06-29-2023, 08:54 PM | #1 |
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prime the oil system
After receiving a couple emails from FCP Euro about priming the oil system, I went searching for more info here on BIMMERPOST. I found some references here and there in tangential threads, but no thread specifically on the topic of priming the oil system in our engines. From what I can tell, this applies to the OG and LCI M2's with the N55 engine. I haven't seen specific references about whether this also applies to the M2 Comp/CS with the S55 engine.
I'm learning that this is a critical procedure for any sort of service/maintenance that interrupts the oiling circuit — which might introduce air pockets into the system. The air pockets can lead to starvation of oil on various bearings and, thus, bearing failure. The service activities that necessitate priming the oil system include removal of the oil filter housing, removing the oil pan, work on the VANOS sprockets/gears, and more. This procedure doesn't seem to be recommended for a plain ol' oil & filter change. The first message I received from FCP Euro linked to a blog post about the procedure: https://blog.fcpeuro.com/bmw-si-b11-...system-priming The second message I received from FCP Euro linked to a YouTube video about the procedure: They both refer back to a 2016 TSB from BMW about priming the oil system: https://static.nhtsa.gov/odi/tsbs/20...51166-9999.pdf I note a significant difference between the BMW TSB and the FCP Euro text and video guides above. The BMW TSB indicates to pull the fuse for the low-pressure fuel pump before running the priming procedure. FCP Euro advises the additional step of pulling the spark plugs before running the procedure. For completeness, here are the BIMMERPOST posts that I could find that reference this procedure: |
06-29-2023, 10:40 PM | #2 |
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Yes pull the plugs so no compression builds. This allows the engine to crank easier meaning more rpm and thus more oil flow.
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06-29-2023, 11:13 PM | #3 |
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I actually have a significantly better priming method than this - it should be immensely better. But I don't have the parts to make one for everyone to use, so I talked to Malo industries to see if he can make some bespoke parts for this job and we will see what happens.
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06-29-2023, 11:51 PM | #4 |
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For whenever you’re ready to share details: you have my attention!
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06-29-2023, 11:56 PM | #5 | |
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If malo industries doesn't get on board then the idea is likely dead for mass use because the amount of things one needs to assemble to get the job done is likely too much.
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06-30-2023, 04:35 PM | #7 |
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That’s why I do, I’ve done many OFHG jobs no issues. Also pour oil in oil filter housing at least 1 bottle.
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06-30-2023, 04:42 PM | #8 |
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That's a waste of oil. Because the oil will just drain right down into the sump via the return hole (the small center hole), only fill the outer holes until those don't fill any more then stop, any extra will just drain back to the sump.
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06-30-2023, 07:44 PM | #9 | |
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06-30-2023, 08:01 PM | #10 |
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I'm not the one selling it lol. That's up to malo industries, I just gave them my idea.
If they don't make one I'll figure out how to diy one and I'll just take photos for you guys of the final assembly.
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07-10-2023, 10:19 AM | #11 |
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I change the oil when I do this job, I don’t drain oil through ofhg just add oil. I also do this when changing the oil as well.
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07-16-2023, 04:18 AM | #12 |
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This link helped me find the right fuse and the process was just as expected/described in the FCPEuro video (I didn't remove my spark plugs - seems unnecessary): https://f87.bimmerpost.com/forums/sh....php?t=1634660
Here is a couple photos. The fuse with the red plastic removal tool is the one I pulled. |
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07-16-2023, 04:24 AM | #13 | |
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07-16-2023, 01:55 PM | #15 |
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No, only when you disrupt the oil supply. so when replacing the oil cooler.
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07-17-2023, 04:38 AM | #16 | |
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07-17-2023, 04:47 AM | #17 | |
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07-17-2023, 08:04 AM | #18 | |
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07-17-2023, 05:28 PM | #19 | |
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The oil pressure reading comes from the oil pressure sensor on the OFH.
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07-18-2023, 08:50 PM | #20 |
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When pulling the spark plugs, are you leaving everything open or do you place the ignition coils back in too?
And how many times are we supposed to crank it? I'm about to do oil cooler, OFHG, and HPFP so I wanna be prepared lol
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07-18-2023, 11:06 PM | #21 | |
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Here's the guide: https://static.nhtsa.gov/odi/tsbs/20...25106-9999.pdf
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07-19-2023, 12:23 PM | #22 | |
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