I have run an S54 oil pump in my S52B32 at the track for 2 years now and yes, it is the right upgrade/mod for the S50/S52 engine relegated for track use only.
To the question, a stock S54 pump with an S52 sprocket tack welded or wired in place does the trick. No internal mods need to be done. The critical issues with the oiling system on the track is the dual pickup system of the S54 vs. S52. The other critical component for track or street is the securing of the sprocket/nut on either (IMHO)
shameless bump here btw...
http://api.viglink.com/api/click?for...8123-235408%3F
97 Artic Silver E36 M3 Coupe; Track RAT (Thanks to Irish M3 for the guidance)
Full Track suspension via TC Kline; TMS and BW; BFG R-Comps; Custom Splitter made by Amir; 3.64 LSD 40% Lock-up; 24lb inject; M50; Dinan TB; 803; 3.5" CAI; Supersprint LTH & AA 3" race exhaust; S54 oil pump combo; BW fuel starvation kit; tuned by Epic Motorsports (thanks to Randy Mueller...253/242 on race gas via DynoJet)
https://www.facebook.com/groups/bimmerchallenge/
Neil - Thanks or the info, useful.
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One weird thing about my S52: It only shows oil pressure dips in high-g, right hand turns, not left hand as everybody else seems to encounter. My car has the Turner oil baffle kit. My mechanic dropped the pan, and all baffles are in place, pump looks brand new, etc.
97 Artic Silver E36 M3 Coupe; Track RAT (Thanks to Irish M3 for the guidance)
Full Track suspension via TC Kline; TMS and BW; BFG R-Comps; Custom Splitter made by Amir; 3.64 LSD 40% Lock-up; 24lb inject; M50; Dinan TB; 803; 3.5" CAI; Supersprint LTH & AA 3" race exhaust; S54 oil pump combo; BW fuel starvation kit; tuned by Epic Motorsports (thanks to Randy Mueller...253/242 on race gas via DynoJet)
https://www.facebook.com/groups/bimmerchallenge/
head
spinning
good stuff
Thank you OP for making this thread.
Can someone comment on where to get this other relief spring? dealer part? or just get a washer which is 1.0 or 1.5mm thick and re-use old s54 spring? or re-use s50 or s52 spring? thanks!
I'm researching my engine build now.
After reading this (great) thread I'm wondering if anyone has received a machined S54 pump with no rotors from VAC? It seems to me, I could reuse my (perfectly fine) S52 rotors, shaft and sprocket- I just need the pump body opened up to acomodate the larger rotors.
I'll wire the bolt- not a fan of welding this...
Thanks in advance!
Ps: anyone have the part number for the Motorsport oil pump chain? I didn't see it here...
Last edited by tiMASTER; 02-26-2017 at 02:21 PM.
As far as I know they have the part numbers as the regular chains.
Regular: http://www.rmeuropean.com/Products/1...FG48-V553.aspx
Motorsport: http://www.rmeuropean.com/Products/1...G255-V553.aspx
Regular: http://www.rmeuropean.com/Products/1...FG48-V553.aspx
Motorsport: http://www.rmeuropean.com/Products/1...G255-V553.aspx
Regular: http://www.rmeuropean.com/Products/1...FG48-V553.aspx
Motorsport: http://www.rmeuropean.com/Products/1...G255-V553.aspx
Thank you!
I assume this is a vendor you use as well? I've never used them before (or heard of them for that matter...)
"Speed's just a question of money. How fast you 'wanna go?"
PM me for E36 engine swap books and BMW ETMs! NOW SHIPPING!!!
I spoke with VAC today and they can do the S54 pump in a high volume version for the S52. They have the rotors made to their spec which is very close to stock S52. I guess if you converted to solid lifters in an S52 the S54 pump could be used as-is. With hydraulic lifters you need the volume.
In case anyone was wondering.
Although I could machine the pump housing myself, I was not suggesting I would.
I have seen members shim the relief valve slightly, which was said to fix the issue with low pressure at idle; i did it to my pump and it only helped a little bit, havent done a pressure test but the idiot like flickers slightly at idle. Could be some other issue but this is what im seeing right now. Couldnt go with the vac upgrade as it was way out of my budget. I guess if you have the dough, do it. That being said, anybody have any suggestions for my case? The light goes away if I rev the car a hair, so raising the ide via software is one option. Anything else i should look at?
Car is a 99 M3, using 5w40 oil atm.
Would be interested in a resolution for this as well as I have the same issue with using the pump on the S52. Low oil pressure light flickers at idle, but goes away with ever so slight of an increase in RPM. Normal pressure at WOT peaks at the relief valve settings of 55 psi or so.
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Update on my situation, pretty sure i had tiny vacuum leak somewhere, causing the car to idle low. Doesnt do it anymore for the most part, only when the car bogs down with the AC on, probably due to some other issue; looking into it now. I think its sorta safe to say the washer trick worked out, if anybody says otherwise id be very interested in your opinion.
I straightened the s50 dipstick a few degrees and mated it with a pre '03 s54 oil pan. I think the clearance between the end of the dipstick and the oil pan is only around 2mm. Should I trim 3-5mm off the dipstick for better flow? The larger of the cover is convex about 4mm?
Also, to confirm the torque for the main rod bolts (x4) are 20nm then 50 degrees using clean, oiled bolts? I read somewhere that the torque should be 20nm then 70 degrees?
20nm then 50 degrees on dry (used brake cleaner) bolts is not tight enough yes? Thanks for any advice.
This is what I did. From the TIS; "Main Bearing Srews"
crankbolts.png
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FYI, The M54, and others, are listed at 20Nm, 70 deg, so maybe that's where the confusion comes from.
Thank you!
here's the actual online link.
https://www.newtis.info/tisv2/a/en/e...arings/5TwyPPh
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Also, FYI any time there's a "torque + angle", you'll used clean oiled bolts/screws.
A question with regards to the ‘LWT Trunk Kit” pan/pump/pickup.
Is the ‘LWT’ S50 (Euro) pump similar enough to the E46 OP such that the VAC ‘fix’ can be accomplished on this pump also?
... it appears as though the inner impeller p/n 11411748098 is turning up NLA.
Ref. Outer Rotor 11411748100
Last edited by bluptgm3; 01-03-2021 at 02:53 PM.
Short answer: yes.
There are minor external cosmetic differences between the older Euro dual pickup oil pump and the later S54 version, but the internals appear to be the same. In fact VAC accepted an extra Euro pump I had on hand as a core for their upgrade. Of course the original oil pressure pump section internals get discarded anyway.
Whether VAC buys and fits original BMW single chamber gerotor pairs for their upgrade, or makes their own replacements, has been a matter of speculation. I sure don’t know the answer to that. In fact if BMW doesn’t manufacture the pump themselves, maybe the replacement guts come from the original supplier?
Neil
An excellent thread, still have some questions though:
Can the stock S50 dipstick tube be used or is a s54 tube required?
Is there a gasket for the return pickup tube to pump or do people use rtv?
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