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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Sun, Jun-16-2019, 11:07:43 PM   #1
bmwbob89
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Default Convertible top motor replacement questions

I have a 98 M3 Convertible that has had an ongoing issue with the storage cover for the top. Intermittently won't open to store the top. When this happens S2 does not switch to close on GT1. I ordered a used main motor. The instruction on new TIS say to remove the storage lid cover. Is this necessary? I have to mess with aligning it. Any other hints on replacing it would be of great help and appreciated. Timing the gearbox and such. Thanks Dale
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Old Mon, Jun-17-2019, 12:32:39 AM   #2
M_Parallel
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Default Re: Convertible top motor replacement questions

Lid cover does not need to come off to replace the cover motor.

Taking it off is just 4 bolts though.
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Old Mon, Jun-17-2019, 01:22:02 PM   #3
bmwbob89
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Default Re: Convertible top motor replacement questions

I know that but I hate to monkey with painted parts if avoidable. I could see no reason it would have to come off. Its bad enough someone else has been there and stripped the center screw.
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Old Mon, Jun-17-2019, 03:32:09 PM   #4
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Default Re: Convertible top motor replacement questions

Yeah no need to remove the lid. I would also check that the motor mounting plate is not bent. I found that my plate was bent and that is what was causing the issue. Could be a good time to replace the lid gas struts as well.
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Old Tue, Jun-18-2019, 06:32:48 PM   #5
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Default Re: Convertible top motor replacement questions

This is the top motor not the cover motor so no bent plate issue. The lid struts were replaced about 2 years ago and were a big help. I had a thought while walking the dog. S1 and S2 switches are greasy and there was actually a drip of grease hanging on the switches. I believe the grease seeped out of the gearbox and maybe its causing S2 to not close. Grease could insulate the contacts in the switch. So for jollies I sprayed a bunch of contact cleaner on the switches and will see if the problem persists. Its an intermittent issue so I won't know for a little while.
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Old Wed, Jun-19-2019, 08:37:48 PM   #6
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Default Re: Convertible top motor replacement questions

Okay here is where I am now. Installed the used motor. Now the top comes out of the storage bin and the lid won't go down. S2 is not tripped. Yikes going to walk the dog and think it over. There must be an adjustment somewhere to fix this. The problem was the door would not open intermittently.
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Old Fri, Jun-21-2019, 01:28:20 AM   #7
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Default Re: Convertible top motor replacement questions

Used motor was worse than the one I had. S2 on mine was intermittent. This one it didn't work at all. Installed my old one and the top works again. Easier the second time. Now I'm back where I started. Debating putting a momentary switch in so when S2 doesn't engage I can just push the button. Has anyone done this?
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Old Mon, Jun-24-2019, 03:33:51 PM   #8
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Default Re: Convertible top motor replacement questions

Sorry, I just saw storage lid and went straight for that motor.

I haven't had issues yet with my S1/S2 switches so not sure about your idea. You would just have to time it right and have the right logic order for the whole sequence. You would need to follow the charts here.

http://www.unofficialbmw.com/e36/ext...ble_adjust.pdf
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Old Mon, Jul-01-2019, 11:58:41 PM   #9
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Default Re: Convertible top motor replacement questions

OK here is where I am and I think its fixed. I installed another used top motor. Now I'm back to no S2. So then I added a momentary switch to the system and viola the top works but its not really a fix. So I said what the hell and had my wife watch the GT1 screen while I turned the forbidden screw. It took 3 full turns counterclockwise and S2 tripped. Opened and closed the top several times and seems to be fixed. I'll get back after a couple of weeks and update the post. Now I have to get a new battery as it failed during all of this even with a trickle charger hooked up. Had to borrow the one out of my M-5.
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Discussing Convertible top motor replacement questions in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)