There is a later SIB about priming - SIB 11 02 20 - which explicitly refers to different engine models including the N55. I found out about all this the hard way. I've read about in some cases it taking a minute of cranking to see oil in the oil filter housing as opposed to 30 seconds (e.g. 3 x 10 seconds). Some people suggest removing the spark plugs to aid the cranking process (I would do this if doing the job myself). Another recommendation was - if you remember - was to pull the fuse for the fuel pump before starting a job like the oil filter housing gasket, and running it the engine until it dies so save the work of disconnecting all the injectors. Another post I read talked about disconnecting one of the leads at the battery that disables the ECU to stop it starting (note creates a bunch of fault codes apparently). Another person I spoke to says they would just disconnect the crank sensor. Any of these other methods need testing first that they will stop fuel being delivered. Thanks for posting, hope it saves some people from finding out the hard/ expensive way.

@bavhaustv9795

5 ай бұрын

Thanks for the feedback! We’ll add the second bulletin to the description. And so many people find out the hard way when it comes to these engines. A lot of people are in denial because it doesn’t happen to them but we have a network of shops and technicians and if you ask any of them about how many knocking n55s they see the response is always “too many”. We’ve seen quite a few and even have one at the garage right now that somehow got rod knock during a starter intermediately failing. As for removing the spark plugs it’ll definitely aid in cranking, and this is one of those things that overkill won’t do any harm. We personally have a tool to prime the oil so we never actually go about it the way shown. We fill the oil through the pressure sensor and lubricate the entire engine prior to startup. This video was made just to educate the DIYer on what they should be doing. -Mike

great stuff!! I'll be doing this on my n52

@bavhaustv9795

5 ай бұрын

We always do it to n52s as well! There’s been quite a few n52s we’ve seen with rod knock. Happy to help! -Mike

Thank you.

man i wish i could afford a coupe

Why not disconnect the injector harness from DME instead of disconnecting each injector which requires removing a cowl. It’s the connector by the firewall and it disconnects injectors and coils.

@bavhaustv9795

5 ай бұрын

The injector harness is the furthest back, removing any connectors from the dme would require you to first disconnect the battery, and the service bulletin from BMW recommends it as shown in the video

Logic follows you do the same thing after an oil change, right?

@bavhaustv9795

2 ай бұрын

Not necessarily. There’s a check valve in the oil filter housing that prevents the primed oil from returning to the pan. So in most cases you should be fine. We just do it every time we finish up on an n55 as a precaution. -Mike

Can't we just pull out the fuel pump fuse ?

@bavhaustv9795

5 ай бұрын

That’s possible too. The earlier bulletin recommended pulling the fuse but it was changed to disconnecting the injectors. Maybe as to avoid ripping the interior apart to access the fuse. But this video is done as the bulletin listed recommends.

@stephanelouvet1113

5 ай бұрын

Thing is, if it remains residual pressure in the fuel rail, the engine will fire for few revolutions. Next time I'll do my oil change, I'll starve the engine from fuel before proceding.

@bavhaustv9795

5 ай бұрын

@@stephanelouvet1113 the engine will not activate the injectors so having fuel in the rail makes no difference.

@russg2279

5 ай бұрын

@@bavhaustv9795the engine does fire if you only pull the fuel pump fuse. I have done it that way and it only works if you pull the fuse and then leave the car sitting for long time (like storing it for winter).

@bavhaustv9795

5 ай бұрын

@@russg2279 oh I was still referring to disconnecting the injectors

You're doing this even after a simple oil change? Makes me want to ditch my '11 135i. How come these engines are so fragile?

@bavhaustv9795

5 ай бұрын

Not this procedure directly. There’s a tool that primes the engine as it fills it. Taking it that far is just insurance