bradym at sympatico.ca
Tue Dec 3 13:49:12 EST 2002
There was an element of skepticism regarding header wrap earlier on this
thread. I share it, though not through personal experience. I have a friend
who used header wrap on his 240Z headers. They disintegrated in just a
couple of years. Granted the headers may have been cheap (I don't know), but
my Z's headers are over 10 years old and are still in good shape. Mine had
no header wrap. I've heard something about the wrap keeping the heat in so
well that the metal gets way hotter than it's designed for, and therefore it
weakens and fails quickly.
This may be a load of bunk, but it makes sense to me. Any metallurgists out
Montreal, Quebec, Canada
86 4kq with 299,000km
86 4kq parts car
72 Datsun 240Z with 180,000 miles
92 VW Golf with 192,000km FOR SALE
in early stages of quattrosis accumulatus
----- Original Message -----
From: "Doyt W. Echelberger" <Doyt at NWOnline.Net>
> I just rebuilt an air cooled engine and put a layer of wrap on the exhaust
> headers before putting it back in the car. What kind of problems can I
> expect if I continue to run it with the wrap in place?
> I used the wrap because I wanted to get the radiant header heat away from
> the cooling fins and the case, so the oil wouldn't get so hot.
> I can take off the wrap pretty easily if there is a big risk of some kind.
> I imagine it is a risk of warping, or melting, or burning away of metal.
> They are stainless steel headers.
> Doyt Echelberger
> 76 VW Westfalia Bus with 2 liter engine
> At 10:14 AM 12/3/2002 -0500, you wrote:
> >Hi Jim/All,
> >.........snip............. All that heat trapped in the metal would
> >probably cause problems similar to header wrap.
> >Brady Moffatt
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