N52 Oil priming procedure

bimmergoat88 · 04-07-2025, 08:13 AM

Hey everyone
Just wanted to see how I should prime my oil system after doing the OFHG, how do I unplug the injectors or can I just unplug the fuse. This is on a 2011 BMW 328i

TheHazelNut · 04-07-2025, 08:34 AM

Quote:

Originally Posted by bimmergoat88

Hey everyone
Just wanted to see how I should prime my oil system after doing the OFHG, how do I unplug the injectors or can I just unplug the fuse. This is on a 2011 BMW 328i

just drive the car, If you need to do something just for piece of mind you can follow this guide for the N55, should apply for the N52 as well

https://www.fcpeuro.com/blog/bmw-si-...system-priming

bimmergoat88 · 04-07-2025, 10:17 AM

Ya I think it’s a bit different on the n55 because of the injectors, on my car it’s a fuel rail and I’m just wondering where I can unplug them

The Nightman · 04-07-2025, 10:47 AM

The idea is the same where you would still remove the fuel pump fuse. Should be a 20A fuse in position 70 but verify.

fastboatster · 04-07-2025, 07:47 PM

don't worry about this if you have an n51/n52. I did my ofhg at about 100kmiles, and now I'm at 135kmiles. n55 probably needs this, I haven't felt adventurous enough to see what happens if you don't prime the oil circuit.

Efthreeoh · 04-09-2025, 08:37 AM

I've replaced the OFHG on my E90 N52 twice and I've done 34 oil changes on it. Oil changes, using a pneumatic oil excavation canister, I suck out every drop of oil in the OFH. And I let the oil pan drip until it stops, the I suck out any residual oil in the pan.

I've never primed the engine with oil. Enough oil stays in the oil pump/pickup tube to prevent any oil starvation issues.

04-07-2025, 08:13 AM	#1
bimmergoat88 Registered 0 Rep 5 Posts Drives: 2009 BMW 335i Join Date: Feb 2024 Location: Toronto iTrader: (0)	N52 Oil priming procedure Hey everyone Just wanted to see how I should prime my oil system after doing the OFHG, how do I unplug the injectors or can I just unplug the fuse. This is on a 2011 BMW 328i Last edited by bimmergoat88; 04-07-2025 at 08:16 AM..
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04-07-2025, 10:17 AM	#3
bimmergoat88 Registered 0 Rep 5 Posts Drives: 2009 BMW 335i Join Date: Feb 2024 Location: Toronto iTrader: (0)	Ya I think it’s a bit different on the n55 because of the injectors, on my car it’s a fuel rail and I’m just wondering where I can unplug them Last edited by bimmergoat88; 04-07-2025 at 10:17 AM..
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04-07-2025, 10:47 AM	#4
The Nightman Cometh 1442 Rep 1,485 Posts Drives: Boy's Soul Join Date: Jul 2016 Location: Boy's Hole iTrader: (4) Garage List E90 LCI 330i [10.00]	The idea is the same where you would still remove the fuel pump fuse. Should be a 20A fuse in position 70 but verify.
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04-07-2025, 07:47 PM	#5
fastboatster Major 455 Rep 1,001 Posts Drives: 2009 bmw 328i Join Date: May 2019 Location: CA iTrader: (0)	don't worry about this if you have an n51/n52. I did my ofhg at about 100kmiles, and now I'm at 135kmiles. n55 probably needs this, I haven't felt adventurous enough to see what happens if you don't prime the oil circuit. __________________ 09 328i TiAg 6MT barebones with sport package
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04-09-2025, 08:37 AM	#6
Efthreeoh General 20416 Rep 20,322 Posts Drives: The E90 + Z4 Coupe & Z3 R'ster Join Date: May 2012 Location: Summum Choragium iTrader: (0)	I've replaced the OFHG on my E90 N52 twice and I've done 34 oil changes on it. Oil changes, using a pneumatic oil excavation canister, I suck out every drop of oil in the OFH. And I let the oil pan drip until it stops, the I suck out any residual oil in the pan. I've never primed the engine with oil. Enough oil stays in the oil pump/pickup tube to prevent any oil starvation issues.
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