Exhaust/Extractor: Heat wrap questions

[CMF_mycra]

so i heatwraped my headers for obvious reasons... today the guys at the exhaust shop strongly recommended taking them off.

they are stating that they crystallize the piping a eventually cracks. SHOULD I BE WORRIED???

 

[CMF_Greo]

Can accelerate rust i have heard. Due to the wrap collecting moisture. Like dew on cold mornings.

 

[CMF_asdame]

i read for SS tis fine but not recommended for mild steel cos as mentioned it'll trap moisture n corrode faster

 

[CMF_sikK11]

It can but i would not be worried. Really the moisture would be dried out within minutes of starting the car each morning. I have had it on mine for over 2 years now and changed it the other day. There was nothing wrong with my exhaust.

 

[CMF_mycra]

K11 headers don't come easy.... Lol
Um headers are that silver finish( not chrome) what kind of material is that?
Not Mild steel right?

 

[CMF_deNs]

I wouldn't think at all that the main issue with heat-wrapping a mild steel set of extractors would be rust/corrosion. Yes, it may happen quicker with the heat wrap on, but the reason you're doing it is to reduce under-bonnet temps, right? When you have the heat-wrap on, the heat the extractors experience would be intensified - I do remember hearing of an owner of a set of hurricane's experiencing cracked welds on theirs after using heat-wrap.

Like said, unless you're shelling out for stainless headers, it's just not worth it, especially given the outlay of proper heat wrap.

---dens

 

[CMF_sikK11]

You can get the headers ceremic coated for about 250.

 

[CMF_mycra]

Mm point taken....

 

[CMF_mycra]

Think I know what to do...
So rust/corrosion due to moisture... That's all I gotta worry about??

 

[CMF_deNs]

I know i'm quoting myself here, but:

deNs WROTE:

"I do remember hearing of an owner of a set of hurricane's experiencing cracked welds on theirs after using heat-wrap.

If you're using heat-wrap, you're keeping the heat in.

---dens

 

[CMF_mycra]

So keeping the heat in..... Would????
So cracking welds is due to excessive head or corrosion?