Why heat wrap causes rust
Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
I suppose some people actually drive these things in the rain!
Or take such short trips that the condensation doesn't have time to burn off!
Or take such short trips that the condensation doesn't have time to burn off!
6th Gear
Joined: Nov 2006
Posts: 6
Likes: 0
It causes the damage when the car is off while it is sitting in the garage. The moisture is absorbed and penetrates the header wrap on the exhaust and rusts it,.Hope this helps....
Le Mans Master
Joined: Sep 2006
Posts: 6,050
Likes: 147
From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
heat wrap
a better way is what I did. (puffs out chest)
I got aluminum tape (the shiny kind about .005 thick) and got fiberglas insulation, and pulled the insulation apart till it was about an inch thick.
Then scrunched it and coated both sides with the aluminum tape, and made a small blanket. then wrapped it around the EGR pipe, and added more aluminum tape to close the seam.
It has been on my car about 4 years now, and the tape looks as good as the saturday I put it on the car.
I would guess it would work on exhaust as well.
but it would look dorky on headers
I got aluminum tape (the shiny kind about .005 thick) and got fiberglas insulation, and pulled the insulation apart till it was about an inch thick.
Then scrunched it and coated both sides with the aluminum tape, and made a small blanket. then wrapped it around the EGR pipe, and added more aluminum tape to close the seam.
It has been on my car about 4 years now, and the tape looks as good as the saturday I put it on the car.
I would guess it would work on exhaust as well.
but it would look dorky on headers
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Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
I tried some Al wrap over my ratty EGR tube but finally sprang for the $$ and bought a new wrapped pipe for my '88; good idea you had there...
I think a wrap for the starter would be ok as it isn't mild steal so not as quick to rust away and doesn't get as hot. It's the combo of heat & trapped moisture on mild steel that promotes the rusting.
I think a wrap for the starter would be ok as it isn't mild steal so not as quick to rust away and doesn't get as hot. It's the combo of heat & trapped moisture on mild steel that promotes the rusting.
