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Old 07-11-2014, 02:08 PM
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Heat Shield Rattling

Have been having an annoying rattle. Dealer of course couldn't find. So today I slid under the Jeep and started just "hitting" stuff lightly with my hand to see what might be loose.

Long and behold when I tap this heat shield it makes the exact noise I have been hearing. Unfortunately it is tightly screwed down .

Anyone else having this issue or know of how it could be fixed. Clearly an important shield or I would just remove it and be done with the noise. Makes the Jeep sound like it is 10+ years old.
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  #2  
Old 07-11-2014, 03:00 PM
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Re: Heat Shield Rattling

The bottom left looks pretty well tied down, but what about the edge away from your camera, and what looks like a possibly noisy section pointing off to the top right?

Is any part of it at all shiny, or anything it might be hitting showing impact marks?
That MAY not be the culprit, in that if you hit it, it will rattle.. can you move it at all anywhere such that it hits anything else?
If so, you might be able to tame the noise by bolting a small hunk of inert metal to it where it flexes [I wouldn't suggest lead]... but I'd also keep looking.
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Old 07-11-2014, 04:13 PM
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Re: Heat Shield Rattling

Quote:
Originally Posted by LogicNow View Post
Have been having an annoying rattle. Dealer of course couldn't find. So today I slid under the Jeep and started just "hitting" stuff lightly with my hand to see what might be loose.

Long and behold when I tap this heat shield it makes the exact noise I have been hearing. Unfortunately it is tightly screwed down .

Anyone else having this issue or know of how it could be fixed. Clearly an important shield or I would just remove it and be done with the noise. Makes the Jeep sound like it is 10+ years old.
This TSB fixed mine...bingo bango!

SYMPTOM/CONDITION:
Rattle, vibration, or squeak sound coming from heat shield underneath the vehicle.

http://www.wk2jeeps.com/tsb/tsb_wk2_1100314.pdf
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Old 07-11-2014, 04:42 PM
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Re: Heat Shield Rattling

Thanks for the TSB. Doesn't apply to my model year (2011) and my bolts are present and tight. Nice to know that it is not completely an isolated case.

Doesn't seem be hitting anything. The noise sounds like a loose license plate, which when you tap on this shield makes the same noise (it kind of is like a tuning fork in it takes very little force to replicate the noise). It is tightly secured, but there is nothing for it to connect to at the top end (top right of photo). Just the bends of the metal to provide the support from the base where it is screwed down.

Doesn't do it on "normal" bumps but I have some rough roads near my house that seem to cause just the right vibration.
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Old 07-11-2014, 05:38 PM
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Re: Heat Shield Rattling

Quote:
Originally Posted by LogicNow View Post
Thanks for the TSB. Doesn't apply to my model year (2011) and my bolts are present and tight. Nice to know that it is not completely an isolated case.

Doesn't seem be hitting anything. The noise sounds like a loose license plate, which when you tap on this shield makes the same noise (it kind of is like a tuning fork in it takes very little force to replicate the noise). It is tightly secured, but there is nothing for it to connect to at the top end (top right of photo). Just the bends of the metal to provide the support from the base where it is screwed down.

Doesn't do it on "normal" bumps but I have some rough roads near my house that seem to cause just the right vibration.
Can you get at it enough to pop rivet or screw a small hunk of stiffener to it?
A bit of cast iron would be good, as it tends not to resonate much, but I'd suspect just about any bit of heavier metal would work to shut it up.

... a louder stereo could also work.
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Old 07-11-2014, 05:52 PM
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Re: Heat Shield Rattling

Where is this heat shield located?
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Old 07-11-2014, 06:06 PM
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Re: Heat Shield Rattling

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Originally Posted by Peter_K View Post
Where is this heat shield located?
Left side of vehicle, directly back from the front suspension about 2' in from the edge. From the front door hinge, about 1' further back to the rear of the vehicle.
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Old 07-11-2014, 06:10 PM
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Re: Heat Shield Rattling

So that's the front driveshaft, on the transfer case side?
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Old 07-11-2014, 06:11 PM
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Re: Heat Shield Rattling

Quote:
Originally Posted by lstowell View Post
Can you get at it enough to pop rivet or screw a small hunk of stiffener to it?
A bit of cast iron would be good, as it tends not to resonate much, but I'd suspect just about any bit of heavier metal would work to shut it up.

... a louder stereo could also work.
I like the rivet or stiffener idea. Even just adding something like caulk (I know it has to be able to handle exhaust temperature to prevent a fire) would end the tuning fork effect.

.. Louder stereo has worked, plus once winter comes the windows will be up .
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Old 07-11-2014, 06:12 PM
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Re: Heat Shield Rattling

Quote:
Originally Posted by Peter_K View Post
So that's the front driveshaft, on the transfer case side?
That would be correct from what I can tell.
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Old 07-12-2014, 09:46 AM
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Re: Heat Shield Rattling

wedge a screwdriver in between it and the surface its mounted on, give it a little bend.

most likely it will solve the problem
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Old 07-12-2014, 01:57 PM
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Re: Heat Shield Rattling

I was trying to figure out where that shield was on mine. Apparently the V8 doesn't have it.

I would agree that a slight bend or dimple in the shield would change it's harmonics and likely change the rattle, perhaps eliminating it.
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