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john -aka eauto
john -aka eauto, ASE Certified Technician
Category: GM
Satisfied Customers: 16008
Experience:  15 years as a auto tech
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There's been a rattling noise when the engine is on, and the

Customer Question

There's been a rattling noise when the engine is on, and the vehicle stalls sometimes in low RPMs.
JA: Where exactly do you think the noise is coming from? And how long has this been going on?
Customer: The rattling noise is maybe a couple of weeks. I originally thought it was something on my floor, but then it started stalling. It sounds like it's coming from the front passenger side
JA: What is the model/year of your GM?
Customer: 2011 Terrain
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: The only thing I've done is added oil--It was a little low. I'm still in the diagnostic/research phase. I am probably not planning on fixing it myself, I'm not very good with cars.
JA: Anything else you think the mechanic should know?
Customer: When it stalls, it starts right back up without any problem. But after the restart, there's a smell of gas coming from the vents for a few moments.
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the GM Mechanic about your situation and then connect you two.
Submitted: 1 year ago.
Category: GM
Expert:  john -aka eauto replied 1 year ago.

is the engine light on?

Customer: replied 1 year ago.
No, the engine light is not on.
Expert:  john -aka eauto replied 1 year ago.

would you know if it was coming from the tming chain area dn do you know if it is under warranty?

Expert:  john -aka eauto replied 1 year ago.


Customer: replied 1 year ago.
The sound seems to be coming from the front-passenger side of the car. It sounds a little like a pebble rattling in an aluminum can. I don't believe it's still under warranty.
Expert:  john -aka eauto replied 1 year ago.

sounds to me like the timing chain may be loose or a bad guide/ tensioner which should be checked out and listened to by a mechanic because you dont want it to jump time because that can lead to further damage from your description that is what it sounds like from your discription.

Expert:  john -aka eauto replied 1 year ago.

please rate my service 5 stars so i can get paid for my service and if you have any further questions please dont hesitate to ask as i am still at your disposal for what ever you need in regards ***** ***** issue