When does the oil cooler kick in?

archtop · 08-07-2007, 06:40 PM

Any one know at what temp.the oil cooler thermostat opens at,I was told 260 which seems really high.

ward · 08-07-2007, 06:51 PM

is there an oil cooler t-stat?

!Xoible · 08-07-2007, 06:55 PM

it activates before the shit hits the fan

jk

jasonn · 08-07-2007, 06:55 PM

oil cooler is always on.

A418t81 · 08-07-2007, 07:09 PM

There is no oil cooler T-stat. The oil cooler system has a bypass built in before the cooler that the ECU controls with a solenoid. It appears the ECU shoots for around 240 deg oil temps.

archtop · 08-07-2007, 07:14 PM

Now I'm more confused,so many different answers!

jon@themshop · 08-07-2007, 07:17 PM

According to BMW there is an oil t-stat.

BMW Part number 11-42-7-564-892

Sorry but I can't find the spec on which the thermostat starts to open.

bilworth · 08-07-2007, 07:54 PM

Quote:

Originally Posted by jon@themshop

According to BMW there is an oil t-stat.

BMW Part number 11-42-7-564-892

Sorry but I can't find the spec on which the thermostat starts to open.

230 F.

archtop · 08-07-2007, 08:02 PM

Quote:

Originally Posted by bilworth

230 F.

Is this fact or speculation?

Park2670 · 08-07-2007, 08:05 PM

It definitely has a thermostat, I saw it when installing an oil cooler. Just dont know when it opens, I will say 230-240 thats where my car stays at.

A418t81 · 08-07-2007, 09:13 PM

Thats very interesting as I was reading a PDF that specifically stated the car did not use conventional thermostat and basically was bragging about using the computer controlled bypass setup that is diagrammed above. Not that surprising though, there's rampant misinformation about these cars floating about.

thealbert · 08-07-2007, 09:18 PM

Here's a picture of the thermostat housing, BMW Part number 11-42-7-564-892.

Oil coolers DO come with thermostats.

As to at what temperature does the oil cooler kick in? Sorry, don't know. hehe

e36jakeo · 08-08-2007, 12:55 AM

Normal operating temp seems to be 240 F, so I'd guess oil flows to the cooler when it gets a bit higher than that.

jbake · 08-08-2007, 12:58 AM

i wish there was a light or something that came on when it is working

533ogetnom · 08-08-2007, 01:40 AM

Quote:

Originally Posted by archtop

Is this fact or speculation?

well given that most people have oil temps around 230-240 steady w/ cooler there are two options

1: thats where the oil cooler opens and is big enough to dissipate any heat buildup

2: it open prior to 240 but reaches a critical efficiency at 240 that cannot be overcome by heat generated by the engine

#1 is much more likely and #2 is near impossible given that people in very different conditions experience the same temps

turbojet3 · 08-08-2007, 09:38 AM

It opens @ 180-200. You can open the hood and put your hand on the oil lines and they are hot before your gauge reads 200

leftcoastman · 08-08-2007, 10:16 AM

Quote:

Originally Posted by Park2670

It definitely has a thermostat, I saw it when installing an oil cooler. Just dont know when it opens, I will say 230-240 thats where my car stays at.

Park - you're running 6MT right? Did you install an aftermarket cooler? If so - I WANT I WANT!

Park2670 · 08-08-2007, 10:47 AM

Quote:

Originally Posted by leftcoastman

Park - you're running 6MT right? Did you install an aftermarket cooler? If so - I WANT I WANT!

Nope, was watching a tech install a retrofit.

Dinan came out and showed me their S3-M3, the driver told me while we were doing 120 on a 40 mph street that they have a larger oil cooler coming out soon for the 335i. Probably cost too much though.

RiXst3r · 08-08-2007, 11:41 AM

before the oil cooler my car ran at 255-265, all the time.

after the cooler, it runs at 230-240 all the time.

Based on how the car warms up to around 200 pretty quick, and then takes much much longer, sometimes never even reaching 220 in a 15 minute drive, I would have to say that the thermastat opens around 200

hool97 · 08-08-2007, 03:20 PM

I agree its likely 190-200 degrees computer controlled if it is electronic. If it were a mechanical thermastat then it would have an opening range say from 185-200 degrees.

max boost · 08-08-2007, 04:08 PM

Quote:

Originally Posted by hool97

I agree its likely 190-200 degrees computer controlled if it is electronic. If it were a mechanical thermastat then it would have an opening range say from 185-200 degrees.

your car came w/cooler?
i called bmw usa and they hooked me up!

turbodan · 08-08-2007, 04:27 PM

BMW oil coolers have always been thermostatically controlled. Since the e30 325i and e28 M5. Cooling the oil before its too hot is actually a bad thing. Oil works best at a certain temperature, so you want it to warm up as quickly as possible.

Just because the lines are hot doesnt mean the thermostat is open either. The engine compartment is a hot place, and the airflow through the radiator blasts the front of the engine with the heat taken from the coolant. Five minutes of running will heat it all up in there. If the cars with coolers dont get above 230 or 240, I'd say thats exactly where the thermostat is opening. Once its fully open, the oil isnt going to get any hotter. Its got more oil cooling capacity than the car needs.

08-07-2007, 06:40 PM	#1
archtop Private 7 Rep 61 Posts Drives: 2011 135i E88 DCT Join Date: Jan 2007 Location: franklin nc iTrader: (0)	When does the oil cooler kick in? Any one know at what temp.the oil cooler thermostat opens at,I was told 260 which seems really high.
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08-07-2007, 06:55 PM	#3
!Xoible Banned 837 Rep 46,029 Posts Drives: .... Join Date: Nov 2006 Location: . iTrader: (4) Garage List 2008 M3 [4.00] 2007 335i [9.00] 2008 528i [8.00] 2006 Infiniti - G35 ... [8.00]	it activates before the shit hits the fan jk
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08-07-2007, 06:55 PM	#4
jasonn JDM Slut 143 Rep 4,233 Posts Drives: 07 e90 335i Join Date: Feb 2006 Location: CA iTrader: (12) Garage List 2014 PORSCHE CAYMAN [10.00] 2013 BMW X1 [9.00] 2014 BMW X5 xDrive35i [9.00] 2013 PORSCHE 991 [10.00] 2007 BMW 335i [9.08]	oil cooler is always on.
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08-07-2007, 07:09 PM	#5
A418t81 Lieutenant Colonel 296 Rep 1,515 Posts Drives: Ever changing fleet Join Date: May 2007 Location: Alabama iTrader: (1) Garage List 2013 335is [0.00]	There is no oil cooler T-stat. The oil cooler system has a bypass built in before the cooler that the ECU controls with a solenoid. It appears the ECU shoots for around 240 deg oil temps. __________________ 23 iX M60, 24 GT3 RS Weissach, 22 Rivian R1T, 23 RS3, 13 E92 M3 Competition: Akra Evo, KW V3, etc
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08-07-2007, 07:14 PM	#6
archtop Private 7 Rep 61 Posts Drives: 2011 135i E88 DCT Join Date: Jan 2007 Location: franklin nc iTrader: (0)	Now I'm more confused,so many different answers!
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08-07-2007, 06:51 PM	#2
ward Major General 155 Rep 6,158 Posts Drives: F Join Date: May 2005 Location: T iTrader: (0)	is there an oil cooler t-stat?
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08-07-2007, 07:17 PM	#7
jon@themshop Captain 38 Rep 762 Posts Drives: BMW Join Date: Apr 2007 Location: Los Angeles/Eagle Rock, CA iTrader: (8)	According to BMW there is an oil t-stat. BMW Part number 11-42-7-564-892 Sorry but I can't find the spec on which the thermostat starts to open. Attached Images
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08-07-2007, 08:05 PM	#10
Park2670 General 355 Rep 18,218 Posts Drives: Tesla Model 3 Join Date: Jan 2006 Location: UTAH iTrader: (8)	It definitely has a thermostat, I saw it when installing an oil cooler. Just dont know when it opens, I will say 230-240 thats where my car stays at. __________________
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08-07-2007, 09:13 PM	#11
A418t81 Lieutenant Colonel 296 Rep 1,515 Posts Drives: Ever changing fleet Join Date: May 2007 Location: Alabama iTrader: (1) Garage List 2013 335is [0.00]	Thats very interesting as I was reading a PDF that specifically stated the car did not use conventional thermostat and basically was bragging about using the computer controlled bypass setup that is diagrammed above. Not that surprising though, there's rampant misinformation about these cars floating about. __________________ 23 iX M60, 24 GT3 RS Weissach, 22 Rivian R1T, 23 RS3, 13 E92 M3 Competition: Akra Evo, KW V3, etc
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08-07-2007, 09:18 PM	#12
thealbert Lieutenant 32 Rep 420 Posts Drives: G20 M340i xDrive Join Date: Feb 2007 Location: Home Sweet Home iTrader: (0)	Here's a picture of the thermostat housing, BMW Part number 11-42-7-564-892. Oil coolers DO come with thermostats. As to at what temperature does the oil cooler kick in? Sorry, don't know. hehe Last edited by thealbert; 08-09-2007 at 07:57 PM..
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08-08-2007, 12:55 AM	#13
e36jakeo Captain 36 Rep 625 Posts Drives: 2008 M3 6 Speed MT! Join Date: Oct 2006 Location: Northern CA iTrader: (0)	Normal operating temp seems to be 240 F, so I'd guess oil flows to the cooler when it gets a bit higher than that. __________________ Driving sideways: It's not faster, but damn it's more fun!
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08-08-2007, 12:58 AM	#14
jbake OG 77 Rep 930 Posts Drives: F80 M3 Join Date: Feb 2007 Location: Cen Cal iTrader: (0)	i wish there was a light or something that came on when it is working
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08-08-2007, 09:38 AM	#16
turbojet3 First Lieutenant 11 Rep 325 Posts Drives: E92 335 Join Date: Dec 2006 Location: C. FL. iTrader: (0)	It opens @ 180-200. You can open the hood and put your hand on the oil lines and they are hot before your gauge reads 200 Last edited by turbojet3; 08-08-2007 at 09:38 AM.. Reason: sp
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08-08-2007, 11:41 AM	#19
RiXst3r 274 Rep 6,510 Posts Drives: M235i Join Date: Sep 2006 Location: Ohio iTrader: (14)	before the oil cooler my car ran at 255-265, all the time. after the cooler, it runs at 230-240 all the time. Based on how the car warms up to around 200 pretty quick, and then takes much much longer, sometimes never even reaching 220 in a 15 minute drive, I would have to say that the thermastat opens around 200
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08-08-2007, 03:20 PM	#20
hool97 Private First Class 2 Rep 110 Posts Drives: 335i Join Date: Apr 2007 Location: SoCal iTrader: (0)	I agree its likely 190-200 degrees computer controlled if it is electronic. If it were a mechanical thermastat then it would have an opening range say from 185-200 degrees.
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08-08-2007, 04:27 PM	#22
turbodan Homemade turbo 2 Rep 80 Posts Drives: 1988 BMW 528e... Join Date: Jun 2007 Location: Juarez iTrader: (0)	BMW oil coolers have always been thermostatically controlled. Since the e30 325i and e28 M5. Cooling the oil before its too hot is actually a bad thing. Oil works best at a certain temperature, so you want it to warm up as quickly as possible. Just because the lines are hot doesnt mean the thermostat is open either. The engine compartment is a hot place, and the airflow through the radiator blasts the front of the engine with the heat taken from the coolant. Five minutes of running will heat it all up in there. If the cars with coolers dont get above 230 or 240, I'd say thats exactly where the thermostat is opening. Once its fully open, the oil isnt going to get any hotter. Its got more oil cooling capacity than the car needs.
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