BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

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      06-28-2016, 02:19 PM   #1
bNks334
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DIY - 128i Oil Cooler Retrofit (on a budget)

Tracking your 128i? Experiencing extreme oil temps? Want to retrofit an oil cooler on a budget? Keep reading!

Basically, oil temps quickly became an issue once I hit upper intermediate skill level with my 128i on track. After seeing temps of up to 290f+ one time I didn't book another HPDE until I got an oil cooler retrofitted. The DME begins to reduce power in stages once you hit 270f+ and goe sinto limp mode at 300f+.

The result? Temps never went above 270f with the oil cooler installed. That was with the stock oil thermostat (230-260 operating temp?) and NO air ducting to it. Once I remove my fog light, in order to increase airflow, temps were a rock solid 260f even at 90f+ ambient temps.

Items used:
* Oil filter housing (11427548032, 11427533067, and many other part numbers)
* Oil thermostat housing

* Oil cooler adapter fitting for BMW (~$20):
http://www.ebay.com/itm/281846704667...%3AMEBIDX%3AIT

* Oil cooler kit ($110):
http://www.ebay.com/itm/272055049874
25 row (19 row might fit better, or at least try to get one that is not as wide as the one I bought)
Inlet / Outlet Size: 10 AN
Core Size: 11.50" x 7.20" x 2.00"
Overall Size: 13.00"x 8.20" x 2.00"

* Air duct, engine oil cooler, right (51747194460)

* New Engine Oil Filter Housing Gasket (11427537293, 11427611391, and many other part numbers) (~$7):

Other/Misc: oil, oil filter, drill, drill bits, sheet metal screws, metal brackets, adjustable wrench (10-an fittings), 8mm socket (wheel well liner), snips, razor blade, zip ties, brake clean, and maybe a few other tools.





All-in, I spent about $350 to retrofit an oil cooler. A generic 25 row oil cooler kit on EBAY cost $125 (no different than a brand name one). The Oil thermostat housing and Oil filter housing can be taken off a TON of BMW's (http://www.realoem.com/bmw/enUS/partxref?q=11427533067). The one I bought came off a 335i. There are no moving parts other than the thermostat itself (easy to replace and cheap), so don't worry about buying used parts. You can always clean and polish the housing to look like new again!

The ER oil cooler setup is amazing, but I am pretty sure it wont work with the stock 128i bumper. You'd have a clean install on the oil cooler, but you'd still have the stock bumper with no airflow... You'd need to upgrade to the BMW performance bumper to make use of them. That's a big commitment between dropping 1k+ on the oil cooler setup and a new bumper.

Installation:

To install the Oil filter housing follow this DIY: http://www.e90post.com/forums/showthread.php?t=476419

Instead of removing the 128i fog light you can dremel out the honeycomb on the lower grill. You can duct air from there to the oil cooler in the wheel well:


Shot of things I had to trim to make the large oil cooler fit:


Here is the cooler bolted to the bracket I made. I used round rubber bushings from the plumbing isle with the bolts between the oil cooler and the bracket to dampen vibrations (can't see them in the pic because I added the bushings after I re-mounted the oil cooler):


All buttoned up. I have since remounted the cooler further back (trimmed the headlight housing and aero piece). I also made a better bracket than the one shown above:


Engine bay shot:


Does it look pretty? No. Does it work? YES. Once the fender liner is back on you can’t even notice the black oil cooler in the wheel well... it looks clean.
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128i - Depo V2 - 6000k headlights, Euro Intake, BMWPE, BMWPS, Dinan Camber Plates, E92 M3 FSB, Apex Arc-8 - 235/40/18, tints - 35%/20%

135i - VRSF DP, JB4, Apex Arc-8 - 235/40/18, M3 control arms, M3 trans mounts

Last edited by bNks334; 06-29-2016 at 04:11 PM.
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      06-28-2016, 06:26 PM   #2
squidge
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Drives: 2013 128i M-Sport
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Really appreciate the info here and your efforts in documenting it.

I don't want to do anything hacky to this particular car, so things that come from Home Depot and eBay are probably not in my future, but there's excellent food for thought here. And now you've got me wanting the BMWP bumper.
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      06-29-2016, 03:29 PM   #3
bNks334
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Quote:
Originally Posted by squidge View Post
Really appreciate the info here and your efforts in documenting it.

I don't want to do anything hacky to this particular car, so things that come from Home Depot and eBay are probably not in my future, but there's excellent food for thought here. And now you've got me wanting the BMWP bumper.
The BMWP bumper looks amazing on the 1-series! I only started hacking up my 128i because I realized that a base model automatic 128i wasn't the best platform to put money into lol

My install looks messy from those pictures, but it's rock solid and really only required drilling three holes. I can see how some people would much rather just buy the ER kit and bring it to a shop to be installed with a new bumper for a nice clean professional look. From what I understand though, you'll have to "hack" up a few places to install that kit too. The 135i wheel well liner hides everything either way!
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128i - Depo V2 - 6000k headlights, Euro Intake, BMWPE, BMWPS, Dinan Camber Plates, E92 M3 FSB, Apex Arc-8 - 235/40/18, tints - 35%/20%

135i - VRSF DP, JB4, Apex Arc-8 - 235/40/18, M3 control arms, M3 trans mounts

Last edited by bNks334; 06-29-2016 at 03:39 PM.
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      06-29-2016, 03:47 PM   #4
squidge
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I'm not a shop kind of person, but I am a quality of fit and finish kind of person. Fair point on either method requiring some kind of drilling/hacking.

It just occurred to me I have to leave it alone for another year or void my warranty anyway...
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