Engine - Intake Manifold Water Outlet Coolant Leak

Classification:
EM02-001

Reference:
NTB02-044

Date:
April 10, 2002

COOLANT LEAK FROM INTAKE MANIFOLD WATER OUTLET

APPLIED VEHICLES:

All 2000-02 Frontier (D22) - with VG33E engine
All 2000-02 Xterra (WD22) - with VG33E engine

SERVICE INFORMATION

If an applied vehicle exhibits:

^ Engine coolant under the vehicle when parked

^ Smell of coolant when engine is warm,





The cause may be coolant leaking between the water outlet housing and intake manifold sealing surfaces (see Figure 1). Refer to the Service Procedure to resolve this incident, should it occur.

NOTE:
A leak from the above noted area can be verified by a visual inspection.

SERVICE PROCEDURE

Install the new fiber gasket (refer to the Parts Information section) between the water outlet housing and intake manifold as follows:

CAUTION:
Be careful not to spill engine coolant on electrical connectors, drive belts, etc. when performing the following procedure.

1. Verify the coolant leak is coming from the water outlet housing/intake manifold sealing surfaces.

2. Use the valve on the lower radiator tank to drain coolant, into a clean bucket (or other clean, suitable container), to just below the level of the water outlet housing.

NOTE:
Draining the coolant below the level of the water outlet housing will minimize coolant spillage when removing the housing.

3. Remove parts necessary to access the water outlet housing.

4. Remove the water outlet housing from the intake manifold.

5. Thoroughly clean the sealing surfaces of the water outlet housing and intake manifold, making sure all old sealer is completely removed.

6. Install the new fiber gasket onto the water outlet housing as follows:

A. First, install the two mounting bolts through the holes in the water outlet housing.

B. Then, slide the fiber gasket over the bolts until it is flush against the sealing surface of the housing. The bolts will keep the gasket in place while installing the housing.

7. Install the water outlet housing to the intake manifold and tighten the bolts to 16.3 - 20.3 N-m (1.7 - 2.1 kg-m, 12 - 15 ft-lbs).

8. Re-install all components that were previously removed.

9. Re-fill the radiator:

^ With the coolant that was drained and captured in step 2

NOTE:
If additional coolant is needed, use a 50/50 mixture of Genuine Nissan Antifreeze Coolant (or equivalent) and distilled water or de-mineralized water.

^ According to the Coolant Refilling Procedure outlined in the "MA" section of the applicable Service Manual, to ensure air bubbles are purged from the cooling system

10. Run the engine and confirm there is no coolant leak(s).





PARTS INFORMATION

CLAIMS INFORMATION





Submit a Primary Failed Part (PP) line claim using the claims coding shown.