Re: Crack of doom?

["Paul Hunt" <paul.hunt1@blueyonder.co.uk>]

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.

----- Original Message ----- 
> Is the 'Crack of Doom' common to all MGBs? Is my '79 susceptible, or was 
> it
> eventually cured by manufacturing changes?
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