Quote:
Originally Posted by nicknaz
One other factor depending on how you expect to use the car is the cooling system. I took my Z4 35i (2012, sport package, DCT) into the mountains on Sunday for a nice drive and it felt like the car was pulling timing.  Indicated oil temps were ~270F and it was 93F outside
I thought about the extra cooling when choosing between 35is and 35i and figured to save the $ and get the 35i since the Z is my daily and not a track car but it is unfortunate how easy it is to overwhelm the stock cooling system. |
Quote:
Originally Posted by HerrK
270F is not normal for 93F ambient conditions. The pulling timing feeling is probably due to some other malfunctioning condition. I've never seen over 255F running in 110+F ambient. Retarded timing can also lead to the higher temps you described as well as that lost power feeling as the engine is not operating efficiently. Might be good timing for an appointment with the dealer.
There are no different parts - radiator or oil cooler for an i or is. MT vehicles get a different radiator for obvious reasons.
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@nicknaz
++1 to everything HerrK said.
Not sure how hard you were pushing you Z, but 270f is too high for 93f. That not really a hot day. Could be an elevation, thinner air/altitude issue, but if I'm not mistaken, the mountains in the San Diego area are 2-3,000 thousand feet max, right? That should not present a problem.