Exhaust is making a metal popping noise

[Fixxxer]

I have a 95 Jimmy, I got a new muffler this past January and a new catalytic converter in April, and for the past 2 months or so, when I first start driving it, after 30 seconds I hear like a metal popping noise coming from the exhaust and then I hear it again every few minutes or so. I had Midas check it, and they couldn't find any leaks or anything. Also, when I shut it off, it makes the noise a few minutes later. I'm thinking it's expanding or something...I don't know, anyone have any ideas? It's driving me nuts! Thanks!

[BlazerLT]

Oh, lol.

The metallic ticking noise is the exhaust system expanding and contracting with heat.

Completely normal and absolutely nothing to worry about.

Mine does it to.

[Rick Norwood]

I'm thinking it is the Metal expanding and contracting due to the heating up/cooling off. I would think by now it should have stopped. As long as it's not leaking anywhere, it shouldn't be a problem.

[Fixxxer]

Alright, thanks folks haha.

It's just I've never had this happen before so it was bugging me

[BlazerLT]

Originally Posted by Rick Norwood

I'm thinking it is the Metal expanding and contracting due to the heating up/cooling off. I would think by now it should have stopped. As long as it's not leaking anywhere, it shouldn't be a problem.

Nah, age doesn't affect the ability of metal to expand and contract.

[Rick Norwood]

You're right again. My 2000 Jimmy is still doing it. Thanks for setting the record straight. Now I'm hearing the blasted pops and creeks.

[BlazerLT]

Think of it as your truck singing the tune of being up to proper operating temperature.