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Rattling cat.


STS Scott

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A few days ago my cat. began to rattle, and has been driving me nuts. Just above an idle, or at cruising speed (1200-1500 RPMs) seems to be the "sweet spot" where is vibrates the most.

I have read of the brick inside them going "bad", and causing this rattle, but is it possible something is just loose?

I haven't got under the car yet, but was wondering what I should be looking for when I do.

Thanks!

" ...'took my Cobra down t' the track, hitched to the back o' my Cadillac..."

- Jan & Dean, 'hey little cobra'

Scott

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A few days ago my cat. began to rattle, and has been driving me nuts. Just above an idle, or at cruising speed (1200-1500 RPMs) seems to be the "sweet spot" where is vibrates the most.

I have read of the brick inside them going "bad", and causing this rattle, but is it possible something is just loose?

I haven't got under the car yet, but was wondering what I should be looking for when I do.

Thanks!

Take a rubber mallet and bang on it, you should hear noise inside it. I had one go on a 91 Seville and it was loud. It sounded like a can with cans inside it. Mike

Early on sailors navigated by the stars at night and the North star became the symbol for finding ones way home. Once you know where the Northstar is you can point your ship in the right direction to get home. So the star became a symbol for finding ones way home or more symbolically even finding ones path in life.

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CATs are cheap to replace now.. They used to be 300-400$ long time ago but now you can pick up a high flow one for $89 if you want :>

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Using a rubber mallet is a good way of testing the cat but it's not allways conclusive. Another sign of a bad cat is excessive whistle when you rev the car at park. I replaced my cat a month ago because I bombed the aircare inspection in vancouver. My Hydrocarbon and NOx levels were way above the limit. I purchased a cat here for $160 can (including tax) and I passed the inspection.

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It might be the muffler hangers that are loose, or the muffler is banging into the heat shield. I know my whole exhaust is shot.. rattles like your's does. but i can hear the air escaping.

Going to replace it all pretty soon, once i get the idle speed down some and maybe a running rich problem, dont wanna burn it up.

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