SherpaPilot

Greetings to all. It was such a beautiful day in Texas, I uncovered the 65 coupe and drove it for about an hour, running a few errands. I noticed the hood of my car has developed a little bit of a vibration. After looking at the metal framework that supports and strengthens the underside of the hood , I noticed mine has come loose and obviously needs to be re-attached. What is the very best way to do this??? I know I can reinforce the existing bond with something new and as long as it is neat can be touched up with the appropriate paint. I'm just wondering if there is a preferred bonding agent that is better than something off the shelf. The vibration if left unchecked could result in paint cracks in my hood which I really want to avoid.
Thanks for any advice in this area. It is greatly appreciated.

vjjack04

Sherp,
Take a picture of the area that you are referring to...especially the metal framework...

gbvette62

The only metal in the hood are the 5 riveted in nut plates, that the hinges, latches and hood support bolt to. There is no "metal framework".

If you're referring to the "X" reinforcement on the underside of the hood, it is fiberglass, just like the skin. GM never "bonded" the reinforcement to the underside of the hood skin. I forget exactly what GM used, but it wasn't a bonding agent or glue. I believe it was some kind of Dum Dum or tar type material, that secured the reinforcement to the skin, and yet still allowed the two pieces to flex a little, and move.

Bill32

Nope, use the black roofing caulk/adhesive from Home Depot.

Recommended by John Z.

NightshiftHD

Correct. Its only bonded to the surface panel around the outside periphery of the underside reinforcement. The factory used a panel deadener called "gumdrops" under the inside tabs of the reinforcement. If you bond these inner tabs ... it will cause "bond burn-in" and you will (eventually) see the spots on the outside surface where you bonded it. This is caused by the heat from the exothermic reaction during the bond adhesive curing process. Don't risk it ... use something flexible and non-hardening like 3M black strip caulk or black roofing caulk. Bill

Velox

As I recall this is what JohnZ recommended "DAP Premium Roof & Flashing Sealant 50 YR" and this is what I have used, works great

Bill32

Yep, that's the stuff.

SherpaPilot

Hey, I appreciate the advice. I'll pick up the DAP stuff in the morning. This will be an easy repair. My mistake on the underside bracing. Guess I just assumed it was not fiberglass.

Bill32

It's glass but that's OK.

The DAP will stay a little flexible and that's a good thing. The hood skin does not have to be bonded tightly to the bracing.

Jackfit

Hi, only put the caulk where the tabs are, not on all of the surfaces !

Jack