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Old 12-11-2013, 02:41 PM   #1
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Exhaust muffler Workhorse Chassis

Hi to any workhorse chassis owners or anyone with similar issue. I have a 2008 Damon Outlaw with 8.1 Workhorse. There are 2 separate mufflers that have a insulation and metal cover over the muffler. Due to condensation my driver side muffler cover has rusted out so I removed it. The muffler itself is good but should I be concerned that now there may be to much heat under the floor of the motorhome? Should I recover or add a heat shield?

Any advice would be greatly appreciated

Pitbull
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Old 12-11-2013, 03:17 PM   #2
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Hey!, Fellow Outlaw owner,

My '07 (on a W24) does not have any heat barrier around the mufflers...maybe an improvement in the '08(?) But, my mufflers are not near anything that is heat sensitive...maybe the '08 has the muffler tucked up tighter to the RV floor(?)

I recommend replacing any heat barrier that a vehicle came with.

And, maybe this question could be made in the Workhorse Chassis forum vs. the General Class A Discussion forum to get more expert exposure: Workhorse and Chevrolet Chassis Motorhome Forum - iRV2 Forums

Best luck...

And, if interested, there's an Outlaw Mods and Easy Fixes thread I started:
OUTLAW Mods and Easy Fixes
where details of your exhaust project would be a welcome addition.
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Old 12-11-2013, 03:31 PM   #3
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Thanks Steve---I will check out the other sites. I am the the second owner and the unit came from California----I am in Canada so condensation can be quite a problem up here. I thought possibly the Cali regulations may be why they have the wraps and heat shield on.

Pitbull
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Old 12-11-2013, 03:46 PM   #4
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We have a 2005 W-22 chassis. Myself and a friend spent over a week every day grinding and sanding to get rid of the rust on the compartments. While underneath the coach I did notice the muffler surface themselves were flaking and peeling off. I did not notice a heat shield between the chassis and the mufflers. An interesting thing is that I also was informed (by a workhorse dealer) that the manifolds were warped. The solution was to have the Banks Powerpac system installed. They replaced the two mufflers with one big one and had one big tail pipe. They did not install a heat shield above the muffler.
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Old 12-11-2013, 03:55 PM   #5
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Thanks Codger
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Old 12-11-2013, 04:33 PM   #6
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I don't have heat shields above mine (probably fell off). I had two that were falling off where the exhaust pipes come out so I just removed the shields and for insurance just put some Dynamat/Dynaliner on the bottoms of the storage areas where the pipes come out to protect from any chance of heat.
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Old 12-13-2013, 02:45 PM   #7
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I did replace the heat shields that were attached to the exhaust pipes that travel under the storage compartments as you mention. Your repair is probably easier and just as good. The one I am referring to in around the muffler itself
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Old 12-13-2013, 02:52 PM   #8
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Quote:
Originally Posted by pitbull View Post
I did replace the heat shields that were attached to the exhaust pipes that travel under the storage compartments as you mention. Your repair is probably easier and just as good. The one I am referring to in around the muffler itself

Yep, what I was thinking is to do a liner on whatever may get heat above the mufflers and you won't have to deal with the crappy shields.
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Old 12-13-2013, 03:04 PM   #9
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Can I ask what that product is? Is it a heat reflective mat that you screw on?
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Old 12-13-2013, 03:54 PM   #10
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It is a stick on product that is very sticky from Thermo Tec. Has both sound proofing and heat protecting qualities:
http://www.thermotec.com/products/13...t-barrier.html
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