have a chevelle in which I decided to redo the interior. discovered that some "genius" had drilled 7/16 inch holes in the floor pan, looks like they were for racing harness or seat brackets. I want to fill the holes, or cover them with something. I dont want moisture to get underneath my new carpet! What do I use to fill them up or cover them up? Is there a chemical out there I can use to fill the holes or bond a plate of steel over them? Help.

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1970 Chevelle 400hp 350ci, th350, locking 10bolt. Go Earnhardt Jr.! "The importance of material things is invaluable if you loose the things essential to the spirit of life."

I would say that your best bet would be is to weld the holes up. If you don't have a welder you could rent one or find a friend that has one and get him to come over and weld them up for you for a couple of cold ones.

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Nathan Brandt
The more cubes the better!!!
70 SS 396 4spd under restoration
71 SS 454 clone 8.8 1/8 on pump gas and 8" slicks
60' 1.949 & 77 MPH
88 IROC-Z 305/5spd restoring for my daughter
Team Chevelle # 1143
ACES # 5391
My 71 SS 454 clone (http://www.chevelles.com/showroom/nate71.jpg)

I would say welding is best. Get a piece of copper to back the hole up from the bottom side. Hold it up there tight (maybe w/ a floor jack)and weld the hole up from the top side. The weld won't stick to the copper.

If the holes are small and a welder isn't accessable, I'd use a very small fiberglass patch and some POR 15. I did this for a few pinholes on my floor ( and a 2" hole) and it worked great and is weather tight.

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David Reinecke - aka - FINE 68
1968 Chevelle 300 Sport Coupe Deluxe
http://home.att.net/~thereineckes/

If you do a search in the body forum there are a few discussion about the bonding agents available and to their quality.

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Deon Knecht
72 Malibu 350 that has been bored out to 4.251 on a 4" stroke.

<A HREF="http://home.sc.rr.com/deon" TARGET=_blank>
My Website Last updated on 10/28/2002 </A>

what is a fiberglass patch? and where do I get one? Also, I thought por 15 was for sealing metal from rust, not cementing two metals together. I had a thought of using small steel squares with JB Weld. Also, could I use a propane torch and a wire clothes hanger as the welding rod to weld the steel to the floorpan? Is this strong enough?

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1970 Chevelle 400hp 350ci, th350, locking 10bolt. Go Earnhardt Jr.! "The importance of material things is invaluable if you loose the things essential to the spirit of life."

I had the same thing. I went to the hardware store and bought a fiberglass sheet, can of fiberglass and curer(harding solution), sanded off the old rust/paint,cleaned it with rubbing alcohol,let dry. Now put the fiberglass from the can down on something that you can mix the curer with(piece of glass)mix the two together and cover the hole,just enough to cover the hole and about 2-3 inches further out, now quickly put a precut sheet of the fiberglass over the hole and spread it out.Put a coat of the fiberglass liquid that has the curer already added on top of the fiberglass material cover the material completely working from the center out. Wait an hour and if the patch isn't hard you didn't use enough curer. I did this on several holes in the floor and it sealed great. Now lay the carpet down. One more thing, read the instruction on the can of fiberglass it will tell you how much curer to use. I guess you can call this a poor mans welder.((:>))

I guess you realize this thread is 8 1/2 years old - right, Tom? ;)

I guess you realize this thread is 8 1/2 years old - right, Tom? ;)
Still good information for us amatures:thumbsup:I have a couple of pin holes in my 68 trunk floor that I might try this method with thanks guys.:beers: