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Old 09-02-2012, 08:07 PM   #1
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Heat transfer... and keeping cool....

My project for next weekend is to strip the interior and bedline the tub. My question has to do with the heat transferred from the exhaust to the bottom of the tub. If I replace the exhaust from manifold back with aluminized pipe and wrap the pipe with DEI Exhaust wrap to insulate generated heat and keep it inside the exhaust pipe. I know this stuff works on turbo vehicles to reduce underhood temp but what do you guys think about the entire length of a TJ tub?
Does this sound like a decent idea?
What could be some possible set backs or problems I may run into?

I run a 2000 2.5L 5 speed

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Old 09-02-2012, 08:15 PM   #2
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the cost would be high but no draw backs from doing it.
i have all of mine lined and just use thick catch all floor mats.

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Old 09-02-2012, 08:20 PM   #3
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the cost would be high but no draw backs from doing it.
exhaust wrap will absorb water, oil and other fluids. which will in turn burn off from the exhaust heat....and with enough flammable stuff in there and you have a fire danger.

you can "seal" the exhaust wrap using silicone header wrap sealant...but it needs to be baked at ~400°F for some time after spraying... but you can't fit a full length downpipe in your kitchen oven...

btw, doing the whole thing in header wrap would be stupid expensive. cutting up a header blanket would be an alternative...
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Old 09-02-2012, 08:29 PM   #4
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The blanket I could do pretty easy.... I can seal it no problem, my dad owns an exhaust shop so I get parts at wholesale cost and his business partner does powder coating so an extralarge oven is not a problem either. Do you think it would be better to do sections. From manifold to cat, then mid pipe and muffler, then tail pipe over the axle. My dad gave me the idea but like he said how am I gonna learn if I dont figure it out myself.... I will be doing all the work over the next week so any help or tips would help.
Thanks guys
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Old 09-02-2012, 08:35 PM   #5
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Originally Posted by wranglermatt4527 View Post
The blanket I could do pretty easy.... I can seal it no problem, my dad owns an exhaust shop so I get parts at wholesale cost and his business partner does powder coating so an extralarge oven is not a problem either. Do you think it would be better to do sections. From manifold to cat, then mid pipe and muffler, then tail pipe over the axle. My dad gave me the idea but like he said how am I gonna learn if I dont figure it out myself.... I will be doing all the work over the next week so any help or tips would help.
Thanks guys
with all those connections, do ceramic coating instead....
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Old 09-02-2012, 08:57 PM   #6
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Think that would be cheaper? Would that retain exhaust heat as well as the wrap or header blankets?
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Old 09-02-2012, 09:05 PM   #7
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DEI makes a wrap they call titanium wrap that is supposed to resist soaking up water and oil. I only like the wrap because Ive used it before on a WRX and saw first hand the under hood temps reduced drastically. I may ask my dads associate what he thinks before I jump into anything. Thanks again guys. The more options I have the better.
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Old 09-02-2012, 10:56 PM   #8
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You can buy ceramic coatings from powder coating suppliers like https://www.columbiacoatings.com/category_s/1051.htm

They're applied using a simple cheap touchup spray gun. I see they now have air dried coatings but i've only used the oven cured ones. Tried the chrome coating it goes on green, cures to white, buffs to brushed aluminum when rubbed with steel wool. To get the actual chrome look it needs to be polished. Also have used titanium. Both have worked very well and held up for years on a few cars. A little of the stuff goes a long ways too.
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Old 09-03-2012, 09:31 AM   #9
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WOW.... nice Columbia has exactly what Im lookin for.... I could do this in my stall at the shop and not take up anyones time for help. This is why I love this forum. Thanks Unlimited and Chevy for the ideas

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