help! door jamming...

["dmcjohn" <john.dore@xxxx>]

Hi guys,
My passenger door is giving a bit of trouble, I hope someone can help 
me! It closes fine but often closes with a loud clunk, as if it is 
not hitting the striker pins dead on. Anyway, it will easily open 
again whenever needed. The problem arises when it is locked, either 
manually from the inside, or with the key from the outside. Once it 
is locked, it can be immediately unlocked again in the same manner, 
no problem. The trouble is when the car is left locked on a hill (my 
driveway is uphill) for a period of time, or after driving around a 
few bends, and you try to unlock it again, it will be stuck! 
Sometimes taking another fast bend either to the left or the right 
will free it up again, other times the passenger has to bang on the 
top of the inside of the windowsill, and it will free back up again 
after a minute.
It seems to me that the door is not closing correctly on both 
latches, and then when any force is put on it while locked (eg being 
left on a hill or going around a bend) it moves slightly, and it gets 
jammed. 

In case it matters, my car is a september 1981, with the old style 
locks. It has Lockzilla and lockzilla remote, but I have disconnected 
these until I can get the locks to work manually first. 

The roofline of my door (when closed) seems to be a bit high at the 
windscreen edge (there is a small gap visible), and a bit low at the 
other end, by the t-panel. 

I will be opening the door up some night this week to install my 
upgraded window motor, is there anything I should look for when I 
have the guts of the door open then?

Any advice is very much appreciated!
Thanks,
John Dore, Boston, MA.
#3810