rattle or grinding noise
rattle or grinding noise
I have 98 astro and at start up a rattle or grinding noise seems to come from near the cat . when i hit the cat with my hand I hear something moving inside . Is this broke or just a nusince? My wife is complaining. gas milage is still good at 20mpgs .
1998 astro
2006 cobalt
2006 cobalt
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- I have my van tatooed on my cheeks
- Posts: 2667
- Joined: Sat Dec 02, 2006 12:34 pm
- Location: Orlando, FL
Re: rattle or grinding noise
The element inside the cat has come lose. The only remedy that I know of is to replace the cat. My '96 did the same thing. The rattle was very annoying. 

1996 Safari SLX Hotair balloon transport vehicle
Re: rattle or grinding noise
I know this is very late to update, but I had a new Emco Cat installed for $180 and it solved the problem. When we took the old one off and shook it rattled.
1998 astro
2006 cobalt
2006 cobalt
-
- I have my van tatooed on my cheeks
- Posts: 2667
- Joined: Sat Dec 02, 2006 12:34 pm
- Location: Orlando, FL
Re: rattle or grinding noise
Common problem. Wifey happy? 

1996 Safari SLX Hotair balloon transport vehicle