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BMW 3-Series (E90 E92) Forum
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SIB Number for Priming Oil System
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02-19-2019, 11:48 AM | #23 | |
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02-19-2019, 11:50 AM | #24 |
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Yes they do fail. So what i am saying is since i am already dealing with "small" fails. Id rather at least not worry about engine damage. Which i am yet to see a n54 lock up after routine maintenance.
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02-19-2019, 11:54 AM | #25 | |
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02-19-2019, 11:56 AM | #26 |
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I didn't spend a lot of time on the F series forum. Is it the same deal with their N55s or only E series?
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02-19-2019, 11:59 AM | #27 |
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Is not only n55. Re-read my post on the other thread. At the shop we had about an equal amount of failed n54 vs n55s. Yes, I know, that isn't the best comparison either because n55s are newer, n54s are modded more aggressively blah blah...If you ask me both fail at equal rate from what I have seen excluding forum threads.
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02-19-2019, 12:00 PM | #28 | |
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My answer is no. We are the only lucky ones that see more of this. But of course some will disagree. Usually people that have these motors will disagree. |
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02-19-2019, 12:02 PM | #29 | |
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Ud think we would see one case... |
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02-19-2019, 12:20 PM | #30 |
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Case of n54 failing after OFHG replacement? I had one last year. N54 without oil cooler came in. Installation required different OFH. Engine failed after about 200 miles afterwards. Has roughly 115k at the time. Oil cooler was primed. OFH wasn't. I have done many many oil changes and OFHG/OTHG replacements and engines haven't failed. I personally don't see correlation there. I alsi had n54 in 535xi and 335i that broke oil cooler line and most oil sprayed out and those engines are still running today, roughly 150k each, at least year has past since repairs.
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02-19-2019, 12:31 PM | #31 | |
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Do you wanna buy my car ! hahahah |
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02-19-2019, 12:31 PM | #32 | |
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02-19-2019, 12:39 PM | #34 |
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Poor guy hahaha everyone going in all sorts of directions. Did you buy anything yet?
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2015 E84 X1 35i M-Sport Last edited by TheGoodTheBadTheUgly; 02-19-2019 at 12:44 PM.. |
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02-19-2019, 01:06 PM | #35 | |
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02-19-2019, 01:13 PM | #36 | |
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I did OFHG by myself and wasn't even aware that could happen. I feel damn lucky now. The only thing I can think about right now might be the oil pump is stuck in a suction loop with air in it. Anyone knows what type of pump it is?
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TOTALED | 2011 E90 335i xDrive - BMS Cold Air Intake - ETS Charge Pipe - ETS 7" FMIC - MHD Stage 2+ - GFB DV+ - PE Mod - VRSF Catless Downpipe - xDelete - xHP Stage 3
2015 E84 X1 35i M-Sport Last edited by TheGoodTheBadTheUgly; 02-19-2019 at 01:23 PM.. |
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02-19-2019, 01:18 PM | #37 | |
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Oh then there is this 7 pages of carnage: https://bmw.spool "remove me" street.com/threads/raise-your-hand-if-youve-blown-up-an-n54.2157/ |
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02-19-2019, 01:28 PM | #39 |
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I think that "priming" procedure is BS for the OFHG. I'm sure it's beneficial if you replace rod bearings or something, but the engine will "prime" oil pressure much quicker while idling then attempting to crank it for 30 seconds.
As for the N54, it has many more ancillary component failures (injectors, turbos, etc...) but the engines themselves never fail unless it's caused by one of those components. For example, an old injector leaking fuel into the oil causing it to dilute thus spinning a bearing. This OFHG engine failure topic has never come up on the n54 forums. My .02 is to buy an oil pressure gauge and use it right after the repair. With the stock pressure switch only tripping whilst under 7PSI, it's useless.
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02-19-2019, 01:31 PM | #40 | |
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Next time i do this, if i do, i will be crank priming for a bit then draining as well. then crank again. Taking ZERO chances. |
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02-19-2019, 01:32 PM | #41 |
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^^i did not realize the stock pressure switch doesn't show a problem until that low of pressure. That's insane. I really wish I would have logged right after doing my ofhg to see what kind of oil pressure numbers it was reading.
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02-19-2019, 02:10 PM | #42 |
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02-19-2019, 02:19 PM | #43 | |||
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Next time you do an OFHG job just load up MHD and see what your oil pressure is lol. See what it is as soon as the car turns over. Log it even. Every morning my oil pressure shows 14.x psi. Seems like pressure is maintained somehow. When I rebuilt my engine it showed 0psi until I cranked on it. Or, maybe that 14.x psi is just reading absolute pressure? I am not sure on that. Last edited by bbnks2; 02-20-2019 at 07:13 AM.. |
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