Exhaust Noise

GARoese

Registered User
Can anyone help identify my exhaust noise? The car is an 89 SC with 5 speed with 160k miles. The exhaust appears to be the stock system. At idle the noise seems to come from the cats or resonator. It sounds kind of like a rattle. I don't if the cats have broken loose inside or if there is a problem with the resonator. Would like a new exhaust but must first fix brake problems and get it to pass state inspection.
 
my 90 and my buddie's 89 both started rattling in one of the cats.....his at 80,000 miles, mine at 115,000 miles....
 
It could be the heat shield found on your cats. I have also heard the muffler cause this on some cars. An easy way to find out is to go underneath your car and tap the components with your fist or a hammer. When one rattles, you have found the problem.

At this point, I would guess it to be the heat shields.
 
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