lifters (B) are: 7.88 - 8.40 mm (0.3102 - 0.3307 in), in 0.02 mm (0.0008 in) increments. Refer to Camshaft .

Install the selected replacement valve lifter.
Install the camshaft. Refer to Removal and Installation .
Rotate the crankshaft a few turns by hand.
Confirm that the valve clearances are within specification.
After the engine has been run to full operating temperature, confirm that the valve clearances are within specification.

Standard

: Refer to Camshaft .