Quote:
Originally Posted by mpp9
Bmw added or replaced an oil cooler on the n54 engine after 2007. But either way, they tend to overheat in stock form let alone if youre trying to tune it to its full potential. Thats what.
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I spent a lot of time on the 3 series forums a while back and overheating really wasn't an issue. The HPFP was the big problem over there. Anyway, the upgraded oil cooler was part of the Dinan overpriced package and was not necessary for a tune. A $600 JB3 tune (with or without the cooler) will run mid-low 12's all day long without bolt-on's.