The grommet/insert thingies need to be inserted into the regulator motor, before installing the motor in the door. Then the screws thread in through the small holes inthe door, and into the inserts, holding the motor tightly against the door. The grommets get squeezed during the screw torquing process.
how does window regular motor attach to door?
This should be easy, but the answer has escaped me. I had a body shop guy install a new Dorman 741-550 window regulator in the driver's side door (1996 Grand Caravan). That went great, but he left the motor unattached to the door. I can't figure it out, either. There are three bolts with rubber grommets. The grommets have small round threaded nuts which insert into their center, but both the grommet and the nut are smaller than the hole in the metal door panel. There is a flange on the grommet that's slightly larger, but if I put that on the back side of the door panel what's to keep the bolt from vibrating against the sides of the door panel hole?
I looked at the passenger side motor but all I can feel behind the panel is a mass of rubber and the threaded piece. Not obvious that it's the same setup.
I looked at the passenger side motor but all I can feel behind the panel is a mass of rubber and the threaded piece. Not obvious that it's the same setup.
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I dispose of those and use a real nut/bolt combo. Doesn't increase the noise level one bit and is much easier.
I usually end up replacing at least one. They are easy to trash. Dealer wanted 6 bucks a piece for them. Got them for $2 at Lowes.
more detail, please
The holes in the door aren't small, thus the problem. They're about the same diameter as the inserts (grommets). Are you saying that when the bolts screw into the inserts that they spread the insert out to a larger diameter? That doesn't seem to be happening. Or do you mean that they pull the motor to the door like a normal nut or washer would? They aren't big enough in diameter to do that. Please explain.
"inserted into the regulator motor" means threaded onto the bolts which extend from the motor?The grommet/insert thingies need to be inserted into the regulator motor, before installing the motor in the door. Then the screws thread in through the small holes inthe door, and into the inserts, holding the motor tightly against the door. The grommets get squeezed during the screw torquing process.
The holes in the door aren't small, thus the problem. They're about the same diameter as the inserts (grommets). Are you saying that when the bolts screw into the inserts that they spread the insert out to a larger diameter? That doesn't seem to be happening. Or do you mean that they pull the motor to the door like a normal nut or washer would? They aren't big enough in diameter to do that. Please explain.
Your understanding is correct - the grommet "barrels" slip into the holes in the door (the screws should already be lightly threaded through the motor and into the barrels), then as you tighten the screws, the barrel sort of collapses from being squeezed and expands, preventing it from coming back out through the hole. I just did this a couple of weeks ago, I wish I had taken some pictures, sorry.They're about the same diameter as the inserts (grommets). Are you saying that when the bolts screw into the inserts that they spread the insert out to a larger diameter? That doesn't seem to be happening.
This was what I was looking for when I needed to replace the window regulator. If I'd known about it I might have tried doing it myself. But no loss, I was lucky enough to get someone who knew what they were doing to do it for $40. Thanks for the link.
I stuck the grommet barrels into the hole and tightened down the bolts...nothing. You can pull the grommets right back out. So I just inserted two of them this way for shock absorption and on the third just used a good old nut and lockwasher on the back side to hold everything in. Seems to work fine.Your understanding is correct - the grommet "barrels" slip into the holes in the door (the screws should already be lightly threaded through the motor and into the barrels), then as you tighten the screws, the barrel sort of collapses from being squeezed and expands, preventing it from coming back out through the hole. I just did this a couple of weeks ago, I wish I had taken some pictures, sorry.
You have to take the nut/grommet OFF of the bolt and insert it into the hole in the door from the INSIDE of the door, with the nut portion staying on the inside of the door. The bolts are a little hard to get started, so you might have to hold the nut from the inside of the door with a pliers. Once you get all 3 started you can pull the motor away from the door enough to tighten up the rubber grommets and tighten the bolts without holding the nuts from the inside. I just did this last weekend. Glad you got it done at a reasonable price. 
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