Inspection After Removal

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

When using compressed air for cleaning, to avoid the risk of personal injury from flying debris and dirt:
- Do not exceed 207 kPa (2.111 kg/cm ² , 30 psi).
- Wear appropriate eye protection and protective clothing including gloves.
To avoid the risk of injury to eyes and skin, when using caustic solutions, solvents, acids, or alkaline materials follow the manufacturer-s recommendations for use and wear appropriate eye protection and protective clothing. Some of these materials are also flammable. To avoid risk of fire or burns, never smoke or allow sparks or flames (such as pilot lights, electrical switches, or welding equipment) in the work area. Avoid spilling onto a hot exhaust manifold which can cause a fire.

Clean the rocker arms with solvent.
CAUTION: Do not submerge the rocker arms in water or solvent.
Dry with compressed air.
Inspect the rocker arms for cracks and excessive wear on contact points, such as the hydraulic lash adjuster cup, roller, and valve stem contact area.
Check that the roller spins freely and does not bind.
If the roller does not spin freely or there is damage or excessive wear to the rocker arm, the rocker arm must be replaced.
Lubricate the rocker arm contact points and roller with clean engine oil.