hi guys just picked up a used 08 h3 for a great deal..my only issue is after i shut it off i hear a ping ping ping sound from underneath which i think is the exhaust?? is this just it cooling down? it happends regardless if i drive it for a minute or a hour and lasts for a couple of minutes...can anyone help me...thanks again look foward to what these beasts can offer..

 

I think thats all it is mine does the same thing.

 

is there anyway to stop the sound? kind of embarrsing when i stop somewhere and shut it off all u hear is ping ping ping and ppl look like u have a lemon.

 

I have a slight "pinging" from the exhaust on pretty much every vehicle but.....

Do you have the A/C on? If so Have you checked where the A/C Condensor drain tube is? Might be dislocated and spitting on the exhaust?

 

no a.c. has not been on at all ..and no drips coming from anywhere that i can see..i guess ill crawl under and pinpoint the exact spot of the sound and go fron there

 

ive heard the pinging on other cars before but yours seems a little more annoying then the average ping. does the engine temp get higher than normal? please keep us posted.....

 

This is the normal sound of an exhaust system cooling down..

Even after one minute. My 08 H3 and all my other rides do this too.

Nothing to worry about.

 

Is it a Alpha? My 08 Alpha's exhaust did it to when cooling until I installed the GM performance exhaust. My 07 really doesnt do it.

 

I get the same noise when I take a bottled water out of the fridge and leave it on the counter without fully tightening the cap.

Not from my H3, nor any of the other 4 vehicles in my driveway!

As metal heats and cools, it expands and contracts!!! While it is cooling, there may be a "weak spot" which will cause a "ping". Outside temperature & humidity can enhance this..

Take a look at the exhaust joints.. Look for carbon deposits (black spot), just may need a good tightening. GL

BTW, the more unburned fuel your vehicle is "exhausting", the hotter the exhaust will get, which can aggravate those joints & the cat.

 

It's likely your forward heat shield or more specifically, the stainless zip-ties they use to fasten the back part of the forward shield.

My tie broke shortly after I bought my vehicle. I put a stainless hose clamp on in its place. Started pinging like hell. Had it in to dealer for some warranty work and asked them to replace my temporary clamp with the thinner factory tie. They said they just use a stainless clamp for a replacement as the factory zip-ties weren't holding up and ping just as bad anyway.
Took it home and removed my clamp on the back of the shield and just bent the shield up ever so slightly so the shield wouldn't rattle on the exhaust and then moved the clamp to the front of the shield (where it's actually spot welded to the pipe) to hold it up in place.

No more ping at all.