08-13-2022, 06:45 AM | #25 | |
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Xdrive oil sump is poorly designed due to the front driveshaft and maybe the oil was a little bit low. Shame to hear. |
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08-13-2022, 08:49 AM | #26 | ||
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Woah, sorry i havent posted in a while, been busy with the car.
Lots of replies, i really appreciate everyones inputs Quote:
In fact it was such a pain to find an M235i motor, that one of the local shops that services bimmers under warranty. Suggested I have my crankshaft machined and drop in with new bearings, as it would be easier than having to find a new motor. Another shop also suggested sourcing an N55 from a 335i and "just stage one it bro" (real response from a shop, i was shocked ) I respectfully denied both offers/solutions. The motor i found with 15k miles on the clock ended up costing me 7.8k + shipping and i have to return my old core. I just got the motor this week so its not in the car yet. im waiting on the VAC motorsport bearings to arrive. Quote:
So, it turns out that the N55 has a poor oil pan and oil pump design in the first place. this is why in the S55 of the m2, the oil pan was redesigned ( and can be retrofitted on non Xdrive N55s) and the S55 also uses a dual oil pump system. BMW knows that the N55 suffers from oil starvations issues, and after speaking to an independent beemer tech who flew out to germany for some training of these motors, I have solid reason to believe that BMW didnt bother with upgrading the bearings because most of the time, if the bearings do fail due to: improper maintenance intervals, track abuse, neglect. They almost always fail outside of the manufacturer warranty. IF i didnt have Xdrive, i would definetly forgo the VAC motorsport bearings and just get the S55 oil pan and oil pump retrofitted as it increases flow by "18%" which illiminates the oil starvation issue for all application; track/daily use and maybe even said 30 second donuts Im not sure if the Xdrive oilpan is worse than the non Xdrive n55 oil pan. However I do know that we cannot swap the S55 oil pan due to said front drive shaft. Iv been trying to find out if we can swap the S55's dual oil pump and keep our stock oil pan. No luck tho on my research, no one has attempted it to my knowledge. |
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08-13-2022, 10:31 AM | #27 |
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It should actually help, as it acts like a natural baffle, I track my xDrive every summer with no issues for the past 5 years, but you do have to check your oil level after every session and every now and then as you do burn oil. If the oil is low enough, oil will not be picked up.
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08-13-2022, 10:43 AM | #28 | |
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No you cannot just add the second pump because it's not going to give any benefit. The second pump just gets the oil from the front of the the oil sump and sends it the rear enclosed area through the little sifon. I don't even think that upgraded rods would solve any issue due to lack of oil. I don't remember but there is a product on the market that acts as a small oil sump in case of oil starvation but i cannot recall the name. Also check out on youtube this lesson from HP garage maybe you can find some ideas for a custom solution for the Xdrive model Budget Oiling Solution | Creating the Ultimate Wet Sump [GOLD WEBINAR LESSON] Sorry for the bad pictures but they were just for personal use: Left stock n55 sump, right S55 sump Dual oil pump |
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08-31-2022, 05:03 PM | #29 |
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So, car is finally off the lift and on the road with the VAC motorsport bearings and the APR head studs. Drives like a dream.
Im still disappointed about the fact that our N55s suffer from the oil starvation problem and theres *seemed* to be no solution for those of us with Xdrive. Well guess what! I believe to have found interesting for some of you. MMR manufactures a baffle system for N55s which IS compatible with Xdrive. It greatly improves on the oil starvation issue, while not as efficient as an S55 pan and pump. this is a great option for those of us who cant go down that route. Also cost wise its a much for accessible option. I will be linking the baffle here along with another thread of people discussing the effectiveness of the baffle. Link to the baffle https://www.turnermotorsport.com/p-4...ed-sump-plate/ Link to the other forum thread about said baffle https://f30.bimmerpost.com/forums/sh....php?t=1833312 Im just annoyed that i discovered this AFTER my car came off the lift and the new engine is dropped in LOL |
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09-09-2022, 02:19 PM | #31 |
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Overfilling by that much may make the oil frothy, thus potentially causing a lubrication issue.
These cars can handle track duty so as long as the oil level is correct and you're not on a track with a sustained high G turns. If you're running track tires, then the car could generate very high Gs, possibly sloshing the oil too far to one side of the pan for an extended time. You'd be best served to either: 1) Do the M2/3/4 S55 oil pump/baffle 2) Buy an M2 I don't see the point in doing the MMR baffle system over the S55 oil pump/baffle unless you have xdrive.
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09-09-2022, 03:18 PM | #32 |
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^ This ^
Only reason someone would do the MMR baffle over the S55 parts if they had a RWD model is because its cost prohibitive. But if you cant afford the S55 parts you definetly have no business being at the track because a new motor will set you back 10k lol |
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03-24-2024, 01:18 PM | #33 | |
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03-24-2024, 03:30 PM | #34 | |
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