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      08-19-2009, 10:38 AM   #85
boilerdan33
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Drives: 08 E90 335i Steptronic ZSP
Join Date: May 2009
Location: Chicago

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And I respectfully disagree with you, David1 and Alpina. I agree that an oil cooler will help with keeping engine temps down. I haven't found an aftermarket oil cooler that I like yet. (My car came with the factory oil cooler.)

The oil gets hot because it is in contact with hot metal. If you keep the metal cooler by having a better radiator and cooling system, then everything stays cooler. I do not understand why people insist that oil coolers are the best way to keep ENGINE temperatures down. Porsche tried that for 50 years before finally switching over to water cooling. (The 911 was a combination of oil and air cooled.) The best way to keep engine temperatures down is to keep the engine coolant cool. This kit does that by the larger fan, additional radiator, etc. If cooling oil temperatures were the best way to do that, every car on the road would have an oil cooler instead of a coolant system.

I've found that the majority of cars with cooling problems have the 6AT, like I do. Cars with the 6MT do not seem to have as much problem with overheating at the track. (Maybe you have a MT?) The AT and the engine share a cooling system, and I think that the combination of AT, turbos, and beating it on the track raise my temps to the point of having a "soft" engine shut down. The engine is trying to save itself by shutting off the boost.

EDIT: Thank you, High Voltage, for saying exactly what I was thinking, even better than I could say it.
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