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does a catalytic converter make noises

620 views 8 replies 6 participants last post by  blkjak 
#1 ·
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
 
#7 ·
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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