Re: Crack of doom?

[Hans Duinhoven <h.duinhoven@planet.nl>]

I also think this derives from bad fitting door rubbers and all the door 
slamming...
That causes loads of stress to the sheet metal.

Cheers,

Hans

71 BGT with still original pristine doors


----- Original Message ----- 
From: "Paul Hunt" <paul.hunt1@blueyonder.co.uk>
To: "Howard Battan" <battanhr@comcast.net>; <mgs@autox.team.net>
Cc: <Allan.Thompson@ntlworld.com>
Sent: Saturday, December 02, 2006 4:03 PM
Subject: Re: Crack of doom?


> There was a BMC (Canada) service bulletin dated *1963* (Rich Chrysler 
> posted me a copy) detailing a mod to cure it. Must have been really severe 
> to have it happen so early.  It was a great improvement, but still 
> happened although after a much longer period.  My 73 had it when I 
> restored it, and I studied it quite carefully as I didn't want a 
> reoccurrence.  I reckoned there was still a weak point and welded in a 
> flange.  Some years later I saw a Heritage body with exactly that mod, 
> although as part of the original panels.  Whether this occurred before 
> production of the MGB ended, or only with the Heritage shells, I don't 
> know.  There are a number of aspects to be considered when trying to 
> prevent it happening again, but I believe the most important is to ensure 
> there is some clearance between the screen uprights and the side of the 
> 1/4-light frame to allow for some 'scuttle shake'. Without that clearance 
> all the scuttle shake (the MGB is pretty good in this respect but there is 
> some over some surfaces) is transferred into the door skin at the window 
> opening.
>
> More details at http://www.mgb-stuff.org.uk/wn bodyframe.htm
>
> PaulH.
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