Originally Posted by
MoparFreak69
What's happened is someone has tried to remove it by just pulling on it like a lot of cars are made to do. Ours are pinned into the door shell accessible only by removing the window frame. Only proper solution is to buy an intact trim strip, disassemble the door almost completely and clip it in properly.
Not the case. The trim eventually pops up like it does without any reason other than failure of the adhesive. My trim is doing the same thing. The force that curves the trim, is caused by aging and weathering of the trim, resulting in shrinkage of the trim in a way that causes upward curving to occur, pulling the end of the trim up from the door edge.
The surfaces of the trim piece exposed to the elements and UV from the sun, shrinks the exposed upper surfaces compared to the normal dimension of the inner surfaces of the unexposed underside of the trim piece, causing the bending force that lifts the trim upward at the end.
The constant application of the bending force eventually causes the adhesive to fail, allowing the trim to lift from the door edge at the end. The adhesive is not intended to resist constant loading, it is only capable of holding the trim in place without a constant loading force applied, this is why the adhesive eventually fails allowing the trim to lift upward. When the trim starts lifting up, the metal spine of the trim gets bent and adds to the continuing upward lift of the trim.
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