[DeTomaso] Protecting the inside of frame rails and area behind doors, and material for firewall

[jderyke at aol.com]

Filling with foam is not a good idea. Its been tried inside rear frame rails decades ago. Plastics always post-cure and slightly shrink. Then the NEXT batch of water wormholes past & under the foam and sits there forever rusting since it cannot evaporate. Panteras have had the bottoms of foam-filled rails cut away, dug out and new pieces welded on to replace terminal rust there. Periodic inspections and blowing out with a long-nozzle air line dropped down behind the tank might be your best bet. While the tank cannot be removed with the engine installed, it CAN be shifted around a little, possibly making things easier. Empty is easier to shift than with 160 lbs of gas inside.
TIP: if the screws holding the striker plate cannot easily be removed, there IS rust in the area. Good luck- J Deryke
 


I note there is a lovely little cavity/troughbetween /behind the sheet metal that holds the door striker and the outerfender.  A classic place to accumulate dirt and rust.  I figure it should befilled so dirt and water can’t accumulate.  My assumption is I should buildup a good layer of plastic undercoating to eliminate a catchment basin.  Or,use hard foam to build a sloped cover and then coat with undercoating?
 

 

 

 

-----Original Message-----
From: Stephen Nelson <steve at snclocks.com>
To: detomaso <detomaso at POCA.com>
Sent: Fri, Feb 7, 2014 7:33 am
Subject: [DeTomaso] Protecting the inside of frame rails and area behind doors, and material for firewall



I know all these topics have been broughtup before, so perhaps it will be easy to tell a newbie like me the bestproducts for several areas.
 
What should I use to protect the inside ofthe frame rails and how is it applied?
 
I note there is a lovely little cavity/troughbetween /behind the sheet metal that holds the door striker and the outerfender.  A classic place to accumulate dirt and rust.  I figure it should befilled so dirt and water can’t accumulate.  My assumption is I should buildup a good layer of plastic undercoating to eliminate a catchment basin.  Or,use hard foam to build a sloped cover and then coat with undercoating?
 

 
And, lastly, what is best to replace thesound proving on the engine-side of the firewall?
 
OK, one more.  I noted on disassembly thatthe removable panels in front of the rear tires did not extend all the way tothe inner fenders – leaving a gap as wide as ¾ of an inch between therubber and the fender.  Is this common?  I figure to make an extension out ofsheet metal that will allow the rubber seal to seat against the inner fender.
 
As always, I really appreciate all you guy’sand gal’s comments.
 

Stephen Nelson
 
SNClocks.com
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