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:

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.
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.

Clean the sprockets, tension guides, and slack guides with solvent and dry with compressed air.
Coat the components with clean engine oil. Cover with a clean cloth to prevent contamination.
Do not clean the chains or tensioners with solvent or submerge in a wash tank.
Do not disassemble the tensioner. Cleaning and inspection should take place with the Tool in place. Wipe the tensioners down with a clean towel. Inspect for contamination.

Tool

:-- - (J-54418)

Timing Chains

Inspect the chains for broken links and other damage.
Check that the links move freely.
If damage is found, replace the chain.
Discoloration or sharp edges indicate over-heating. Over-heating can be caused by low oil pressure, excessive oil pressure, excessive chain tension, or improper assembly of the chain drive system.
If cleaning is required, the chains can be cleaned with a brush and clean engine oil. If the chains will not be reused immediately coat the chains in clean engine oil and place in a container to prevent contamination.

Timing Chain Tensioners

Inspect the oil pump tensioner/guide assembly for damage.
Inspect the fuel pump and camshaft tensioners for damage and proper operation.
Inspect the chain tensioner housings for cracks.
If any of the tensioners are damaged, replace the tensioner.

Sprockets

Inspect the sprockets for broken or bent teeth, cracking, wear, warpage, or other damage.
Polishing at the valley of the teeth is normal.
If any of the sprockets are damaged, replace the sprocket.

Tension Guides and Slack Guides

Inspect the guides, arms, and pivots for galling, cracks or excessive wear. Replace if damage is present.

Oil and Fuel Pump

Inspect the lubricating oil pump (2) and fuel pump (1) drive shafts.

Courtesy of NISSAN NORTH AMERICA, INC.
If damage is suspected, remove the pumps for further inspection. Refer to Exploded View (OIL PUMP) or Exploded View (FUEL PUMP).

Crankshaft

Inspect the crankshaft (1) for damage.

Courtesy of NISSAN NORTH AMERICA, INC.
Discoloration of the crankshaft nose is normal.
If the dowel pins (A) are bent or missing, the crankshaft must be replaced. Refer to Exploded View .

NOTE: If any components in the chain drive are damaged, inspect the lubricating oil system for debris and address any progressive damage.