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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Tue, Jul-27-2010, 02:37:47 AM   #1
pham
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Default Oil Filter Housing - Thermostat?

Is there a thermostat in the S54 housing? Does the oil begin to flow to the oil cooler at a certain temperature? Or does it being to cool at engine start up?
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Old Tue, Jul-27-2010, 05:49:37 PM   #2
wilsel
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Yes, there is a valve near the filter housing. It does not send oil to the oil cooler at startup, but does after the engine reaches normal operating temperature. This is to help the car warm up faster, and reduce cold start emissions. A few people that track their cars have removed this valve so the oil circulates thru the cooler faster.
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Old Wed, Jul-28-2010, 02:54:21 AM   #3
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Just the answer I was looking for - Thanks
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Old Fri, Nov-15-2013, 07:41:38 PM   #4
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Default Re: Oil Filter Housing - Thermostat?

Quote:
Originally Posted by wilsel View Post
Yes, there is a valve near the filter housing. It does not send oil to the oil cooler at startup, but does after the engine reaches normal operating temperature. This is to help the car warm up faster, and reduce cold start emissions. A few people that track their cars have removed this valve so the oil circulates thru the cooler faster.
Bringing this back from the dead.

i wanted to correct the above poster as i ran across this while searching for normal oil temperatures(just had a cooling system service done and wanted to make sure temperature are where they should be).

The Oil Cooler thermostat is OPEN at start-up, even when the engine is cold. I know this because after reading the above i started my car with the oil cooler disconnected(was doing some front end work and needed to move the car in the garage) and oil immediately started shooting out from the oil cooler lines.

hopefully this will save someone the time to clean up an oil spill
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Old Fri, Nov-15-2013, 07:50:48 PM   #5
tmaxx445
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Default Re: Oil Filter Housing - Thermostat?

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Originally Posted by Lawrence1 View Post
Bringing this back from the dead.

i wanted to correct the above poster as i ran across this while searching for normal oil temperatures(just had a cooling system service done and wanted to make sure temperature are where they should be).

The Oil Cooler thermostat is OPEN at start-up, even when the engine is cold. I know this because after reading the above i started my car with the oil cooler disconnected(was doing some front end work and needed to move the car in the garage) and oil immediately started shooting out from the oil cooler lines.

hopefully this will save someone the time to clean up an oil spill
Correct, IIRC the stock valve simply allows 30% of the oil to flow through the cooler regardless of temp. You can buy aftermarket diverter valves to direct all of the oil through the cooler for heavy track only use.







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Old Tue, Apr-07-2015, 04:06:12 AM   #6
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Default Re: Oil Filter Housing - Thermostat?

Bringing up an old thread but i have a situation with my e46 m3 that bothers me. I just installed custom oil cooler (19 row) behind the kidneys with -10AN fittings. Everything seems to be fine but after a startup of the car oil cooler was really cold to touch. I decided to take it for a drive ( temperature was around 190F all the time) after driving for about 40 minutes i checked the oil cooler and it was still really cold to touch...please help
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Old Tue, Apr-07-2015, 04:18:48 AM   #7
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Default Re: Oil Filter Housing - Thermostat?

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Originally Posted by yaro View Post
Bringing up an old thread but i have a situation with my e46 m3 that bothers me. I just installed custom oil cooler (19 row) behind the kidneys with -10AN fittings. Everything seems to be fine but after a startup of the car oil cooler was really cold to touch. I decided to take it for a drive ( temperature was around 190F all the time) after driving for about 40 minutes i checked the oil cooler and it was still really cold to touch...please help
It might be too high, fighting against gravity
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Old Wed, Apr-08-2015, 07:09:45 PM   #8
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Default Re: Oil Filter Housing - Thermostat?

Yes but i think the pressure is so high that it still should go through the cooler easy. Is there an outlet / inlet in the cooler? I got this cooler from Cxracing and its not labeled IN or OUT...
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Discussing Oil Filter Housing - Thermostat? in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)