Any Solutions to 55/56 Hood Oil Canning

[bosco]

I guess in 1956 these trucks didn't cruise at 70 mph, so the hood oil canning was not an issue. Wanting to reach out to this community to see if anybody has come up with a solution?

I did find this solution and maybe able to fabricate a similar brace.
http://67-72chevytrucks.com/vboard/s...541132&page=21
(post 506)

But, wanted to find out if there are different solutions for this issue. Thanks folks.

[mr48chev]

That's a pretty heavy chunk of iron to hang on a hood. I had a 57 Panel with a hot 327 that I drove hard and didn't have that issue with so I haven't experinced it.
I'd agree that a brace with maybe some dense foam pads between it and the bottom side of the hood should keep the oil canning down.

[Dan in Pasadena]

Never had any oil can with mine. Someone did something to stretch the metal with yours to have that happen.

[bosco]

Originally Posted by mr48chev

That's a pretty heavy chunk of iron to hang on a hood. I had a 57 Panel with a hot 327 that I drove hard and didn't have that issue with so I haven't experinced it.
I'd agree that a brace with maybe some dense foam pads between it and the bottom side of the hood should keep the oil canning down.

I was thinking about using aluminum to hold the wait down, and not as large a brace. Was thinking of a dense foam as well.

Originally Posted by Dan in Pasadena

Never had any oil can with mine. Someone did something to stretch the metal with yours to have that happen.

Looking at the hood there are no issues that I can see, and if there was any body work done I would think it might have cracked. It starts to flex pretty good just over 70 mph. Honestly the hood looks great. If I ever repaint, it can always be reworked to shrink the metal.

[whitedog76]

What about Berliner or lizard skin on the underside?

[dsraven]

if you look under a newer vehicle's hood you will see they used a sheet metal stamped brace and took up the gap between the brace and the hood with some adhesive like seam sealer, some have a foamy looking stuff in there that foesn't stick to the hood. a dab here and there. you could use some wax paper between the hood and the adhesive so it doesn't actually stick to the hood and then there would be less chance of distortion on a hot day. even some spray foam insulation would likely work then, a little dab here and there.

[bosco]

Originally Posted by whitedog76

What about Berliner or lizard skin on the underside?

I have also thought about bedliner, but wasn't sure how much weight that may add and would it keep the hood from sagging.

Originally Posted by dsraven

if you look under a newer vehicle's hood you will see they used a sheet metal stamped brace and took up the gap between the brace and the hood with some adhesive like seam sealer, some have a foamy looking stuff in there that foesn't stick to the hood. a dab here and there. you could use some wax paper between the hood and the adhesive so it doesn't actually stick to the hood and then there would be less chance of distortion on a hot day. even some spray foam insulation would likely work then, a little dab here and there.

I like the expanding foam idea between the brace and the hood. I think it's not going to take much and it would be light weight.

Thanks for all the ideas. Please keep them coming.

[MARTINSR]

If yours has that brace going through the middle of it, (I don't know those trucks well) then just try putting a piece of cardboard or something between the brace and the skin and see if that stops it. If it does then a piece of plastic or tar paper or something like they originally had may do it. I have had hoods do this where things have just over the years changed a little so the gap is increased just a hair, one 1/16" piece of rubber and it's gone.

Brian

[whitedog76]

more louvers

[bowt1ed]

Originally Posted by MARTINSR

If yours has that brace going through the middle of it, (I don't know those trucks well) then just try putting a piece of cardboard or something between the brace and the skin and see if that stops it. If it does then a piece of plastic or tar paper or something like they originally had may do it. I have had hoods do this where things have just over the years changed a little so the gap is increased just a hair, one 1/16" piece of rubber and it's gone.

Brian

Brian, the 55/56 didn't have any bracing front to rear down the middle, only the cross braces. That's what often causes the issue, with a lot of rather flat panel unsupported. In 57 the side ridges helped eliminate it. I added that brace from a 57 Bel Air.

Cheers, Jim

[mongocanfly]

whatever you do bosco DONT use expanding foam behind a brace if you decide to ad one...you put a brace in there and squirt expanding foam behind it then your gonna have a big hump in your hood....they do make a non expanding foam ....but.....

[bosco]

Originally Posted by mongocanfly

whatever you do bosco DONT use expanding foam behind a brace if you decide to ad one...you put a brace in there and squirt expanding foam behind it then your gonna have a big hump in your hood....they do make a non expanding foam ....but.....

That makes sense. I am sure I can find material to fit the gap. Mainly in toward the center to rear of the hood.

[gotmotors]

Raptor bed liner worked great for me. No more floppy hood!

[Black_Sheep]

Louvers...

The solution offered by bowt1ed is a good one. I would go one step further and use an adhesive caulk to bond the hood to the brace. A few well placed daubs of Sika-Flex on each side of the brace and you'll be good to go

[_Ogre]

apache hoods came with the brace down the center
it still flexes quite a bit anytime you get much over 80 mph

[bosco]

Finally was able to install my fix for the hood oil canning. Appreciate everybody's help and ideas. Here's the final solution. Fits right up against the hood, used some dabs of silicon along the way to provide some vibration dampening.

[bowt1ed]

Originally Posted by bosco

Finally was able to install my fix for the hood oil canning. Appreciate everybody's help and ideas. Here's the final solution. Fits right up against the hood, used some dabs of silicon along the way to provide some vibration dampening.

Looks good bosco. I see you bolted the l bracket to the brace, in lieu of welding it.

Jim

[MARTINSR]

Originally Posted by bowt1ed

Looks good bosco. I see you bolted the l bracket to the brace, in lieu of welding it.

Jim

Which was GREAT thinking huh! It looks good, he did an awesome job on that one, probably should start selling them.

Brian

[bosco]

Originally Posted by bowt1ed

Looks good bosco. I see you bolted the l bracket to the brace, in lieu of welding it.

Jim

Yeah. My welding skills need some work. I used pan head bolts so they fit cleanly under the brace. Used lock-tite to make sure nothing comes loose.

[MARTINSR]

Right on, hopefully what you dabbed between them stays flexable. From the factory they use a soft foam because if what you put "glues" the two together you will end up with a "ghost line" on the top that you will be able to see.

Brian

[bosco]

Thanks. It fit really well. Yes the silicon is a soft when cured. Didn't use that much, just enough to eliminate any vibration.

[MARTINSR]

Cool!

Brian