Quote:
Originally Posted by nicknaz
1m /335is radiator fan is a plug and play part. This poster claimed ~15F idle temp reduction and mentions anecdotes it helps for track use also.
http://www.e90post.com/forums/showthread.php?t=591900
I wonder if that fan plus lower temp thermostat (maybe from m3?)or the thermostat bypass would solve e89 oil temp issues for far lower cost without having to go with aftermarket $$$ oil cooler kit |
Nice find! I assume we'd need a Z4 35is radiator fan? Or are they all the same in the 1M/335is/135is/Z4 35is?
Also, bear in mind that downpipes usually reduce oil temps. The stock cats trap a lot of heat in the engine bay/turbos and contribute to higher water and oil temps. Catless or HFC downpipes would vent that heat better. Perhaps not significant by itself, but combined with a fan and some modulations to the factory oil cooler, it might go a long way.