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Topic: Under Hood Paint

in Forum: C3 Engines

Under Hood Paint

Posted: 8/12/12 11:04am Message 1 of 13
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Indianapolis, IN - USA
Joined: 9/3/2006
Posts: 2429
Vette(s): Silver 1974 Convertible - L82 4 speed Low miles (was only 8,900 when I bought it in March 2006) - Now 54K miles. Original owner bought it as an investment for son's college expenses. 2008 Jetstream Blue Convertible
Instead of stealing The Rook's thread on the under hood specialized mats, I'll start a new one to ask what folks out there know about custom paint jobs inder the hood.
 
It's my understanding that the hood insulation mat is there because the engine could get so hot, it could buble the paint on the outside of the hood.  Is that true?
 
My preference would be to get rid of the mat and have a custom paint job done inside.  If I were to do that, is there something that could be put down before the paint to protect the outside of the hood?  What about the custom paint I have put on the inside?  What's the danger of my 1974 L-82 engine damaging the design?  I recently had my engine repainted with Chevy Orange that is supposed to stand up to heat, and I know it has baked off in a few spots.
 
Interested in anyone's experience or thoughts on this topic



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Re: Under Hood Paint

Posted: 8/12/12 2:02pm Message 2 of 13
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Holland Patent, NY - USA
Joined: 6/3/2008
Posts: 4421
Vette(s): #1 *1980 White, Red interior 14,000 mile #2 *1980 Red, Oyster interior 93,000 miles Resto project car, rebuilt to 383 stroker
Good question, my 80's hves no insulation on the underside.
Evil Smileebo




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Evil Smileebo

Re: Under Hood Paint

Posted: 8/12/12 4:52pm Message 3 of 13
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WEST SENECA, NY - USA
Joined: 12/3/2001
Posts: 2379
Vette(s): 1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.
Yep, '80-'82's did not have hood insulation. But I'll tell you what. After I had my car painted I noticed that the hood lost its shine compared to the rest of the car. A few years ago I put an L88 style hood on the car and it was painted with the same batch of paint as before. We did take some silver foil faced insulation cut to fit and put a border around it to finish off the edge. The paint on the hood stayed as shiny as the rest of the car now. The underside of the hood was finished and painted black and clear coated.

If you click on the link below my signature pic it will take you to my Car Domain. Scroll down and there is a pic of the underside of my hood. Maybe this might give you some ideas of what you may want to do.

Sarge




GEN III 5.7L "LS6" Engine swap
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Re: Under Hood Paint

Posted: 9/17/12 4:53am Message 4 of 13
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Greer, SC - USA
Joined: 3/13/2012
Posts: 264
Vette(s): 1978 Black with Viking mural painted under hood AM/FM/CB radio, T-top and a 2013 Cyber Gray Grand Sport Coupe, 2LT for my daily driver
Marshall,
I apologize for not seeing this thread sooner.  do you remember the Viking Mural under my hood?  The artist used high temperature paint.  I left four prongs under the hood for the insulation blanket so I could attach it for long runs, but that blanket marred my brand new chrome air cleaner cover going to charleston, so now I do not use it.  I have seen no detremintal affects on the paint of the hood from the outside, nor on the mural.  Everytime I do pull into the garage, I pop the hood and use a plastice coffee bucket to keep the hood open a little bit to assist in letting any heat escape.
Sorry that I did not answer you sooner...and what is my experience may not be typical...remember, I am just dumb-bell.
 



Warning: The surgeon general has declared that it is NOT unhealthy to smoke your competition AND I just discovered that my corvette is a hybred.  It burns gas and rubber! 

Re: Under Hood Paint

Posted: 9/17/12 2:27pm Message 5 of 13
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New Albany, OH - USA
Joined: 8/17/2010
Posts: 173
Vette(s): 1980 Coupe / Snowcrest White / L48, 350 / Comp Cam / Edelbrock Heads / Cyclone Intake / Holley Carb / Holley Fuel Pump / Patriot Headers / Dual Exhaust / Magnaflow Mufflers / 1964 Coupe / Riverside Red / L76, 327, 365hp

Whenever possible, I always open the hood completely after a drive and leave it that way until the engine has cooled.  I have no insulation on my '80 and have never seen any evidence that the paint has diminished.




Chuck

Re: Under Hood Paint

Posted: 9/21/12 3:29pm Message 6 of 13
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Worthington, OH - USA
Joined: 8/4/2009
Posts: 74
Vette(s): 1972 Black C3 automatic with red interior. Options include AC, PS, PB, Am/Fm Wonderbar stereo.

I do not have any matting or thermal barrier under the hood.  When I had the car painted, the inside of the hood was painted black and clear coated (to match the car).  This was done a couple of years ago and I have not noticed any problems.  Although I must admit, you do now have me a little worried.  To my knowledge the ’72 cars didn’t come with a mat and never occurred to me to add one, since none existed when the car came from the factory.




Re: Under Hood Paint

Posted: 9/22/12 11:39am Message 7 of 13
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Grapevine, TX - USA
Joined: 8/26/2006
Posts: 1522
Vette(s): 1972 LT-1 convertible with factory air. 2017 Black Rose Grand Sport convertible.
Mine didn't come with mat.  Clear coat paint on top is just fine.


   

Re: Under Hood Paint

Posted: 9/22/12 2:20pm Message 8 of 13
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Worthington, OH - USA
Joined: 8/4/2009
Posts: 74
Vette(s): 1972 Black C3 automatic with red interior. Options include AC, PS, PB, Am/Fm Wonderbar stereo.
It looks like you too have a 1972.  Only difference is yours appears to be a big block car.  Very nice.


Re: Under Hood Paint

Posted: 11/18/12 3:37pm Message 9 of 13
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Rochester, NY - USA
Joined: 6/12/2012
Posts: 95
Vette(s): 1980 L- 82 fully restored and upgraded.
I have never seen or herd of engine heat boiling or bubbling paint off a hood . Personally to somehow doubt it will be an issue unless you have a few turbos under there .. 


1980 , ZZ430 , 3.92 rear , 700R4 2400 stall NEW EZ EFI 

Re: Under Hood Paint

Posted: 11/19/12 10:18am Message 10 of 13
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Poquoson, VA - USA
Joined: 11/20/2004
Posts: 1023
Vette(s): 73 Conv, Blue-Green/White Top - 454, M21 - Dark Saddle Leather, Power Windows, A/C, Tilt/Tele, AM/FM St. (orig. and sounds like it too).#2 -- 2007 Coupe,3 LT package, Z51 option, Victory Red, Ebony Int. Clear Top.
I don't know if this is related... but I know a few guys with C-2's and no insulation, they claim... when they open the hood at shows... the sun reflecting off the chrome breather will affect the paint on the opposite side of the hood. Most of them put a towel over the breather..


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