em9al Posted October 19, 2014 Report Share Posted October 19, 2014 Hi. I have a CADILLAC SEVILLE northstar 1994 I have a noise i the engine when i put in the drive. Some hard metalic noise. The noise is there when the engine is idle. But when i thottle up the noise disappear. Link to comment Share on other sites More sharing options...
barczy01 Posted October 19, 2014 Report Share Posted October 19, 2014 How many miles are on the car? Is the noise the same when the engine is cold or hot? Link to comment Share on other sites More sharing options...
Cadillac Jim Posted October 20, 2014 Report Share Posted October 20, 2014 The first thing I would look at is the serpentine belt and anything on it. The second thing is the torque converter bolts. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
cdgrinci Posted October 20, 2014 Report Share Posted October 20, 2014 Depending on the noise: could be engine mount, transmission mount, internal transmission problem or a lot of other things; tough without more input as to frequency, intensity and kind of noise (clunk, buzz, rap, etc.). Chuck '19 CT6, '04 Bravada........but still lusting for that '69 Z-28 Link to comment Share on other sites More sharing options...
em9al Posted October 20, 2014 Author Report Share Posted October 20, 2014 Thank you all for the input. I will look in to this to day and come back. I will try to uploade a film to discribe the nois better. Link to comment Share on other sites More sharing options...
KevinW Posted October 20, 2014 Report Share Posted October 20, 2014 While the engine is off and the exhaust system is not too hot, try shaking the catalytic converter. It's possible the vibrational frequencies of the exhaust (at idle while in gear) are exciting broken pieces of ceramic substrate. ___________________________________________________ Link to comment Share on other sites More sharing options...
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