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Old 11-15-2009, 04:44 AM   #1
PEI330Ci
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M54B30 Oil Squirters (Version 2)

The M54B30 uses oil sprayed onto the bottom of the piston to both lubricate and cool the piston assembly. This is actually quite a common approach in modern production engines, but it is taken to extremes in many race engines. F1 engines for example employ upwards of 6 oil squirter nozzles per bore.

The M54B30 uses a single squirter nozzle which is located at the bottom of the piston bore pointed up towards the piston assembly. The OEM squirter employs a check valve that only opens when the oil pressure is above a certain value. This helps keep oil flow to bearing surfaces high when the engine is at idle when warm. Below are the OEM oil squirters install in the block:



The design works well for daily driving, but has been found to be weak under race conditions.

What happens under racing conditions? The squirter nozzle has broken off on a number of engines with medium to high milage.

Why does this happen? The M54B30 has a lot of vibration (Harmonics) present in the block above 6000rpm, which fatigues the oil squirter assembly.

The solution? Have new oil squirters machined out of material that will last.

Luckily, Bimmerworld had addressed this problem with their 2.5L M54B25 engines used in their World Challenge cars. These engines were seeing well over 8000 RPM on track, and were bulletproofed with numberous upgrades like new oil squirters. So I placed an order for a set of custom CNC'd aluminum oil squirters. The images below show what I recieved compaired to the OEM squirter:







They looked like jewelry...I was kind of disapointed to be hiding them inside of the engine:



However, a trial fitment with the crank in the block found clearance problem #1:



The crank on the M54B30 has a longer stroke than the M54B25, and the counter weights hit the fastener which is sticking up a little bit too high on the billet oil squirters.

The solution was to machine all of the oil squirters to drop down the fastener:



Then I found clearance problem #2: The timing wheel hit the oil squirter nozzle on cylinder #6. The solution was to grind down the squirter as much as I dared, and then bend it down a small amount. The picture below shows the result of my handy-work. The top oil squirter is for cylinder #6:



Then while assembling the engine, we found clearance issue #3: The piston skirts struck the oil squirters.

So the bottom end was disassembled, and a relief was cut into all 6 pistons.

So I got the M54B25 oil squirters to fit, but it wasn't exactly a bolt-on modification.
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Old 11-15-2009, 04:45 AM   #2
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Damn, I learned a lot from that!
Quality thread like always!
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Last edited by ProchaineStation; 11-15-2009 at 04:50 AM.
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Old 11-15-2009, 05:17 AM   #3
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Recently on a project I've been consulting on in Sweden, the oil squirter issue came up. The builder decided to take some of what I had learned, and incorporate it into a new design:



From this, the first prototype was made:





A few final adjustments were made, and this is the result:











The new design bolts into the M54B30 block without modification, clears the crank counter weights, and the timing wheel. The only part that an engine builder needs to oversee, is the clearance of the piston skirts.

Cost for the new design is somewhere between $250-$300 plus shipping from Sweden. If anyone is interested in purchasing a set for their race engine, I can be reached via PM for contact details.

I'm not selling these myself, but I am willing to pass on a source for a hard to find part.
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Old 11-15-2009, 05:20 AM   #4
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why aren't you using those in your car?
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Old 11-15-2009, 08:17 AM   #5
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As usual great writeup PEI
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Old 11-15-2009, 09:56 AM   #6
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Old 11-15-2009, 09:02 PM   #7
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Quote:
Originally Posted by BMWfanfromQuebec View Post
why aren't you using those in your car?
How many engines do you think I'm building?

I already have a set of billet oil squirters and they work fine.

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Originally Posted by B33MER View Post
As usual great writeup PEI
Thanks
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Old 11-16-2009, 02:58 AM   #8
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As usual great writeup PEI
+1

Adam,
Thanks for introducing us to another source for these unique parts. When I'm ready to use these, I now know where to find them.
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Old 11-17-2009, 10:27 PM   #9
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Interesting, I should drop my pan again to see if mine have broken off again.
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Old 11-18-2009, 03:06 AM   #10
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Would the engine throw some kind of code if they broke off?
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Old 11-18-2009, 05:19 AM   #11
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Would the engine throw some kind of code if they broke off?
No it wouldn't trigger a code.

The part that breaks off directs the flow of oil, but it doesn't meter the flow of oil. You wouldn't see any change in oil pressure, although there would be increased wear on the piston assembly. (Rod end bearing, wristpin, skirts, rings)
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Old 11-18-2009, 05:22 AM   #12
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Quote:
Originally Posted by pei330ci View Post
How many engines do you think I'm building?

I already have a set of billet oil squirters and they work fine.


lol, yes okay, did not have to get mad.
I just though those were produced before you made yours
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Old 11-18-2009, 05:48 AM   #13
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lol, yes okay, did not have to get mad.
I just though those were produced before you made yours
The first ones were made for my engine back in 2007. (Pictures at very top of thread) The second version was made for a friend's engine in 2009.

Are you interested in a set?
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Old 11-18-2009, 05:50 AM   #14
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Originally Posted by pei330ci View Post
The first ones were made for my engine back in 2007. (Pictures at very top of thread) The second version was made for a friend's engine in 2009.

Are you interested in a set?
No, I'm 15.
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Old 11-21-2009, 08:10 AM   #15
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No, I'm 15.
There are no age limit for those.
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Old 11-21-2009, 08:21 AM   #16
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let me get my license first lol
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Old 11-21-2009, 08:39 AM   #17
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let me get my license first lol
It's when you get your license, your car schould be standing there, turn-key ready with oílsquirters that wont failure.
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Old 11-21-2009, 10:56 AM   #18
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It's when you get your license, your car schould be standing there, turn-key ready with oílsquirters that wont failure.
Maybe I should start off with expansion tank lol.
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Old 11-21-2009, 12:54 PM   #19
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THANK YOU ADAM I will be using these for sure when I rebuild my bottom end.

Any recommended shops in canada that would be able to rebuild a M54B30 bottom end for F/I? unless your services would be available how much $$$?
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Old 11-21-2009, 06:21 PM   #20
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Does the S54 have this same problem?
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