Down pipe burning firewall insulation?

LWATSON

LWATSON

future trans limpers
Jul 30, 2008
2,587
1
36
54
Scotland Neck NC
Just noticed today it looks like my insulation has been on fire some time or another. Theres a spot about 10"X10" right by the down pipe that is nearly white or very light gray and if you touch it, it crumbles to pieces. I have a 4" down pipe and its very tight against the insulation, just wondering if I need to be woried and rip the insulation off the fire wall. If I do remove it do I need to protect the firewall with anything like some fire proof insulation or something?
 
paint94979

paint94979

Beer Nazi
Sep 18, 2006
11,715
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LWATSON said:
My down pipe is not heat wraped. It looks like I'll be pulling the insulation off tommorrow. I'm suprised I didn't catch the truck on fire.
Click to expand...

mine is completely melted and it hasn't caught fire i wouldnt worry about it.
 
custom8726

custom8726

Active member
Feb 25, 2008
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Upstate N.Y
paint94979 said:
mine is completely melted and it hasn't caught fire i wouldnt worry about it.
Click to expand...

:roflmao:

Notice in the first pic the ripped insulation, then take note in the second pic how the same engine compartment looked days later after it caught fire ;)

TwinTurboTwinCP3s.jpg


D-maxfire.jpg
 
LWATSON

LWATSON

future trans limpers
Jul 30, 2008
2,587
1
36
54
Scotland Neck NC
Damn Custom, Your lucky you didn't lose the whole truck! Now that I think about it, I would catch a strange odor through the vents every now and then. Wonder if thats what I was smelling?
 
1lowdiesel

1lowdiesel

<- wish i was there
Sep 18, 2008
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Damn that's not good.

I didn't notice a bit of sound difference. The hood liner is what does most of the sound deadening.
 
LWATSON

LWATSON

future trans limpers
Jul 30, 2008
2,587
1
36
54
Scotland Neck NC
I pulled the insulation off my firewall this morning and it was a PITA! My advise is to remove it when you replace your downpipe and or your turbo. Mine was allot worse than I thought. It had burned the entire area behind the down pipe from top to bottom and had burned a spot about as big as a basketball on the left side of the downpipe. The only difference I notice in sound is you can hear the turbo at lower boost. Before it didn't start to sing until 5-7 psi of boost now you can hear it as soon as you start accelerating. It's still pretty quiet though.
 
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