Rattling heatshield
Hello fellow SVXers,
I had my service gargage remove some of the exhaust heatshield to stop the annoying rattling. The mechanic removed "as much as he comfortably could". However, the rattling is still there, though not as bad. So my question is how much can I remove with out compromising my safety? Is there another option? Duke |
Re: Rattling heatshield
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Well, stay off the dry grass. I have seen guys on Honda intregras taking them all out and they are fine. If it is still rattling, check the resonator. My resonator was removed due to the rattling ( and most exaust places will not touch it). Good luck |
I happen to like the heat shields. I do not like the idea of water hitting the exhaust pipe directly. You know? Driving through puddles and such. The exhaust pipe is hot and water is cold. Thermal stress is the result. Just my thoughts on the subject. I am rather impressed with the SUBARU exhaust system. In general I think they last a real long time.
I was looking at my heat shields yesterday and I was surprised to see something that looks like insulation material jamed inside between the shield and pipe. Rattle stopper? |
Lwin's probably right. I had the "buzz" when I purchased the car in January. I had my "all-purpose" mechanic check it out. He didn't think removing the heat shields was a good idea, so he packed in some asbestos & tightened them. The buzz was actually coming from the resonator. I lived with it until just last week when I bit the bullet & took the car to Meineke. They replaced the resonator with a straight pipe to the tune of $145.00 (claimed they had to spend 2 hours disassembling the rear of the exhaust system). Anyway, it's only money & all traces of the buzz have disappeared.
Ron. |
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Thanks for the posts
This sounds like the fix to my problem.
I have laid on the ground and hit everything that looked like a heatshield (and everything else for that matter) with a wrench to duplicate that rattle. All I got was a dirty shirt. Now I'm trying to figure out how I can see my transmission mounts from a car that I can't even fit my head under! |
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Ryan |
Rattling heatshield
My understanding, right or wrong, is that the heatshields are there for two reasons. 1) to keep heat in the exhaust system. Keeping the temperature up in a certain range helps with emissions. The cats run hot so they can do their job. Without heatshields and the packing, the exhaust is cooled enough to drop the temp. below this optimum range. 2) to avoid a fire hazard.
Chuck |
Sounds like a reasonable reason. However, as for everyone with the terrible "buzz" noise. I would first to look at your resonator and not assume its a heat sheild. Seems to be the root of the problem for everyone that I have talked to.
Ryan |
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Lwin |
Re: Thanks for the posts
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Put your car on the lift. Start the car and press gas while on the lift to make the sound. then someone go down and look the exause to see where the problem really is. Lwin |
before i had my custom exhaust installed.
i had the loud rattle problem too. local mechanic replaced it for $50 with a piece straight pipe. car sounded pretty good after the resonantor was removed. i have since removed all of my heat shields. i dont make it a habit of parking my car on dry grass so i am not worried about fire. i wanted to get rid of the weight and the potential for more rattles. i am not disappointed nor have i had any problems.
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I would say it is your resonator. like ryan, I had mine done for 30 bucks and 8 mins later no buzz.
Good Luck |
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Re: Thanks for the posts
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One muffler guy banged on everything, including the resonator, and absolutely swore it WAS NOT the resonator. Guess what - it was the resonator. So just whacking it with a wrench will not necessarily identify it as the source of the buzz. As someone else suggested, putting it the lift and revving the engine is a much better diagnostic. My personal feeling is that it's better to put something other than a piece of pipe in place of the resonator, hence the glasspack, which acts something like the resonator. Of course, a lot of folks have the pipe, and it doesn't seem to cause problems. Either way, getting rid of the resonator will probably fix your problem. |
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