1978 e12 trunk sunroof motor installation

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1978 e12 trunk sunroof motor installation

Post by Dspoljaric » Sat Feb 29, 2020 12:03 am

Hello all - does anyone have instructions on how to install the sunroof motor drive in the trunk of an e12? Today, I attempted to swap my tired motor for my new motor assembly. All going well until I got to the part where I could not figure out how to get the cable guide flange - that is seated in the designated slot of the gear housing - out of its position. You will note, in the pics below, that the large gear the drive the worm drive cable back and forth is secured by a large nut facing the inside of the trunk. I was not able to get this nut undone. How did the BMW techs manage a motor assemble swap? Thank you

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Re: 1978 e12 trunk sunroof motor installation

Post by Lock » Sat Feb 29, 2020 12:40 am

I can't see you pictures, but I can say when I did mine a few years ago, I just swapped the motor itself in, not the whole assembly.

As I recall the motor is bolted in and connects with a keyed rubber/plastic drive connector, so once you unbolt it it will separate and you can install the new motor and plug it into the sunroof relay.
1979 528i 5-speed conversion G260/6, Motronic 1.3 179
1980 Honda CX-500

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