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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > All-Wheel-Drive (Xi / xDrive) Talk > Things to do while the sub frame is dropped.



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      07-18-2016, 08:20 PM   #1
Mykindaguise
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Things to do while the sub frame is dropped.

Looking for some maintenance ideas here.

Dropping the sub frame this weekend to do down pipes and motor mounts. I am at 82k miles. Is there ANYTHING else worth doing while I have things apart? Even if its something that doesnt need done until after 100k miles Id rather do it early.
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      07-18-2016, 08:26 PM   #2
Supra2k6
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Oil pan gasketfor sure , dps, and i think crank pulley sensors tend to go bad
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      07-18-2016, 08:45 PM   #3
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Water pump plus thermostat if not done already. It is much easier with the subframe down.
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      07-18-2016, 08:57 PM   #4
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Quote:
Originally Posted by Supra2k6 View Post
Oil pan gasket for sure , dps, and i think crank pulley sensors tend to go bad
Nice! I will add OP gasket to the list. Thank you.


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Originally Posted by PhaseP View Post
Water pump plus thermostat if not done already. It is much easier with the subframe down.
Already done...twice.lol First time I replaced the water pump the plastic side cracked within 500 miles. I am sure you all can appreciate my disappointment with that.
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      07-18-2016, 09:57 PM   #5
blown07
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[quote=Mykindaguise;20277030]Nice! I will add OP gasket to the list. Thank you.

I think you need to look at what needs to be done for the OP gasket....gotta remove the axles, diff, drive shaft....
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      07-19-2016, 08:35 AM   #6
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[quote=blown07;20277304]
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Originally Posted by Mykindaguise View Post
Nice! I will add OP gasket to the list. Thank you.

I think you need to look at what needs to be done for the OP gasket....gotta remove the axles, diff, drive shaft....
LOL I certainly did not realize all of that was needed. But I have all weekend. Ive already had to swap axles before on this car and that wasn't awful. Ill need to figure out how badly I want to commit to that endeavor.
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      07-20-2016, 09:37 AM   #7
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Motor mounts
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      07-23-2016, 03:43 PM   #8
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Hey all. Wasnt going to do my oil pan gasket but I looked and its leaking like crazy sooooo i last minute went and bought all the parts this morning. 3 hours in...subframe, front diff, drive shaft, axles, DPs are out, mounts are installed on the subframe. Doing the oil pan now. Will attempt to do a reverse order DIY for the XI guys out there. Doesnt seem all that bad to be honest.
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      07-24-2016, 02:12 PM   #9
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Quote:
Originally Posted by Mykindaguise View Post
Hey all. Wasnt going to do my oil pan gasket but I looked and its leaking like crazy sooooo i last minute went and bought all the parts this morning. 3 hours in...subframe, front diff, drive shaft, axles, DPs are out, mounts are installed on the subframe. Doing the oil pan now. Will attempt to do a reverse order DIY for the XI guys out there. Doesnt seem all that bad to be honest.
DIY guide would excellent! My XI needs an oil pan gasket as well.
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      07-25-2016, 09:22 AM   #10
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Quote:
Originally Posted by madbim View Post
DIY guide would excellent! My XI needs an oil pan gasket as well.
Unfortunately I didnt take any pictures. This took a while and I became tired and wanted to hustle through as this is my DD.

I am working on a list of how things came out of the car in order and a list of tools needed.

For DPs, motor mounts, and oil pan gasket it took 16 hours start to finish. Was the first time doing any of those on an n54 so took things slowly when taking the car apart.
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      07-27-2016, 12:01 AM   #11
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any DIY, pics or not, would be helpful. ill likely need to do the OP gasket soon too
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      07-27-2016, 08:12 AM   #12
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Yeah sorry guys. Been super behind with doing everything else I should've been doing last weekend during the 18hours i spent on my car.lol Ill have the list up by the weekend. All the parts ran me $155 from the dealer too. It isnt just an oil pan gasket...you need subframe bolts and axles seals and other random BS.

Also my xfer case actuator just died at 83k miles so Ill be fixing that now too. I felt it lightly slipping before but it started making the clicking/grinding noises they do(sounds like a starter not disengaging fully and grinding) and within 2-3 days of that it died.
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      07-27-2016, 08:44 AM   #13
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      07-28-2016, 10:42 AM   #14
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Xfer case actuator is getting here tomorrow. Is there any downside(mechanically) to leaving the actuator unplugged? Im really loving rwd right now...the car gets sideways so easily. If there arent any mechanical downsides Im wondering about creating a killswitch to just kill the sensor on the fly, similar to unplugging it.
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