: nasty rattle in rear of my wagon



VTKE
04-20-12, 07:20 PM
searched but didn't find anything specifically related to my apparent issue with a rattle or whatever to call it. it seems to be the floor of the rear section of the wagon. it's a plastic folding piece covered with carpet. i've checked the compressor section cover and everything including my corsa, but it still rattles on rough bumps. anyone else have this problem on an 09 plus?

Griffin337
04-20-12, 07:32 PM
So far, knock on wood, that is one problem i dont yet have..

VTKE
04-20-12, 08:41 PM
i've pulled everything out you could and used pipe insulation to stop all the rattles i could force by hand, but i keep coming back to the folding floor. driving me insane...

FLTRI
04-21-12, 02:00 AM
Pull the battery box door and check in there. That's where mine was...

Griffin337
04-21-12, 04:58 PM
I am going to go out and see if i can find anything.. most of the time i have the stereo pretty loud so i dont hear the rear end whine. :annoyed:

VTKE
04-23-12, 09:19 AM
Pull the battery box door and check in there. That's where mine was...

that was actually my first thought as well. battery is locked down tight and i can't find anything else in there to cause it. i bought some rubber sticky back weather stripping to put under the floor lid and the compressor area cover. i'll post the results. i really hate to say this, but i didn't have the problem until the corsa went on. it takes a lot of pushing and pulling to make it touch anything under the car, but it seems the noise is much more frequent at high operating temp. i know exhaust expands at temp because the tips stick out almost a half an inch further when hot. this puts the mufflers very close to the rear most hangers brackets. hope i'm wrong.

Griffin337
04-23-12, 10:16 AM
I put my corsa on Sat am. Checked it several times and no rubbing/hitting noises etc.. Are you sure the noise is new with the exhaust? Does it always happen?

VTKE
04-23-12, 01:32 PM
I put my corsa on Sat am. Checked it several times and no rubbing/hitting noises etc.. Are you sure the noise is new with the exhaust? Does it always happen?

i wish i could swear to it, but i can't. i just never heard it before that. i isolated everything in the back with the soft rubber and still have the rattle/bumping noise to a lessor degree. that could be because i haven't hit the roughest road yet. when i say rough, for where i live it is, but other parts of the country it's probably pretty mild. what really sets it off is when both rear wheels hit the same bump at the same time like a fairly smooth railroad crossing or pavement filler that crosses the entire lane.
i'm almost to the point of living with it.

VTKE
04-23-12, 05:06 PM
well.... i believe i have finally conquered the noise and determined it's cause. after realigning the corsa for at least the fifth time and perfectly centering the tips in the cutouts, road testing it to the extreme with hard cornering and excessive bumps, i no longer have the noise. keep in mind that over three days time i have isolated every possible thing with soft rubber (one at a time for diagnostic purposes) and finally end up with the ever so slight misalignment of the exhaust to be the culprit.
word to the wise; align it, check all the hangers to make sure they are where they will be after some rough road driving by tugging and pulling in all possible directions, road test the heck out of it at full operating temperature then check it again. please understand this is not in any way a bad review of the product rather an encouragement for due diligence when installing or possibly pay the price of having to do what i did and the possible loss of sanity in the process.

Griffin337
04-24-12, 12:03 AM
Glad you got it taken care off! Mine is going back in tomorrow for the rear end whine.. i will definitely check mine to make sure its tight and hangers are all good.. but so far i have had no issues...

Was it both sides?

VTKE
04-24-12, 09:45 AM
Glad you got it taken care off! Mine is going back in tomorrow for the rear end whine.. i will definitely check mine to make sure its tight and hangers are all good.. but so far i have had no issues...

Was it both sides?

i believe it was. both tips were too close to the inside part of the cutouts causing them to bump slightly with a moderate to heavy jolt. if you center them, it would take running over a curb at 20 MPH to make them hit either side. sorry about the rear end whine. taking mine in for fluid checks to be sure all is well.

Teutonaddict
04-24-12, 09:51 AM
word to the wise; align it, check all the hangers to make sure they are where they will be after some rough road driving by tugging and pulling in all possible directions, road test the heck out of it at full operating temperature then check it again. please understand this is not in any way a bad review of the product rather an encouragement for due diligence when installing or possibly pay the price of having to do what i did and the possible loss of sanity in the process.

Good advice! With these stainless systems and the incredibly tight tolerances through the routing to the back of the car, it's not at all unusual for ANY aftermarket system to move from its initial install. Stainless expands a lot when at operating temp, and is prone to move around. I, too, had a rattle appear some time after initial install, and it wasn't apparent to me until up on a lift. Went to my local custom muffler shop and had them play around with it until no clearance issues when cold or hot. Glad you found your solution!

Cadillac Cust Svc
04-24-12, 12:29 PM
well.... i believe i have finally conquered the noise and determined it's cause. after realigning the corsa for at least the fifth time and perfectly centering the tips in the cutouts, road testing it to the extreme with hard cornering and excessive bumps, i no longer have the noise. keep in mind that over three days time i have isolated every possible thing with soft rubber (one at a time for diagnostic purposes) and finally end up with the ever so slight misalignment of the exhaust to be the culprit.
word to the wise; align it, check all the hangers to make sure they are where they will be after some rough road driving by tugging and pulling in all possible directions, road test the heck out of it at full operating temperature then check it again. please understand this is not in any way a bad review of the product rather an encouragement for due diligence when installing or possibly pay the price of having to do what i did and the possible loss of sanity in the process.
Glad to see you were able to resolve the issue this weekend, VTKE! I was very sorry to hear about your frustrations, and I wanted to quickly jump on this thread to thank you for posting your update so the community can benefit from your experience.

Best,

Katie
Cadillac Customer Service

VTKE
04-24-12, 07:09 PM
Glad to see you were able to resolve the issue this weekend, VTKE! I was very sorry to hear about your frustrations, and I wanted to quickly jump on this thread to thank you for posting your update so the community can benefit from your experience.

Best,

Katie
Cadillac Customer Service

appreciate you watching the forum and your comments.

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Good advice! With these stainless systems and the incredibly tight tolerances through the routing to the back of the car, it's not at all unusual for ANY aftermarket system to move from its initial install. Stainless expands a lot when at operating temp, and is prone to move around. I, too, had a rattle appear some time after initial install, and it wasn't apparent to me until up on a lift. Went to my local custom muffler shop and had them play around with it until no clearance issues when cold or hot. Glad you found your solution!

going to my muffler shop to have four spot welds on each of the joints to lock it where it is. too much effort to let slip even a little bit. i don't have the good fortune to have access to a lift so up the ramps, down the ramps and so on.

thanks to all those who posted on this thread (and others). that's why forums are so valuable.