M90 flywheel position issue?
Moderators: GRNSHRK, ron, bfons
M90 flywheel position issue?
Yesterday I removed the flywheel from my M90 and didn't think of noting which position it was in. I assumed there were alignment pins but now when I look at my pictures, I see none. I understand that the position has to be right for the timing marks. I assume the bolt holes are symmetric. Any hints on how to verify correct position?
- 86_6series
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Re: M90 flywheel position issue?
Look @ the 11:30 hole position in the flywheel. That is where the dowel gets inserted to clock it.
This is from an 85 but the system is the same, look @ # 7.
https://www.realoem.com/bmw/enUS/showpa ... Id=11_0313
This is from an 85 but the system is the same, look @ # 7.
https://www.realoem.com/bmw/enUS/showpa ... Id=11_0313
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Re: M90 flywheel position issue?
11:30 hole position in my picture above? Not sure which hole and what it locks against?86_6series wrote: ↑Fri Aug 12, 2022 10:44 am Look @ the 11:30 hole position in the flywheel. That is where the dowel gets inserted to clock it.
This is from an 85 but the system is the same, look @ # 7.
https://www.realoem.com/bmw/enUS/showpa ... Id=11_0313
- hornhospital
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Re: M90 flywheel position issue?
There's a thin steel bushing on the rear of the crankshaft (or should be) that fits in that hole at 11:30 in your picture. Its a hollow tube,, not a dowel. The flywheel bolt for that hole fits through the bushing. That's what times the flywheel to the crank so that the crank position sensor is correctly registered.
Ken Kanne
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- Ralph in Socal
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Re: M90 flywheel position issue?
+1. Ken is on point. #7 in the realoem diagram may be missing.hornhospital wrote: ↑Fri Aug 12, 2022 8:44 pm There's a thin steel bushing on the rear of the crankshaft (or should be) that fits in that hole at 11:30 in your picture. Its a hollow tube,, not a dowel. The flywheel bolt for that hole fits through the bushing. That's what times the flywheel to the crank so that the crank position sensor is correctly registered.
Ralph
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84 528i Euro
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81 528i Kastanien 5-speed
88 528e Bronzit (Granpa Car)
86 535i Auto (For Sale)
81 633 csi (retired)
Re: M90 flywheel position issue?
Thank you! Now I see the hollow tube and the corresponding hole in the crankshaft mounting plate.