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#157413 - October 21st 2007 4:36 am Yet another rust treatment question
Ram4ever Offline


Registered: March 26th 2007 8:05 pm
Posts: 3671
Loc: Dundee, Michigan
Hi everyone, I've got a few more body work / rust control questions.

I finally got the floor peeled up to the front seats in the '81 Dodge B250 maxivan tonight, (I love cold weather!) and was I ever surprised. No major rust, but it looks like it had a rear bench seat installed at one time prior to the conversion. The idiots that built the conversion didn't even bother to plug the eight 1/2" holes; they simply ran the wood flooring right over the open holes!! Well, of course this caused the wood in those areas to rot, and there was some light surface rust for 1-2" around each hole, but not terrible. I scraped the paint back till no rust was visible, then acid etched the areas.

The question is, how should I patch/plug those holes... should I weld, or use 1/2" plastic undercoating hole plugs and seam sealer.

If I weld, would anyone care to tell me what company made that amazing undercoating that was on these Dodge van's underbody? (Or even if there was a Chrysler part number for it?) The heat from welding would ruin the undercoating for some distance, so I'd have to replace quite a bit of undercoating. I do have on-hand some of Eastman's spray gun type undercoating and also their body cavity wax. (Haven't tried them yet though...) Are those likely to be sucessful?

Oh, and for even more fun, the conversion derelicts also didn't apply seam sealer to the two table post sockets mounted in the floor... they sprayed a bit of rubberized undercoating over the part of the sockets that stuck outside, from underneath, and called it a day. What Jerks!! Of course it leaked horribly. Astonishingly, no rust at all, but it rotted even more of the wood flooring.

As much work as it's been to rip this van apart, I'm glad I did. I've been able to head off quite a few nasty problems, and keep me & any future guests from breathing in tons of black mold!

Clear skies!
_________________________
-It's been such a LONG TIME... 1981 Dodge Ram B250 Custom Sportsman Maxi Van

Bringin' her back - the construction never ends!




It's what you learn after you know it all, that counts...

Are you living to work, or working to live?


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#157419 - October 21st 2007 9:53 am Re: Yet another rust treatment question [Re: Ram4ever]
NateNCBV Offline

Administrator

Registered: August 23rd 2005 12:00 pm
Posts: 20415
Loc: Brooklyn Park, Maryland, USA
Of course the best fix would be to weld a patch over the holes, but a fiberglass patch wouldn't be horrible.

As far as undercoating goes, I've used "parts store" undercoating many times in the past and it's been good stuff.
_________________________
Nate Breece
2%
North Chesapeake Bay Vans
--------------
1994 Dodge B250 Elk Conversion (5.2L/A518)
2008 Dodge Caravan (3.8L)

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#157432 - October 21st 2007 12:47 pm Re: Yet another rust treatment question [Re: NateNCBV]
Reed Offline
carpal tunnel

Registered: August 27th 2001 12:00 pm
Posts: 8437
Loc: Fircrest, WA
Run a bolt through the holes for the bench seats. For the table posts I say use a mixture of silicone and spray on undercoating.
_________________________
Windows- they're what make a van worth owning!

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#157453 - October 21st 2007 3:47 pm Re: Yet another rust treatment question [Re: Reed]
Ram4ever Offline


Registered: March 26th 2007 8:05 pm
Posts: 3671
Loc: Dundee, Michigan
Doggone Reed, you've had a Mensa moment there! I've been so stuck in the plug or weld mentality that it didn't occur to me to run bolts through them!!
Guess I should get more sleep...

I think I'll do that, then seam sealer them. That would also leave me the possibility of using the holes in the future if I ever needed to. Since I'm using 3/4" plywood for my new floor instead of the original 1/4" plywood, I have plenty of space to drill relief holes for the bolt heads, so they won't push up on the new plywood.

Thanks!

Clear skies!
_________________________
-It's been such a LONG TIME... 1981 Dodge Ram B250 Custom Sportsman Maxi Van

Bringin' her back - the construction never ends!




It's what you learn after you know it all, that counts...

Are you living to work, or working to live?


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#157458 - October 21st 2007 4:08 pm Re: Yet another rust treatment question [Re: Ram4ever]
Reed Offline
carpal tunnel

Registered: August 27th 2001 12:00 pm
Posts: 8437
Loc: Fircrest, WA
no, I just have had to plug a couple holes in the roof of my 84 Ford that I think were for a T.V. antenna and a C.B. antenna but the antennas were MIA when I bought the van. ;)

Do you really need 3/4 ply? 1/2 ply is cheaper, lighter, and strong enough to be a subfloor. Unless you are going to be using the flooring as a base to screw things into I would stick to 1/2 inch. if you are going to use the floor as a load bearing structure then i would go to 3/4.

Pics!
_________________________
Windows- they're what make a van worth owning!

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#157462 - October 21st 2007 4:38 pm Re: Yet another rust treatment question [Re: Reed]
Dodges 3 Offline
Li'l Blue Wagon

Registered: June 09th 2006 12:00 pm
Posts: 6501
Loc: Kitchener, Ontario, Canada
When I did conversions, we used to use a putty on the table bases. It came in a roll, and you'd just wrap it around the bottom part a couple times, put base in hole, and screw her down.
_________________________
1991 Dodge RamVan 318 Shorty with 2 Gullwings.
http://www.cardomain.com/ride/2673850
1982 Dodge Ram Maxi 1 ton
http://www.cardomain.com/ride/2940482
1986 Dodge RamVan shorty, with 318 and 4spd. STANDARD


Member of Rebelvanners Canada

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#157463 - October 21st 2007 4:49 pm Re: Yet another rust treatment question [Re: Dodges 3]
Reed Offline
carpal tunnel

Registered: August 27th 2001 12:00 pm
Posts: 8437
Loc: Fircrest, WA
Hmmm. Would plumber's putty work? What about body seam sealer? You can buy 3M brand seam sealer at autobody shops.
_________________________
Windows- they're what make a van worth owning!

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#157471 - October 21st 2007 6:26 pm Re: Yet another rust treatment question [Re: Reed]
Billvill Offline
old hand

Registered: April 17th 2001 12:00 pm
Posts: 1097
Loc: West Chester PennsylVANia USA
I would say the easiest thing to do would be to sand blast the rusted area with a small sand blaster. Paint the exposed metal with a good primer and fill the holes with plastic plugs. The kindof plugs you see in doors and quarter panels. for rust prevenitive applications. You actually may have to open the holes up just a tad for that style plug to fit.
_________________________
Take Care, Billy

Have Van Will Travel


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#157492 - October 21st 2007 8:45 pm Re: Yet another rust treatment question [Re: Billvill]
Ram4ever Offline


Registered: March 26th 2007 8:05 pm
Posts: 3671
Loc: Dundee, Michigan
I'm going to be bolting all kinds of things to the floor, (for both structural and safety purposes) trying to silence the ride as much as possible, and occasionally carrying super heavy items - 3/4" is good stuff for all that.

You've got a good point Reed, that 3M sealer that comes in ropes might be a really good solution for the table pockets... I'll see if the paint supply shop has got any of it tomorrow. I'll be needing some for when I repaint to reseal the Conversion windows anyway.

Billvill, I do have the Eastman brush-on seam sealer and a bunch of 1/2" undercoating plugs. I do have a portable sandblaster, but I already acid etched the areas, so sandblasting would be a bit redundant. I'm going to hit the entire floor with two coats of Zero-rust, and see how that works out. Once it's dry, I'll plug the holes, and apply the seam sealer. I'm not sure how well the seam sealer will grip the hole plugs, so I'm thinking I'll go the route of Reed's suggestion with the bolts.

The paint's going on the floor tonight - wish me luck!

Clear skies!
_________________________
-It's been such a LONG TIME... 1981 Dodge Ram B250 Custom Sportsman Maxi Van

Bringin' her back - the construction never ends!




It's what you learn after you know it all, that counts...

Are you living to work, or working to live?


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#157503 - October 21st 2007 10:49 pm Re: Yet another rust treatment question [Re: Ram4ever]
Starlord Offline
veteran

Registered: August 08th 2005 12:00 pm
Posts: 2950
Loc: San Antonio, Tx.
You could try carriage bolts, then you wouldn't have large heads sticking up, just low rounded ones.
_________________________
2005 E350 Turbo Diesel, 1993 G20 350 Chevy
Why is it that when I press 1 for English, I still can not understand the person on the other end????

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