Preparing Bulkhead for Galvanizing - Defender Source
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  #1  
Old November 16th, 2012, 07:04 PM
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John Crouse
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Preparing Bulkhead for Galvanizing

So did all Defender bulkheads come slathered in caulk? I don't mean the black tacky strip caulk. The one I'm working on is out of a NAS D110 and it has white fairly rigid caulk generously spread over the seams and in the corners.

My plan is to cut out the big pieces and see what the paint stripping bath does to the rest. Thoughts?

Series bulkheads didn't have this crap......
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Old November 16th, 2012, 07:18 PM
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burn the caulk off with a weed burner or propane / mapp torch
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Old November 16th, 2012, 08:01 PM
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Just take it to the stripper. All that will come off. Then do the demolition.
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Old November 17th, 2012, 08:07 AM
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The new bulkheads I have seen do not have the seam sealer. The used ones do because if you do not have the seams sealed they can leak. When I took mine to have it galvanized they wanted everything off of it. It seems that the acid bath doesn't last as long if they get paint and other stuff in the bath. Also as a note if it is a used bulkhead you will get a bunch of debris in the finish unless you dip it a few times to get the stuff out of it. They ended up galvanizing it a couple of times to get the final finish right.
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Old November 17th, 2012, 10:16 AM
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John Crouse
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Once I get the large chunks of caulk off its going to A-1 Metal Strippers for the paint stripping bath. It will be clean and tidy before I take it to the galvanizer.
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Old November 17th, 2012, 10:20 AM
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There was a campaign to caulk bulkheads. The four I have seen have varying levels. One looks like it had four tubes used. They all still rusted.
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Old November 17th, 2012, 11:06 AM
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John Crouse
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Thanks Ron. That's what I was wondering.
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Old November 17th, 2012, 12:56 PM
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you'll need to get it off to galv it. But, worth putting back on as I have had streams of water cascading down the inside of both series and defender firewalls driving through heavy downpours or even just stitting parked up. Wondered why the four way flashers were goiung when I hadn't been in the car for days. Found the flasher relay filled with water, opened it up and cleared it out. Replaced the chipped and failing seam sealer right above that and no problems since. When I do repairs I try to layer them so that water runs down and over the overlapped portion and not down into the seam. But the factory did not always do that so the seam sealer is a good idea. Put it on over your primer and under your paint.

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Originally Posted by 61rover View Post
So did all Defender bulkheads come slathered in caulk? I don't mean the black tacky strip caulk. The one I'm working on is out of a NAS D110 and it has white fairly rigid caulk generously spread over the seams and in the corners.

My plan is to cut out the big pieces and see what the paint stripping bath does to the rest. Thoughts?

Series bulkheads didn't have this crap......
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