456M window seal gap issue NB not the same as the 456GT

I have been putting up with wind noise in my 456 and have been contacted buy another Fchat member about this issue.
My car has been in a hot climate as evidenced by the shrinkage of the leather on the dash.

First off lets qualify the situation so there is no confusion with the GT problem which allows the window glass to sit out at the top, the M doesn't appear to have that issue because of the different material used in the pivot pin.

Where the issue with mine was a .1mm gap along the back edge of the glass to the rubber pintchweld seal. Beside of this I have been reluctant to wave a hose over that part of the car for fear it water gets in.

I removed the inner trim which is held in at the top with a plastic fir-tree type press in retainer. these take a bit of persuasion but will let go

The Seal sits on only a simple profile section of bodywork and is not double spot welded to another panel section. But is pop riveted to a panel along the back edge, youll see this when the seal and the trim are removed

Remove the pinch weld away enough to expose the section with that the seal sits on .
Taking a thick curved piece of timber slightly more curved than the and a decent hammer its only a matter of carefully Hold the timber on the edge of the retainer and from the inside out along the edge from the top to the bottom repositioning the retainer out in a neat curve, 1mm at at time refit the seal and check is is contacting all the way along. I had to do this a few times a small about at a time to get it right.
An old school panel beater knows how this done the new guys have no idea
The red lines on the drawing of the parts book refer to the seal retaining strip section
Image Unavailable, Please Login

 

This is exactly my issue I was having and the seal was probably OK when new but 17 years later in my 2000 model the gap was noticeable.

I just did 350Ks round trip in my car to AutoItalia Canberra in my car and I my wife's words, its just like a normal car its rather quite, except for the subtle Tubi exhaust sound

The M has a different part numbers to start with and then the early GT has parts book shows there is a replacement part number:- "63209400 R.H. GLASS LIFT DEVICE - - Not as spare part now - Replaced by 63580200"

 

May be the same issue applies to the 575. The door glass contour may be more than the frame shape.
On the 456M it was 1mm and was visible.
Having visited a Auto glass manufacturer and received an very in depth tour.
It is a trial and error procedure to get the shape correct and any minor variation in time in the oven and temp of the oven effects the shape even when its in a support frame. With the "small" number of items made its possible for variations to happen.

 

Good Though however 456M seals are available to order @ $2200 US, or $3000 AUD.
I am happy with my rework.