Non-BMW Stuff on a BMW Forum
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Had an opportunity to get a lower mileage m20b25 for a good deal and they delivered it. Plans are to disassemble it and then rebuild it over the summer and maybe put it in next winter. I figured with the age of these cars having a spare drivetrain is a good idea.
Also working on cleaning up the spare g260.
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Other than a little bit of trimming, the trunk is all done. In hindsight I wish I would have used a single panel for the entire floor and then glued carpet to that, but, I'll save that for a later time.
And the transmission is all cleaned up. Removed the tail and input flanges to replace the seals. Surprisingly the tailshaft flange nut came right off and the flange slid off. I didn't need to use a puller at all.
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When you reinstall the output flange make sure to follow the torque procedure, it's a tighten, loosen, then tighten thing. It seats the bearing but then the final torque is less. That is normal for it to slide right out, it is just a straight spline.
If you over tighten the nut it will eventually wreck the bearing. I know from experience, it will happen at the moment your wife is driving the car with her mom to get their hair done before your sister in laws wedding.
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When you reinstall the output flange make sure to follow the torque procedure, it's a tighten, loosen, then tighten thing. It seats the bearing but then the final torque is less. That is normal for it to slide right out, it is just a straight spline.
Is this procedure laid out in the Bentley manual? I'll have to double check it, it didn't see this procedure called out in any of the write-ups I went through when I did it on my other transmission.
And the output flange did not slide right off on my other transmission, it took a gear puller and some muscle. Most experiences I read on this people had some trouble getting them off. Maybe it's a good sign.
Edit. Pasting this here for my future reference:
someone said:
The output flange is sealed with a high strength stud locker on both the
splines and threads.
The manual recommends: Locktite 270 or Hylogrip or Curil K-2
Locktite 270 has been replaced by 2701 (or #27040)
BMW recommends Loctite 242 for newer transmissions, but that may not be
correct for the Getrag 260.Apply the sealant to the splines on the flange only, not the shaft
splines. Slide the flange on, and apply sealant to the bearing surface
of the collar nut. Tighten in two rounds: tighten to 125 ftlb, loosen
1/4 to 1/2 a turn, then tighten to 90 ftlb. This assures that the
flange is fully seated on the output shaft, not on trapped sealant. -
Is this procedure laid out in the Bentley manual? I'll have to double check it, it didn't see this procedure called out in any of the write-ups I went through when I did it on my other transmission.
And the output flange did not slide right off on my other transmission, it took a gear puller and some muscle. Most experiences I read on this people had some trouble getting them off. Maybe it's a good sign.
Edit. Pasting this here for my future reference:
That is exactly the procedure I was thinking of. I supposed the difficulty removing the flange depends on how much sealant was applied previously.
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So I got the transmission back together and then noticed the output flanges are different between the new transmission and the one that was in the car. I'm assuming I have to swap it to the new transmission?
The shorter one is the new transmission and the taller one was in the car.
Edit: I figured that's what I was going to need to do and pulled both flanges off.
But I also got a lightly used gates timing belt and all new timing parts on tonight.
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despite their style difference, they look awful close dimensionally. check the distance between the mounting face and the trans and the PCD
Dan
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That carpet cleaned up surprisingly well!
What did you use to accomplish that? -
despite their style difference, they look awful close dimensionally. check the distance between the mounting face and the trans and the PCD
I'll measure them just to know one way or the other, but I already pulled them both off and will put the one that came with the car on the new transmission.
That carpet cleaned up surprisingly well!
What did you use to accomplish that?I uhhhhhhhh just bought some new carpet and made my own trunk panel. Haha. If you remember the spare tire panel didn't line up with the car's.
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I uhhhhhhhh just bought some new carpet and made my own trunk panel. Haha. If you remember the spare tire panel didn't line up with the car's.
I clearly didn't read enough
That explains it though!Looks nice!
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Some yellow fogs from Gina.
And the difference in the flanges. Tall one came on my car.
Whats up with the plastic tabs on that fog light?
If the splines and bolt pattern on the flanges are the same, it shouldn't matter which one you use. The driveshaft should have enough adjustment in and out to allow you to use either one. I would consider using the one that best fits the motor at its furthest back position on the motor mounts. (likely the shorter one).
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Whats up with the plastic tabs on that fog light?
If the splines and bolt pattern on the flanges are the same, it shouldn't matter which one you use. The driveshaft should have enough adjustment in and out to allow you to use either one. I would consider using the one that best fits the motor at its furthest back position on the motor mounts. (likely the shorter one).
i have the chinesium fogs too - the quality and moldings are awful.
Dan
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Whats up with the plastic tabs on that fog light?
If the splines and bolt pattern on the flanges are the same, it shouldn't matter which one you use. The driveshaft should have enough adjustment in and out to allow you to use either one. I would consider using the one that best fits the motor at its furthest back position on the motor mounts. (likely the shorter one).
The taller one came with the car. I figured I’d just use that one.
i have the chinesium fogs too - the quality and moldings are awful.
My car didn’t come with any fogs. They’re more or less just to fill the holes.
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