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      04-09-2017, 08:05 PM   #1
jack335i
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Suggestions? 2007 E90 335i w/out oil cooler in SoCal - Heat Issues

As title mentions, I live in SoCal and happen to own one of the lucky 2007 Sport builds that did not include the oil cooler from factory (02/2007 build). Even though it is listed on my parts list, it was never installed at the factory .

Since the environment I live in gets very hot, especially here in the months to come, I am hoping to get some suggestions on how to lower my overall engine oil/engine bay temperature.

Last summer, my oil temps were reaching as high as 250-260ish on a consistent basis. My charge temps were getting as high as 155-160 while sitting in traffic as well.

Since last summer I have added a Mishimoto FMIC, the BMS cowl/air filter delete, and will also be switching to a 5w-40 engine oil very soon (heard this helps a little).

Are there any other simple-ish things I can do to drop the temps a few degrees apart from retrofitting an aftermarket oil cooler? I have heard mixed reviews about using coolant additives in these cars and would like to hear from some people who have tried them.
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      04-09-2017, 10:37 PM   #2
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No simple fixes, at least none that I would recommend. Best thing to do is the aftermarket oil cooler. I live in the Palm Springs area so I know what you're talking about. It's been summer here since February. I did the twin cooler setup and FMIC.
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      04-10-2017, 01:11 AM   #3
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Quote:
Originally Posted by pajuis View Post
No simple fixes, at least none that I would recommend. Best thing to do is the aftermarket oil cooler. I live in the Palm Springs area so I know what you're talking about. It's been summer here since February. I did the twin cooler setup and FMIC.
I may eventually retrofit one but I am looking for easier options first. I am considering doing the distilled water & water wetter combo for coolant but I've read mixed things...

Maybe a 15% bmw oe coolant / 85% distilled water + water wetter?
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      04-10-2017, 01:38 AM   #4
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Why not just buy an oem oil cooler?

Sounds like easy way to succeed to me.
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      04-10-2017, 12:20 PM   #5
jack335i
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Quote:
Originally Posted by tlow98 View Post
Why not just buy an oem oil cooler?

Sounds like easy way to succeed to me.
The problem with that is it would be a bigger investment on this car. It is at 95K miles now and I don't plan on keeping it past 125K miles before I upgrade to a 2012/13 is.

Maybe upgrading the radiator would be a more practical option.
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      04-10-2017, 12:41 PM   #6
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Quote:
Originally Posted by jack335i View Post
The problem with that is it would be a bigger investment on this car. It is at 95K miles now and I don't plan on keeping it past 125K miles before I upgrade to a 2012/13 is.

Maybe upgrading the radiator would be a more practical option.
Is the car going in to limp mode? 260*F is high, but it's not out of the design parameters for the car. If it's not in limp mode, I don't see the issue.

You can buy all of the OE oil cooler hardwear on here used for a couple hundred dollars - not a big investment, imo.
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