Mechanics

CHEVROLET MONTE CARLO EXHAUST PROBLEM

1998 Chevrolet Monte Carlo • 251,000 miles

Hello,

My Monte Carlo with a 3800 Series II engine has recently started making a loud exhaust-leak type noise in the engine compartment. It must be close to the firewall because you can hear while driving really well. I took it to an exhaust shop and they did a check on the exhaust sysyem and they could not find a leak anywhere. It's louder the colder it gets and when it's under a load going up an incline. I haven't had any DTCs since it has been doing it so I take it it's not electrical. The exhaust shop told me not to worry much about it but I know something is wrong and would like to know if anyone could give me some pointers of what would be causing this kind of noise.

Thank you in advance for the help,

Nathaniel
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Nathanielbarnes
January 18, 2013.



Have them check exasut maniflolds.

Hmac300
Jan 18, 2013.
They said they checked them and couldn't find any leaks. : /

Tiny
Nathanielbarnes
Jan 19, 2013.
You sure this isn't a 3.1l we dont list a 3.8 for 1998, anyhow there is heat shield it may be leaking under that or the egr tube that connects to exaust manifold.

Hmac300
Jan 19, 2013.
Thank you for your replies. It is the 3.8l. I have the Z34 model and not the LS. I'll check the EGR tube tomorrow when I can see it. As for as the exhaust manifold I'm not sure if I'll be able to check it myself. It's in a very tight spot and I have no way of putting my car on a lift to look at it from underneath.

Tiny
Nathanielbarnes
Jan 19, 2013.