scottr20ae

1.When its below about 30F, I have a loud noise coming from the center section of the engine(2.7t), sounds like it may be a pulley, but I have no idea. If I rev the engine or put it in gear and drive it gets much quieter.
Ideas?
2.Checking into what needs to be done to replace my dps/cats, we took off the CV heat shield and a piece of the underside(extra piece, ceramic? to help with heat, I assume) came off. We have the piece, but what glue should we use, or not worry about putting it back? Its about a 1 inch square piece that came off.

Thanks for any help.

pber13

describe the noise, because that makes all the difference in knowing what could be wrong

scottr20ae

I agree. Its not screaching sound like a bad belt, but more of a grinding sound.

Its been better lately, I really haven't heard it, so apparently the cold is not main cause, because its been very cold here(Atlanta), highs have been in the low 30s.