Diagnostic Test
WARNING: This page is about a different car, the 2011 RAM Pickup and 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- CHECKING THE EXHAUST SYSTEM FOR LEAKS
- Turn the ignition off.
- Raise the vehicle in accordance with the service information.WARNING:
The normal operating temperature of the exhaust system is very high. Never work around or attempt to service any part of the exhaust system until it has cooled. Special care should be taken when working near the catalytic converter. The temperature of the converter rises to a high level after a short period of engine operating time.
- Connect the (special tool #8404-ECT, Exhaust Cone, Truck) to the Air Pressure Regulator (with hose) W-18-MIL-1146AS.CAUTION:
The air pressure must not exceed 4 psi, otherwise engine damage can occur.
- Attach shop air to the air pressure regulator.
- Adjust the Air Pressure Regulator to 4.0 psi.
- Insert the exhaust cone into the vehicle tail pipe.
- If the vehicle is equipped with dual exhaust. Use the (special tool #8404-ECT, Exhaust Cone, Truck) with equipped attached plug, plug one side of the dual exhaust pipe. Pressurize the other as described above.
- Apply Mopar Air Leak Detector or Equivalent to the following areas:
- All welded joints from 6 inches rearward of the Downstream O2 Sensor forward.
- O2 sensor seal points.
- O2 sensor boss welds.
- Flange/joint connection(s).
- Exhaust Manifold to Cylinder Head connection(s).
- EGR Solenoid gasket base and tube seal points (if equipped).
- Watch for the liquid/soapy water to bubble.
- Use the following definitions to help determine if system or component repair/replacement is necessary:
- Type 1 Leak
is defined as a leak where very small foam like bubbles (1.0 mm or less) appear.
Any Type 1 or greater leaks found in welded joints, O2 Sensor seal points or O2 Sensor boss welds must be repaired or the component must be replaced.
- Type 2 Leak
is defined as a leak where larger bubbles (pea size, 8.0 mm or greater) appear.
Any Type 2 or greater leaks found in welded joints, O2 Sensor seal points or O2 Sensor boss welds must be repaired or the component must be replaced.
Leak Location Repair required if results at 4 psi reveal bubble size: Welded joints Type 1 (1.0 mm) or greater O2 Sensor seal points Type 1 (1.0 mm) or greater O2 Sensor boss welds Type 1 (1.0 mm) or greater Flange / joint connections Type 2 (8.0 mm) or greater Exhaust Manifold to cylinder head connections Type 2 (8.0 mm) or greater EGR gasket and tube seal points Type 2 (8.0 mm) or greater - Type 1 Leak
is defined as a leak where very small foam like bubbles (1.0 mm or less) appear.
- If a leak is found that matches the above definition, repair or replace the component as necessary.
- Once the repair is complete, repeat the procedure to verify that all leaks have been repaired.
Were any exhaust leaks found?
Yes
- Repair or replace the leaking exhaust parts as necessary.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
No
- Test complete.