[StradaRedlands]

I just noticed that it looks like there are two different oil cooler options on the 535i and am wondering why that is, and if it is easy to upgrade between the two. When looking at an option list, what is the option number for the remote style?

One is the basic heat exchanger that bolts onto the oil filter housing:



The other is the fully remote oil cooler under the bumper:



I presume the heat exchange kind is fine, but I'm also presuming the remote radiator style does a better job in hot environments like mine!

Thanks for educating me!

[Fireball5657]

Originally Posted by StradaRedlands

I just noticed that it looks like there are two different oil cooler options on the 535i and am wondering why that is, and if it is easy to upgrade between the two. When looking at an option list, what is the option number for the remote style?

One is the basic heat exchanger that bolts onto the oil filter housing:

The other is the fully remote oil cooler under the bumper:

I presume the heat exchange kind is fine, but I'm also presuming the remote radiator style does a better job in hot environments like mine!

Thanks for educating me!

IIRC, the remote oil cooler on the 535i's is either part of the M-Sport package (S337) or part of the "hot-climate" version (S823). My F10 has both and it has the remote cooler in the bumper.

If you're worried about cooling, I'd suggest looking for an M-Sport car regardless. It comes with an extra coolant radiator, the auxiliary oil cooler in the bumper like above, and a transmission fluid cooler.

That being said, I'm sure the heat exchanger style would work fine in hotter climates, as long as you're not being too hard on the car and keeping an eye on your oil temps. Turbo engines do get hotter faster than N/A engines. I learned that one pretty quick going from a N52 to an N55. It would probably take a lot to retrofit the remote cooler, I can't find a configuration on RealOEM that has the oil cooler on the non M-Sport cars, so you may have to do some fabrication for the ducting and mounting in a base bumper if you don't want the M bumper. Then again, you could just get an M-sport and not worry about it at all.

[StradaRedlands]

Originally Posted by Fireball5657

IIRC, the remote oil cooler on the 535i's is either part of the M-Sport package (S337) or part of the "hot-climate" version (S823). My F10 has both and it has the remote cooler in the bumper.

If you're worried about cooling, I'd suggest looking for an M-Sport car regardless. It comes with an extra coolant radiator, the auxiliary oil cooler in the bumper like above, and a transmission fluid cooler.

That being said, I'm sure the heat exchanger style would work fine in hotter climates, as long as you're not being too hard on the car and keeping an eye on your oil temps. Turbo engines do get hotter faster than N/A engines. I learned that one pretty quick going from a N52 to an N55. It would probably take a lot to retrofit the remote cooler, I can't find a configuration on RealOEM that has the oil cooler on the non M-Sport cars, so you may have to do some fabrication for the ducting and mounting in a base bumper if you don't want the M bumper. Then again, you could just get an M-sport and not worry about it at all.

Ahhh, M Sport package, got it... That's a fantastic upgrade just in itself!
And I already want M Sport just for the anthracite headliner!!! :-)

[ChiltiCoatl89]

Yes, I have both those packages and Mine looks exactly like the One below pictured! Also great info Fireball I was wondering why some of them were different!

[Unspec]

Retrofit is pretty involved.

Stuck did a guide here a while back.

I went the lazy route and did a custom job.

[StradaRedlands]

Originally Posted by Unspec

Retrofit is pretty involved.

Stuck did a guide here a while back.

I went the lazy route and did a custom job.

I would call that the proper way to do an upgrade! I like it!!!

Do you have any sort of a parts list that you used?

[Unspec]

Originally Posted by StradaRedlands

I would call that the proper way to do an upgrade! I like it!!!

Do you have any sort of a parts list that you used?

OEM parts:

Cooler: 17217572542*

Cooler to frame bolt: 07129904819

Driver side bracket: 17117583119

Bracket bolts: 41617068715 (x2)

Dampening element between bracket and cooler: 17117575251 (x2)

F30 (NOT F80) thermostat housing: 11427637052 (F30 has 110*C thermostat, F80 has 116*C)***

*Ideally, you want to find a used cooler that comes with part numbers 17117575253 and 17117575250 attached. I haven't seen many listings on ebay that don't include them, so likely a fringe concern. You also REALLY want to find a cooler that has the original oil lines attached, such as this:



Since you'll be adapting the original lines with barb to AN 10. If you cannot find the lines chopped already, the part numbers are 17227636941 and 17227636940. That said, it's really expensive to buy the lines on their own, so I wouldn't do this retrofit unless you can find a cooler with the chopped lines already. Funnily enough, the one pictured doesn't come with part numbers 17117575253 and 17117575250 attached lol. If you buy one without those items attached, JUST buy P/N 17117575253. It comes with the rubber isolators usually.

Non-OEM parts:

Black Silicone Coolant Bypass Cap, 5/8 inch ID to cap off the coolant pipe that originally supplied coolant to oil/coolant heat exchanger (near/behind the coolant thermostat)

AN10 to 5/8 barb. Make sure to lube up the barb soften the hose via boiling to make sure they fully seat. You don't want a leak.

AN 10 120 degree swivel hose end fittings female (x2). You might need different angles depending on if you decide to go over the big radiator hose, or under it. I chose to go over it.

10 feet of AN 10 line rated for engine oil. Nylon braided is cheaper, but steel braided is more abrasion resistant, and given the custom nature of this, if I had to do it again I'd get steel braided and just sheath them in braided sleeving for the stealthy look without sacrificing abrasion resistance.

AN 10 straight/90/whatever angle you need female hose end to connect AN 10 line to the barb adapters. I say whatever angle because this will depend on where your barb adapters are relative to where the hose needs to go.

N55 oil cooler thermostat housing to AN 10 adapter. For some reason, weirdly hard to find right now. Here's the annoying part. The N55/S55 oil cooler thermostat housing mounting "hole" isn't threaded at all, so you need a really long bolt to through bolt the adapter through the top of the housing, essentially sandwiching the adapter to the housing by pulling it "up". The only adapter I can find that already comes with this fact in mind is the Mishimoto one, but it's hella expensive for what it is. You can see how the N54 one is threaded***. I somehow managed to snag one for $17, likely due to pricing error, but the LineRacing** one will likely work with a minor modification. Just find a bolt long enough that fits the housing and LineRacing adapter, and then use a nut. If the thermostat housing hole is large enough for a M8 bolt, it might be easier to just drill and tap the LineRacing hole to accept a M8 bolt.

**As always with cheapo parts, I'd upgrade the orings that come with it to something from a more reputable brand. Ideally a viton one. There's a lot of reports of the orings provided leaking.

***As another alternative, thermostat housing 11427573212 may be able to be used, allowing the LineRacing adapter to be used with no modifications or messing about. It was intended for the 6 series F cars, and I don't really know if it has any real functional differences, but you can see that that the "tail" portion of the this one is slightly different. I haven't used it, so YMMV.

6 series version:



3 series version:




I'll write a proper guide one day, but currently too busy with school. Finals are coming

[StradaRedlands]

Originally Posted by Unspec

I'll write a proper guide one day, but currently too busy with school. Finals are coming

This is VERY appreciated just as is... thank you for taking the time to write it up!!! I've done the nothing to heat exchanger on a three series, so doing a heat exchanger to a proper oil cooler is going to be next level!!! It's great just learning there is a difference on N55 engines, and then knowing the way to do it!

[Shrimpy]

As I have been browsing the F10 forum, I looked at my VIN decode sheet (from mdecoder.com) and discovered I have the S823 Hot Climate Option!!!!

Yay Me!!! Now to just make sure it stays as clean as possible to help keep the oil temps down.

[BMW FOREVER]

I have the hot climate option on my 2014 535i and mine is the first pic (heat exchanger). Mine is not M-Sport.

[Conserve]

My 2015 535i BMW Luxury line has S82 Hot-Climate option and is equipped with Heat exchanger 11427525333 (like 1st picture) and Auxiliary radiator, on R.H. side part # 17117802662.

[StradaRedlands]

Originally Posted by Conserve

My 2015 535i BMW Luxury line has S82 Hot-Climate option and is equipped with Heat exchanger 11427525333 (like 1st picture) and Auxiliary radiator, on R.H. side part # 17117802662.

But not M Sport? If so, that throws another variable out there!

[Fireball5657]

Originally Posted by Conserve

My 2015 535i BMW Luxury line has S82 Hot-Climate option and is equipped with Heat exchanger 11427525333 (like 1st picture) and Auxiliary radiator, on R.H. side part # 17117802662.

Edit: doh, I reread it and you never claimed to have an oil cooler. My apologies. Still, this could be good information.

I do believe that you have an auxiliary coolant radiator, not for engine oil. The oil cooler has a slightly different shape, and the hoses come from the top, not the side. I verified shape and hose location on my M-Sport 535i as well to be sure.

From what I see on RealOEM, an LCI 535i only has the oil cooler if the car has option S840A (High speed synchronisation), that being part of, and to the best of my knowledge only, on the M-Sport cars.

Passenger Side Aux Coolant Radiator (non M-Sport): 17117802662
Passenger Side Aux Oil Cooler (M-Sport): 17217572542

https://www.realoem.com/bmw/enUS/sho...diagId=17_0485

Hopefully this helps!

[StradaRedlands]

And I re-read it as well... I was focused on the photo of the aux radiator, thinking "oil".

D'oh!

[Conserve]

Originally Posted by StradaRedlands

But not M Sport? If so, that throws another variable out there!

No M Sport.

Honestly, I am a bit confused as why the car has auxiliary radiator and 4 variations and then there is 'engine oil cooler'

[StradaRedlands]

Just trying to keep the parts department in business!!!

[Unspec]

Hot climate version doesn't give you the oil cooler, unsure where this information came from. RealOEM is pretty explicit about how the oil cooler is only available if you have option 840 (high speed synchronisation). You only get 840 if you ordered the performance tire option, which gives you staggered tires as well.

[Shrimpy]

Originally Posted by Unspec

Hot climate version doesn't give you the oil cooler, unsure where this information came from. RealOEM is pretty explicit about how the oil cooler is only available if you have option 840 (high speed synchronisation). You only get 840 if you ordered the performance tire option, which gives you staggered tires as well.

Exactly what my car has!!! Thanks for the clarification Unspec. S823 Hot Climate, was wondering what the S840 High Speed Synchronisation was. I read that they upped the speed limiter to 155 mph. I also have the staggered wheels (Option S2K3), BMW LA Wheel V Spoke 331. Really liking this car so far.

Had it to an independent shop this week for Engine Oil Change (Liqui Moly 5w/30), Differential oil change (factory BMW oil), Manual Transmission oil change (factory BMW oil) and brake flush (again with factory BMW fluid). They also did a once over on everything. Valve cover gasket good, OFHG weeping slowly and engine oil pan weeping slowly. They said to keep a close eye on the OFHG. It's not puddling or dripping, said it would need to be done in the next six to eight months to be safe. I'll do it myself before then.

[ezaircon4jc]

Originally Posted by Shrimpy

Exactly what my car has!!! Thanks for the clarification Unspec. S823 Hot Climate, was wondering what the S840 High Speed Synchronisation was. I read that they upped the speed limiter to 155 mph. I also have the staggered wheels (Option S2K3), BMW LA Wheel V Spoke 331. Really liking this car so far.

Had it to an independent shop this week for Engine Oil Change (Liqui Moly 5w/30), Differential oil change (factory BMW oil), Manual Transmission oil change (factory BMW oil) and brake flush (again with factory BMW fluid). They also did a once over on everything. Valve cover gasket good, OFHG weeping slowly and engine oil pan weeping slowly. They said to keep a close eye on the OFHG. It's not puddling or dripping, said it would need to be done in the next six to eight months to be safe. I'll do it myself before then.

Be sure to follow the priming procedure after replacement.

[StradaRedlands]

Originally Posted by ezaircon4jc

Be sure to follow the priming procedure after replacement.

I've read about that, and being new to the N55, am kind of vague on it.
What is the best practice for disabling the fuel delivery?
Do you pull a fuse, or unplug harness, or some other process????

[Shrimpy]

Originally Posted by StradaRedlands

I've read about that, and being new to the N55, am kind of vague on it.
What is the best practice for disabling the fuel delivery?
Do you pull a fuse, or unplug harness, or some other process????

Thanks for the heads up ezair!! I have seen a couple of YT videos that explain it pretty well. If I remember correctly it's the Fuel Injection harness or fuse. And, you need to use a certain time sequence (number of seconds) of key on, key off with a battery charger hooked up to keep things rolling.

[Conserve]

Originally Posted by StradaRedlands

I've read about that, and being new to the N55, am kind of vague on it.
What is the best practice for disabling the fuel delivery?
Do you pull a fuse, or unplug harness, or some other process????

Fuel pump/ delivery controlled by 3 fuses located in the trunk (at least on mine/ 2015 535i). You should be able to find piece of paper in there too that map out all the fuses. pull the fuses out for fuel delivery first (in my case 3), then start your engine and within very short time your engine will stop. Now your ready to do the OFHG and priming the engine after without any concern. Alternative method would be to pill out the coils, but that would involve unnecessary removal of several components.

BTW, attached picture/ procedure is from a member that posted in another post when took his car to BMW dealer.