why do windows lower half an inch before door opens?
- Thread starter Ridgeline
- Start date
They push up into the rubber seal when you close it. When you open they have to back out or else they damage it.
Big Earl
bnkwupt
Because on frameless doors, the windows push up into the door seal when the doors are closed. The windows must retract from the seal in order for the door to open without damaging the seal or the glass.
Ah ha. frameless doors may be the reason there is so much traffic noise getting thru.
I'm not sure they put too much thought into designing these doors/windows. For the Model S, for example, the windows do the same, go down a few cm but they don't actually push up into any seal. When the door is closed, the window just pushes very slightly against the seal, doesn't go in/under at all. The door would very easily open if the window didn't go down at all.
On the other hand, maybe the windows go up/down when the doors open/close, so they doesn't get forced either way because of the sudden pressure difference?
On the other hand, maybe the windows go up/down when the doors open/close, so they doesn't get forced either way because of the sudden pressure difference?
Big Earl
bnkwupt
If the window doesn't retract, the glass won't clear the chrome (black on a Y) trim without getting caught. This has presented a challenge for people in the winter when the window freezes and won't roll down. If you manage to get the door open without scratching the trim, you could find it very difficult to close again.
Off-topic, but it's worth mentioning that using a product like Gummi Pflege on the seals can help prevent them from freezing to the glass in the winter.
*Unlike Trevor, I don't advocate using silicone spray for this purpose. I posted his video because his description of the window operation is spot-on.
This is common on car's with cars where the door is frameless around the window. It helps to not push the rubber up yes. But it also helps in closing the door to allow air to escape; which also why sometimes you see it on well "pressurized" cars with framed doors. And yes, avoiding chrome damage. There have been reports of misaligned windows or windows that failed to drop when closing and causing damage. Personally from a aesthetic perspective I prefer frameless; but framed door are more secure and quieter.
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