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Old 05-11-2016, 07:44 PM   #1
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1975 31' Sovereign
Minneapolis , Minnesota
Join Date: Mar 2016
Posts: 2
Bolts or Screws in 1975 Sovereign

I just completed a "shell on" subfloor replacement in my 1975 Sovereign. I tore out all of the old, rotted subfloor by cutting the bolts in the C-channel, reinsulated and replace the subfloor with 3/4" new plywood. I was able to complete this with the belly pan on. However, I now need to secure the shell to the chassis.
Is there anyway to attach the frame to the chassis through the subfloor without removing the belly pan? Is it possible to use self tapping screws through the C-channel and into the chassis in order to avoid needing a bolt or is this far too dangerous? Any insight would be appreciated.
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Old 05-11-2016, 08:02 PM   #2
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1972 31' Sovereign
1975 31' Excella 500
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Benton , Arkansas
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IMHO 1/4" self tappers will work fine if you miss the existing holes.

There will be people who will disagree with me about that though.

Superat stultitia.
The fact that I am opinionated does not presuppose that I am wrong......

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Old 05-11-2016, 08:29 PM   #3
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1976 27' Overlander
Tampa , Florida
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Hmmm.... I dont know. Thats a fairly important fastening point to the monocoque design... I personally might consider that in a pinch for a few places because you replaced sections of the subfloor, but for the whole thing I'd be leary.

On the '75, you might be able to leave the rubrail on, and just drill out the rivets underneath the outriggers and along the main frame rail to pull them free enough to get at the underside of a bolt/nut fastener.

The rubrail removal to do it is definitely alot of work. I think I could get to mine leaving the rubrail alone.
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Old 05-12-2016, 06:15 PM   #4
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1975 31' Sovereign
Minneapolis , Minnesota
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Thank you both. This is helpful!
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