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Old 07-06-2009, 07:36 PM   #1
Raymo
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"Oil Canning" Hood

Anyone have the problem w/your hood "oil canning"? You know, vibrating when you hit a bump. My 67 hood has no insulation in her like a new truck. What have you done to put an end to the vibration?
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Old 07-06-2009, 07:38 PM   #2
3kidsnotime
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Re: "Oil Canning" Hood

I cut one of the braces out a doner hood and add a third in the center, matches and looks oem to the untrained eye.
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Old 07-06-2009, 07:40 PM   #3
Longhorn Man
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Re: "Oil Canning" Hood

there's supposed to be material between the ribbing and the sheet metal, keeps this to a minimum.
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Old 07-06-2009, 08:14 PM   #4
Raymo
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Re: "Oil Canning" Hood

What kind of material? All that's in mine is what looks like small pcs. of a cardboard box.
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Old 07-06-2009, 08:24 PM   #5
passthebuck
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Re: "Oil Canning" Hood

The material is a type of roughly 3/8" thick spongy rubber.
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Old 07-06-2009, 08:34 PM   #6
ebfabman
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Re: "Oil Canning" Hood

Also don't overlook the hood hinges. Make sure the hood hinges are well lubricated so the hood opens easy and smooth. I've seen hoods bend in the middle when they were kind of "forced" open due to rusted or nearly frozen hinges. Repeated opening a hood with stiff hinges will permanently cause that "brokeback" bow in the middle of the hood.
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Old 07-06-2009, 09:07 PM   #7
463
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Re: "Oil Canning" Hood

what i did was removed the factory foam and used a tube of urathane to squeeze in between the hood and the hood support. it's a 3/8 inch by 3/8 of an inch on both sides of the two hood braces. then smoothed it out nice when it was still wet. it's been there since 1984 when i restored my truck and no problems since.
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Old 07-06-2009, 09:12 PM   #8
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Re: "Oil Canning" Hood

i also use fluid film on all the moveing points. that's two fingers to lift the hood. link:http://www.sp3sales.com/fluidfilmaerosolspray.aspx
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Old 07-06-2009, 10:22 PM   #9
69GMCLonghorn
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Re: "Oil Canning" Hood

Just go on to LMC Truck.com. They have the insulation kits for about $30 I think. I bought a set when I did my truck and it made a world of difference!
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Old 07-06-2009, 11:04 PM   #10
Raymo
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Re: "Oil Canning" Hood

Thanks everyone! Some great ideas.
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Old 07-06-2009, 11:39 PM   #11
Jim_PA
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Re: "Oil Canning" Hood

Quote:
Originally Posted by passthebuck View Post
The material is a type of roughly 3/8" thick spongy rubber.

Yep -- my truck had none, it resulted in heavy waving and rippling of the hood when driving. I robbed some of these spongy rubber strips, wedged them in place, and about 95% of the flexing is gone. Good enough for me
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Old 07-07-2009, 12:20 AM   #12
red71c10
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Re: "Oil Canning" Hood

So the insulation (only $12 from LMC by the way) will cut down on the hood vibrating? Mine only does it when I'm stopped in gear. Park or neutral or when I'm moving is ok, but at lights and stop signs it vibrates a lot!
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