D_Cantrell

I have been hearing a slight roaring sound from my truck, especially when the engine is cold. It changed pitch with engine speed but after it warms up it goes away. I do not hear any other noise from the truck.

Just wondering if anyone else has had this issue,

Thanks,

Dave

Blondie70

I have not heard this noise. Hope it's nothing serious.

Duro

I find my 3.7 to be quite noisy.
Most of the noise seems to come from the exhaust pipe. I havent had time to check, but I beleive the cats and muffler have drain holes and that might be where the noise comes from.

ardakota

my 3.7 does the same thing until it warms up I just think it has to do with the way the engine sets itself during warmup stage.

2011 3.7

My 3.7 does the same thing for about 3 seconds ,I just had my engine replaced at 94k so I don't know if I should be worried or not.