Exhaust Leak on a 400 Cummins
Can anyone tell me how to check for an exhaust leak on a diesel?? Have been hearing what sounds like an exhaust leak when driving with the window down on the highway. More noticeable when you have the...
Forum Discussion
The Cummins 400 ISL has a KNOWN problem of developing a 'leak' in the manifold area around 60,000 miles. It would be best to take it into a Cummins shop and have them check to be sure you do NOT have that developed leak as it CAN cause serious problems including fires.
