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Old 06-20-2002, 05:26 PM   #1
Slack
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Question Exhaust Heatshield Rattle....

Okay, I made sure and did a search on this before I made a new thread, and I didn't find anything specific. I have a 2000 L and when decelerating with clutch in and still in gear, the heat shields rattle like a mofo...it sounds like a pontiac grand prix...is there any way to fix this w/o taking them off? I'm sure someone else has had this problem, so please let me know.



-Slack

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Old 06-20-2002, 05:59 PM   #2
2.5GT
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Unfortunately, there are not fixes. After a while, the bolts become seized and you won't be able to torque them. I just cut off all of my heat shields, from the headers back. Left the cat heatshields on. Haven't had any problems yet . . . parked on the grass, too. Just don't park on top of any dried leaves.

Jason

FWIW, aftermarket exhaust systems don't come with heat shields and most people I know who replace those parts don't put the heat shields back on (they don't fit most of the time).
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Old 06-20-2002, 07:55 PM   #3
tselway
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I had the rattle too. Used a hand grinder to undo the bolts.

No heat shields now, no rattle.
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Old 06-20-2002, 09:35 PM   #4
Slack
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haha...thanks guys. I was hoping I wouldn't have to cut them off. Why are they even there anyway? Is it to disperse the heat away from the engine or what?
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Old 06-20-2002, 10:14 PM   #5
Oquipah
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Cool Heat Shields

yeah, I recently had the mofo of rattles on the "y" pipe and after several attempts to bandage it up, I had it cut off.

Some people have had luck using loc-tite to hold it all together (found at most auto stores), but there are many on this board that don't have any heatshields on their car! Go figure.

Peace,
Oqui
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Old 06-20-2002, 10:42 PM   #6
Patrick Olsen
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If it's the heat shield on the stock headers, I'd kinda be inclined to keep them intact. Anything downstream of the cats can come off.

How to fix the rattle? Try a U-bolt style exhaust clamp, or a reasonably heavy hose clamp. I used the latter in a couple places when I still had the stock headers and it worked out well.

Pat Olsen
'97 Legacy 2.5GT sedan
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Old 06-20-2002, 10:56 PM   #7
Slack
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Okay, thanks alot...I might try the u-clamp, because I could probably get one pretty cheap. I just hate riding around with a reasonably new car that sounds like my gf's 91 grand prix.
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Old 06-20-2002, 11:25 PM   #8
Tkacik
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Just cut them off, thats how I remedied the problem
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Old 06-21-2002, 10:19 AM   #9
goobie
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Default Take Pat's Advice!

Quote:
How to fix the rattle? Try a U-bolt style exhaust clamp, or a reasonably heavy hose clamp. I used the latter in a couple places when I still had the stock headers and it worked out well.
I had a heat shield on my cat that started to rattle. I bought a heavy stainless steel hose clamp and torqued it up good. No more rattle! You could do the same with the sheilds on the header. I will work if you put in on the right place.
A cheap and simple fix to a very annoying problem!

Chad
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Old 04-01-2013, 03:04 PM   #10
smallv
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Default Yes. Stainless Steel hose clamps cures Heat Shield Rattles.

Stainless steel hose clamps definietly did the trick for my heat shield rattles. I used about 12 of them and clamped down the whole system.

That's three or four clamps per section. I clamped at the joints of each section. Also once or twice in the middle regions of each section. 4.5 inch length hose clamps seemed to be the right circumference for most points.

I picked up a $24 variety pack of assorted lengths of SS hose clamps from Princess auto (plus two extra 4.5 inch). The assorted pack kept the cost down to $1 per clamp which is half the normal price.

Each time I added a clamp, I just tapped hard on the heat shield with my fingers and listen for the remaining rattles. The trickiest spot was the largest joint near the O2 Sensor. For that one I clamped one snug tight against the seam and then Clamped a second diagonally over top of the first. That one was the hardest rattle to track down.

There are now zero rattles which is great becasue it use to sound like a junker and now it sounds brand new.

I've attached pictures.

Also, be careful about asking a dealership to fix a heat shield rattles for you. One dealership "fixed it" for me a few years ago. I was pleased until I saw what they did. They just drove two big lag bolt straight into the muffler system. The bolts are not stainless steal so it won't be too long before these turn into giant holes in my exhaust system. Very dumb. Very Lazy. Very unprofessional. Its probably going to shorten the life of that exhaust component from about 15 years to less than seven.




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Old 04-01-2013, 03:25 PM   #11
joker75
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I had a nasty exhaust rattle develope last week on my 08 2.5i. When I finally had a chance to climb underneath it, I noticed that the rattle was coming from the rear of the heatshield over the cat. In looking at the other heatshields, I noticed that there was some type of mesh clamped between the heatshields and the exhaust pipe everywhere except the one that was making the noise.

I ended up cutting the two bolts holding the upper and lower heatshield around the cat in order to remove them. I then purchasing a $8 water heater hose from Lowe's that had a stainless steel braided cover on it. I cut the braided cover off and removed it from the hose. I then flattened the braided cover and wrapped it around the exhaust pipe so it fit in between the heatshield and exhaust pipe. I used two new stainless bolts to clamp everything back together.

All better. Not too bad for about $12 in parts.
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Old 04-01-2013, 10:29 PM   #12
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unless you sit in a ton of stop and go traffic cut them off
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Old 04-02-2013, 12:18 PM   #13
Rudgers73
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Quote:
Originally Posted by stevefazek View Post
unless you sit in a ton of stop and go traffic cut them off
I agree with that except for the shields around the cats. Which happen to be the ones that rattle on mine. Anything behind those? Hack em off
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Old 04-02-2013, 07:31 PM   #14
MikeC5
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A few well placed welds has done the trick also.
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Old 06-05-2013, 10:06 PM   #15
jazznuts699
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Quote:
Originally Posted by smallv View Post
Stainless steel hose clamps definietly did the trick for my heat shield rattles. I used about 12 of them and clamped down the whole system.

That's three or four clamps per section. I clamped at the joints of each section. Also once or twice in the middle regions of each section. 4.5 inch length hose clamps seemed to be the right circumference for most points.

I picked up a $24 variety pack of assorted lengths of SS hose clamps from Princess auto (plus two extra 4.5 inch). The assorted pack kept the cost down to $1 per clamp which is half the normal price.

Each time I added a clamp, I just tapped hard on the heat shield with my fingers and listen for the remaining rattles. The trickiest spot was the largest joint near the O2 Sensor. For that one I clamped one snug tight against the seam and then Clamped a second diagonally over top of the first. That one was the hardest rattle to track down.

There are now zero rattles which is great becasue it use to sound like a junker and now it sounds brand new.

I've attached pictures.

Also, be careful about asking a dealership to fix a heat shield rattles for you. One dealership "fixed it" for me a few years ago. I was pleased until I saw what they did. They just drove two big lag bolt straight into the muffler system. The bolts are not stainless steal so it won't be too long before these turn into giant holes in my exhaust system. Very dumb. Very Lazy. Very unprofessional. Its probably going to shorten the life of that exhaust component from about 15 years to less than seven.




Hey gang - this post helped with my wife's 08 Tribeca exhaust rattle. Got a bag of 4 galvanized hose clamps from Lowes and put them on 2 on each heat shield. No more rattle, what a difference. And like everyone else my bolts were rusted in place.
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Old 06-05-2013, 10:10 PM   #16
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Quote:
Originally Posted by smallv View Post
Stainless steel hose clamps definietly did the trick for my heat shield rattles. I used about 12 of them and clamped down the whole system.

That's three or four clamps per section. I clamped at the joints of each section. Also once or twice in the middle regions of each section. 4.5 inch length hose clamps seemed to be the right circumference for most points.

I picked up a $24 variety pack of assorted lengths of SS hose clamps from Princess auto (plus two extra 4.5 inch). The assorted pack kept the cost down to $1 per clamp which is half the normal price.

Each time I added a clamp, I just tapped hard on the heat shield with my fingers and listen for the remaining rattles. The trickiest spot was the largest joint near the O2 Sensor. For that one I clamped one snug tight against the seam and then Clamped a second diagonally over top of the first. That one was the hardest rattle to track down.

There are now zero rattles which is great becasue it use to sound like a junker and now it sounds brand new.

I've attached pictures.

Also, be careful about asking a dealership to fix a heat shield rattles for you. One dealership "fixed it" for me a few years ago. I was pleased until I saw what they did. They just drove two big lag bolt straight into the muffler system. The bolts are not stainless steal so it won't be too long before these turn into giant holes in my exhaust system. Very dumb. Very Lazy. Very unprofessional. Its probably going to shorten the life of that exhaust component from about 15 years to less than seven.






Hey gang - this post helped with my wife's 08 Tribeca exhaust rattle. Got a bag of (6) 4.5" to 5"galvanized pipe clamps from Lowes for $10 and put them on 2 on each heat shield. No more rattle, what a difference. And like everyone else my bolts were rusted in place.
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Old 06-08-2013, 10:01 PM   #17
time2shine
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we use stainless steel license plate screws at the dealership. Screw them right through the shield and let the screw push against the pipe, pushing the shield out and having constant pressure on it. Stops the rattling.
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Old 06-22-2013, 10:52 PM   #18
greg2.5
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the heat shield shields around my headers are the ones giving problems. is it ok if i put a couple tack welds on the top between the shield and the flange of the exhaust manifold?
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Old 06-23-2013, 01:08 AM   #19
tnrknght
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IIRC theres a little lip where the two pieces of sheetmetal areusually bolted (Im referring to my legacy wagon honestly) I would just use a couple self-tapping screws and button it up if you really wanna keep them. I just ripped off the shield over the muffler the other day. weight reduction=power lol
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