65 BB hood frame loose

[Bill W.]

DSC_1490.jpgDSC_1491.jpgDSC_1497.jpgDSC_1496.jpgIt seems many 65 /66 BB hood skins are not bonded to the underside . I found a 3M product that does a great job . 3M # 8115 panel bond . It looks good seems strong , its been on mine about a week . We used it at work to bond roofs , door skins , etc. The only hard part is cleaning all the old bond off first .

[Wayne W.]

Re: 65 BB hood frame loose

Problem is, they were never bonded there, and bonding tends to suck the panel down and cause ripples in the hood.

[James W.]

Re: 65 BB hood frame loose

Bill,

Where did you purchase this 3M product?


Thanks,

James West

[Gene M.]

Re: 65 BB hood frame loose

I used a similar product by Locktite. The only thing different I did not firmly clamp together with glue. The glue does not dry rock hard so there is always some give since fiberglass does want to "move".

[Mike G.]

Re: 65 BB hood frame loose

Problem is, they were never bonded there, and bonding tends to suck the panel down and cause ripples in the hood.

Exactly. That's why polyurethane roof/flashing sealant is the correct choice for this application.

[Bill W.]

Re: 65 BB hood frame loose

You can get it and any body shop supply store that sells 3M .You do need a special gun to use it . It does flex slightly . I have two other hoods a 66 grey BB that there is no bond on ???and a new GM hood I bought in about 1981 that has bond . On my 65 white glass hood there was bond residue and you could see an outline where the bond had been before the hood was primed at the factory . It still had the factory prime and black out on it . I think it was bonded when new . The 66 hood I don't know ?

[Michael M.]

Re: 65 BB hood frame loose

I used 3M 06564 4200 fast cure. It is a Marine polyurethane. It will stay pliable but firm even though it does have some adhesive features. Mine is not a judged car so don`t send the emails. Thanks Mike

[Bill W.]

Re: 65 BB hood frame loose

Hi Mike , do you think your hood had the bond when new . What color glass or serial number was it ?

[Michael M.]

Re: 65 BB hood frame loose

Hi Bill I saw no evidence of it but this is actually a 66 hood going on my 65 small block car.

[Michael M.]

Re: 65 BB hood frame loose

Bill it was gray in color. Or a dirty white color. I put wedges under the frame to pick it up and put a puddle of the urethane down and took the wedges out so that it pushed the material out a little. it looked close to what I had seen in pictures of original. I don`t think it ever had any by the original pictures. Mike

[Wayne W.]

Re: 65 BB hood frame loose

You can get it and any body shop supply store that sells 3M .You do need a special gun to use it . It does flex slightly . I have two other hoods a 66 grey BB that there is no bond on ???and a new GM hood I bought in about 1981 that has bond . On my 65 white glass hood there was bond residue and you could see an outline where the bond had been before the hood was primed at the factory . It still had the factory prime and black out on it . I think it was bonded when new . The 66 hood I don't know ?

Bill. You would have seen evidence of dum-dum, non hardening material to cushion and dampen vibrations, but it was not bonded.

[Bill W.]

Re: 65 BB hood frame loose

Wayne . You could be correct ,the old dum dum was allot heavier and held up to heat better . The new stuff even 3M gets hot and runs .It also gets brittle when it gets old .

[James W.]

Re: 65 BB hood frame loose

Guys,

Here are some pictures I took of a red '65 big block at Bloomington and a green big block Duntov/Bowtie car at the 2008 NCRS National Convention. These are the best pictures I could find of the bottom side of the hood bonding material. Hope it helps.


Regards,

James West

[Bill W.]

Re: 65 BB hood frame loose

Thanks James. The photos of the green one looks like mine did ,kind of a brownish yellow hard caulk of some kind . It is also in the same spots as mine was. I think Im good .