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Question about hood insulation

Question about hood insulation

Old August 30th, 2018, 07:42 PM
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Question about hood insulation

Greetings all ye Oldsmobilers!

One of the things I need to do to my 72 Cutlass Supreme is replace the underhood insulation. My concern is heat. Right now there is no insulation and my 455 will cruise at 70mph all day long and she holds steady around 185 degrees. If I add the hood insulation willl that affect the underhood temperature and thus increasing the running temperature? It does have twiin hood scoops but I don't want to cause myself any issues.

Thanks,
Dave
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Old August 30th, 2018, 11:34 PM
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Don't worry about it I drove my 70 Cutlass SX for 5 years without one. Just make sure it has a shroud and good clutch for the fan. If your car is judged in a Olds Nats YES install it.
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Last edited by Gerald Nickels; August 30th, 2018 at 11:58 PM.
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Old August 31st, 2018, 06:12 AM
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Originally Posted by 72455 View Post
Greetings all ye Oldsmobilers!

One of the things I need to do to my 72 Cutlass Supreme is replace the underhood insulation. My concern is heat. Right now there is no insulation and my 455 will cruise at 70mph all day long and she holds steady around 185 degrees. If I add the hood insulation willl that affect the underhood temperature and thus increasing the running temperature? It does have twiin hood scoops but I don't want to cause myself any issues.

Thanks,
Dave
No factory fiberglass hood came with insulation. The insulation used on metal hoods was more for sound deadening than thermal control.
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