Pressure Test

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.

The Tool contains an outlet plug (B) and an inlet plug (D) to pressure test the EGR cooler.

Courtesy of NISSAN NORTH AMERICA, INC.

NOTE: Lubricate the O-rings (A) and (C) on the plugs with suitable water-based lubricant.

Tool B and D

:-- - (J-54414)
Install the outlet plug (A) into the EGR cooler outlet and install the inlet plug (B) into the EGR cooler inlet.

Courtesy of NISSAN NORTH AMERICA, INC.

Install Tool (B) and hose assembly onto the Tool (A) on the coolant outlet of the EGR cooler.

Courtesy of NISSAN NORTH AMERICA, INC.

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.

NOTE: Install a ball-type shutoff valve onto the inlet side of the air pressure regulator to allow the air supply to be shut off during testing.

Tool A	:-- - (J-54414)
Tool B	:-- - (J-54429)

Make sure the air pressure regulator and ball type valve are closed. Connect a compressed air supply to the pressure regulator.
- Apply 345 kPa (3.52 kg/cm ² , 50 psi) of air pressure to the EGR cooler.
- Inspect for air escaping the EGR cooler assembly as a result of loose lines and fittings by spraying the exterior of the EGR cooler and all lines and fittings with a mixture of mild soap and water.
Shut the air supply OFF to the regulator by using the ball valve and disconnect the compressed air supply.
Record the time at which the air supply was shut off and the air pressure shown on the air pressure regulator gauge.
Periodically check the fittings for air leaks using the mixture of soap and water. If there are any air leaks found during the test, fix the leak and start the test over.
Measure and record the air pressure after 20 minutes.
- If there is no pressure drop, the cooler is reusable.
- If the measured pressure drop is greater than 138 kPa (1.41 kg/cm ² , 20 psi), replace the EGR cooler.
- If the measured pressure drop is 138 kPa (1.41 kg/cm ² , 20 psi) or less, check all of the fittings for air leaks to make sure that no air leaks are found on the test equipment and test again.
- If the measured pressure drop is greater than 3.45 kPa (0.0352 kg/cm ² , 0.5 psi) on the second test and there are no air leaks found on the test equipment, replace the EGR cooler.

If the EGR cooler is not usable, check the following items:

Pressure check the cooling system for leaks. Leaks can be in the coolant plumbing as well as on the engine which can cause EGR cooler malfunction.
Verify there are no issues with the cooling system (coolant leaks, water pump damage, fan drive damage, or similar).
Inspect the turbocharger turbine housing for signs of coolant deposits. Coolant deposits can typically be identified as dried white deposits coating the insides of the housings.
Inspect the EGR valve inlet and outlet for signs of coolant deposits. Clean if coolant is found.
Inspect the air intake connection for coolant.
Inspect the exhaust pressure sensor tube.
If there is coolant contamination in the engine lubricating oil, change the engine lubricating oil.

NOTE:

If damage resulted in a hydraulic lock, it can be necessary to remove the injectors and evacuate the coolant from the cylinder(s).
If damage resulted in a hydraulic lock and the coolant level reached the intake manifold, it can be necessary to replace the charge-air cooler.

If the EGR cooler is reusable:

Remove the parts supplied in the service kit. Refer to INSPECTION AFTER REMOVAL ASSEMBLY and INSTALLATION.