Oil Cooler Line Thermostat Question

n55PR · 07-16-2012, 10:46 PM

I bought my N55 e90 a month ago, prior owner had removed the oil t-stat. Is the conclusion NOT to remove it?

The best practice is to put the spring in tha back of the t-stat pluger to force oil flow to the cooler all the time, correct?

I took my car the track 2wks ago running map 1 on the JB4 and oil temp peaked just below 260 during 4 20min sessions. I had Maxcool option running. So things went ok, however next session in August i plan to run a bit more power after some suspension upgrades and anticipate cooling will be more of an issue.

neilvosko · 07-17-2012, 12:03 AM

For track in the summer you need dual oil cooler in addition to t stat modification....end of story.
Yeah just put the spring in he back of plunger to keep it I place.

n55PR · 07-17-2012, 08:14 PM

Well I re-installed the oil t-stat with the spring on the "wrong" side. Big differnce from not having the t-stat to this setup. Without the T-stat I would be at 250 on the highway while esay driving, now its down to 235-240. Oil takes a lot longer to warm up. I was running 230 until I hit the throtle hard a couple of times, then it went up to 240.

Taking out the t-stat is definetively a no-no.

07-16-2012, 10:46 PM	#177
n55PR Private First Class 6 Rep 132 Posts Drives: 335i M-sport e90 Join Date: Jun 2012 Location: Puerto Rico iTrader: (2)	I bought my N55 e90 a month ago, prior owner had removed the oil t-stat. Is the conclusion NOT to remove it? The best practice is to put the spring in tha back of the t-stat pluger to force oil flow to the cooler all the time, correct? I took my car the track 2wks ago running map 1 on the JB4 and oil temp peaked just below 260 during 4 20min sessions. I had Maxcool option running. So things went ok, however next session in August i plan to run a bit more power after some suspension upgrades and anticipate cooling will be more of an issue.
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07-17-2012, 12:03 AM	#178
neilvosko Lieutenant Colonel 93 Rep 1,529 Posts Drives: 335i e92 FBO Join Date: Dec 2011 Location: miami iTrader: (19)	For track in the summer you need dual oil cooler in addition to t stat modification....end of story. Yeah just put the spring in he back of plunger to keep it I place.
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07-17-2012, 08:14 PM	#179
n55PR Private First Class 6 Rep 132 Posts Drives: 335i M-sport e90 Join Date: Jun 2012 Location: Puerto Rico iTrader: (2)	Well I re-installed the oil t-stat with the spring on the "wrong" side. Big differnce from not having the t-stat to this setup. Without the T-stat I would be at 250 on the highway while esay driving, now its down to 235-240. Oil takes a lot longer to warm up. I was running 230 until I hit the throtle hard a couple of times, then it went up to 240. Taking out the t-stat is definetively a no-no.
	Appreciate 0 Quote