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does a catalytic converter make noises

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does a catalytic converter make noises

Postby blkjak » Sat Oct 11, 2008 3:02 pm

hi -

does a catalytic converter make weird noises when it heats up and is going bad?

what does it sound like?

i t has 150,000 miles on it -

blkjak - thanks
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Postby RamaCrx » Sat Oct 11, 2008 4:38 pm

I've seen them when they start coming apart and all the stuff is loose inside and rattles and or comes out tailpipe.
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Postby 87TransAmGTA » Sat Oct 11, 2008 5:24 pm

attempt to get under the car hit the cat with ur fist or rubber mallet. if theres a small rattle noise coming from it its starting to fall apart inside. but at 150,000 miles its probly in need of replacement soon anyways.
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Postby blkjak » Sun Oct 12, 2008 4:48 am

hi -

thanks for the info....i am hearing like a "grrrr" noise when engine at full temp.... can not hear it with hood open....just sitting in driver seat?

blkjak - :?:
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Postby 87TransAmGTA » Sun Oct 12, 2008 7:41 am

possible exhaust leak? tough to say tho.
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Postby SETI20 » Sun Oct 12, 2008 8:01 am

150K on a cat? Yeah, it's time for a new one haha.

Service manual specifies you should replace this every 4 years or so.
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Postby mossin_90 » Sun Oct 12, 2008 6:23 pm

when they are clogged up

smells like a rotten egg

they turn cherry red when hot

the engine sound the same as when the spark plugs are fouled by excess gasoline dumped in the piston chambers.

pull it out and look toward a bright light through the cat hole, the lesser light you see the higher concentration of crap is inside of it, which = time to replace. but at 150 i would replace anyways
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Postby NozHayr » Sun Oct 12, 2008 10:28 pm

Sounds like that pesky input shaft bearing to me.

Far as the cat goes, you don't have emission testing in FL. right? So what the heck, headers and a straight pipe... YEEEE_HAWW!!

:D
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Postby blkjak » Mon Oct 13, 2008 3:08 am

NozHayr wrote:Sounds like that pesky input shaft bearing to me.

Far as the cat goes, you don't have emission testing in FL. right? So what the heck, headers and a straight pipe... YEEEE_HAWW!!

:D


automatic trans.... :?:
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