Hints and Tips - Adhesives in Frames

To: british-cars-pre-war
Subject: adhesives or not?
From: Jack Hardy
Date: Sun, 28 Mar 1999

Hi All,

I'm about to start reassembling the wood frame of the MG PA, it seems useful to glue and screw to together. There was no sign of adhesive when I took it apart. What do you all think?

What type of adhesive? I was thinking of using a marine adhesive from 3M, FC5300, it is waterproof and stays flexible. It is used in wooden boat building. Any suggestions?

Thanks

Jack


From: Jim Runciman
To: Jack Hardy
Subject: RE: adhesives or not?
Date: Mon, 29 Mar 1999

We used a silicone flexible product and modern timber screws on a body frame that is now 20 years old. Our reasoning being that the chassis isn't rigid so the frame is going to move. With modern high strength adhesives the joint will tend to break if the timber cannot flex enough to accomodate chassis flexing. The screws hold the assembly in position. This might not suit some but it has worked superbly for us.

Jim Runciman


From: Gary Thompson
To: british-cars-pre-war, Jack Hardy
Date: Tue, 30 Mar 1999
Subject: Re: adhesives or not?

Woodwork was not originally glued because of chassis flex however the way the MG is constructed you could safely glue all the joints in the scuttle area and also at the rear of the car. I would not glue the joints at the bottom of the door between the door pillars as this is where all flex takes place. The above does not necessarily apply to other makes or models,

Gary


From: John Hardy
To: Jack Hardy
Subject: Re: adhesives or not?
Date: Mon, 29 Mar 1999

There are 2 schools of thought here. Originally, joints were not glued. The coachbuilder I use tends to glue them with a normal PVA wood glue. I tend to think that if the joints are glued (mine lasted 60 years without !!!) it would make accident damage repair more difficult.

In the fervent hope that your mechanical contrivances remain trouble free

JH


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