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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > How to prime oil system after doing OFHG?



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      09-23-2022, 12:12 PM   #1
Chrisguilday
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How to prime oil system after doing OFHG?

Hey guys, I have a 2011 E93 N55.

I forgot to pull the fuel pump fuse before changing my OFHG, so now even if I pull that fuse my car will still start for a while until it finally runs out of gas. So what fuse can I pull to stop the engine from starting? Is there a fuel injector fuse?

Iíve tried looking at the fuse box diagram in the glovebox, there is supposedly a #39 fuse for the fuel injectors according to this other online diagram, but that fuse is already missing for my car, so clearly thatís not the right one.
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      09-23-2022, 12:54 PM   #2
TheMidnightNarwhal
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I do it by disconnecting the fuel injector connectors. I believe that's what the BMW document also states to do even though there are other ways like you mention.
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      09-23-2022, 01:10 PM   #3
Chrisguilday
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Quote:
Originally Posted by TheMidnightNarwhal View Post
I do it by disconnecting the fuel injector connectors. I believe that's what the BMW document also states to do even though there are other ways like you mention.
So you mean the little coil pack connections, right? They just flip up and the connector slides out. If so thatís what I just did. How long should I let the motor turn over?

Also my dumbass broke the crank case vent / vacuum hose that connects to the air intakeÖ the little hose that goes from the air intake to the left side of the engine. This piece https://a.co/d/7BnZnya

So now I have to buy a new one of those. Damn it.
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      09-23-2022, 01:20 PM   #4
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Quote:
Originally Posted by Chrisguilday View Post
So you mean the little coil pack connections, right? They just flip up and the connector slides out. If so that’s what I just did. How long should I let the motor turn over?

Also my dumbass broke the crank case vent / vacuum hose that connects to the air intake… the little hose that goes from the air intake to the left side of the engine. This piece https://a.co/d/7BnZnya

So now I have to buy a new one of those. Damn it.
No like you write, those are coil packs haha. I'm talking about the fuel injector electrical connectors. Not the coil pack.

Last edited by TheMidnightNarwhal; 09-23-2022 at 01:27 PM..
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      09-23-2022, 01:27 PM   #5
Chrisguilday
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Quote:
Originally Posted by TheMidnightNarwhal View Post
No like you write, those are coil packs haha. I'm talking about the fuel injector electrical connectors. Not the coil pack.
OhÖ well that works too right? I mean the engine doesnít start haha. Iím sure that does the same thing, right? As long as the engine turns over. Is the oil pumped mechanically?

I just want to make sure that disconnecting the coil packs doesnít somehow also stop the engines ability to pump the oil, which Iím sure weíre good to go, but Iím not super knowledgeable on this stuff.
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      09-23-2022, 01:35 PM   #6
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Quote:
Originally Posted by Chrisguilday View Post
Oh… well that works too right? I mean the engine doesn’t start haha. I’m sure that does the same thing, right? As long as the engine turns over. Is the oil pumped mechanically?

I just want to make sure that disconnecting the coil packs doesn’t somehow also stop the engines ability to pump the oil, which I’m sure we’re good to go, but I’m not super knowledgeable on this stuff.
But yeah if no spark it won't fire so I guess that works as well. I assume the car won't just keep shooting fuel either.

If it turns it pumps the oil yeah.
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      09-23-2022, 01:43 PM   #7
Chrisguilday
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Quote:
Originally Posted by TheMidnightNarwhal View Post
But yeah if no spark it won't fire so I guess that works as well. I assume the car won't just keep shooting fuel either.

If it turns it pumps the oil yeah.
My next post will be how to fix a flooded engine 😅

Well Iím almost done then. Thanks for your help. Gotta go pickup a crankcase vent hose from oreillyís.

I didnít change the oil when doing the OFHG, but I did change the filter, so I put some extra oil in the filter area. Hopefully I did this right and my car doesnít explode in 100 miles.
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