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Old Oct 19, 2009 | 12:51 PM
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Has anyone ever seen fuel rail covers that have fiberglass insulation underneath them? If so, what is the purpose?
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Old Oct 19, 2009 | 12:54 PM
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No help here, I have seen a lot of covers and never seen any with fiberglass on them.
Maybe they were custom painted and the fiberglass was used to help keep the heat from the heads away from the paint.
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Old Oct 19, 2009 | 02:41 PM
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I've never seen that.
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Old Oct 19, 2009 | 02:58 PM
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They are Z06 covers on a 2000 FRC. I opened the hood and saw that the cover was popping off and I pressed down and the insulation was holding it back from clipping into place. The guy said it was "old school" to keep the heat towards the motor and out away from the underhood area. I'm just going to remove it as I'm sure it can't be hiding anything.
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Old Oct 19, 2009 | 03:02 PM
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Have never seen fiberglass under the FRCs and really can't think of a good reason for it to be there.
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Old Oct 19, 2009 | 03:20 PM
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Originally Posted by Len90Vette
The guy said it was "old school" to keep the heat towards the motor and out away from the underhood area.



If you're running an aftermarket hood, with no hood blanket, and a $10,000 paint job... maybe.
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Old Oct 19, 2009 | 04:39 PM
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Originally Posted by jrose7004
I've never seen that.
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Old Oct 19, 2009 | 05:19 PM
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I could be wrong but I thought that C6's had some sort of rubber or foam insulation under their rail covers, and I thought it was only for valvetrain noise reduction. I've never seen anything with fiberglass for heat purposes though.
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Old Oct 19, 2009 | 05:35 PM
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Originally Posted by Len90Vette
They are Z06 covers on a 2000 FRC. I opened the hood and saw that the cover was popping off and I pressed down and the insulation was holding it back from clipping into place. The guy said it was "old school" to keep the heat towards the motor and out away from the underhood area. I'm just going to remove it as I'm sure it can't be hiding anything.

I've never heard that keeping the heat towards the engine is a good thing. Even in the "good old days."

BTW: This is old school...

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Old Oct 19, 2009 | 07:28 PM
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I added fiberglass cloth to the backside of mine after I removed the ribs for support but not actual fiberglass insulation.
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Old Oct 20, 2009 | 01:12 AM
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My Lingenfelters do from them factory direct. I was told to reduce paint issues with the heat.
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Old Oct 20, 2009 | 06:32 AM
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Originally Posted by gunnerja
My Lingenfelters do from them factory direct. I was told to reduce paint issues with the heat.
I've got the same set up as you with the the Lingenfelter fiberglass fuel rail covers (mine came without insulation) and have never had a problem with the paint on them.
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Old Oct 20, 2009 | 06:38 AM
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WKMCD.....Now that's GOOD old school, very sharp, I like it!


I've got no special paint on the car or on fuel rail covers. It looks like the pink panther got stuck underneath the covers.
You can see in this picture the insulation around the oil fill cap.

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Old Oct 21, 2009 | 01:56 PM
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in fact; people remove the fuel rail covers - to keep heat from building up in the ignition coils.
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Old Oct 21, 2009 | 02:19 PM
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Originally Posted by Len90Vette
Has anyone ever seen fuel rail covers that have fiberglass insulation underneath them? If so, what is the purpose?
Nope!
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Old Oct 21, 2009 | 04:54 PM
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Never seen that.
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