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Originally Posted by AV8R4AA
Boy-O-boy, sure a lot of discussions on that topic.
Let’s talk about Roe vs. Wade instead….
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Well said. This is a rabbit hole to be sure.
M62 runs at 221 deg at the engine outlet so yours is working as intended. Mine is plus or minus a few degrees of that always. Except of course when it sheds a belt or blows a hose that I’ve installed incorrectly. Then it gets very hot, very fast.
I’d read everything you can find about cooler thermostats on the M62 family on this site and bimmerforums to be sure, before doing it. The 540 guys over there beat the crap out of each other over this mod.
The radiator outlet on my car can be anywhere from 120 or so, up to 180 or higher depending on how hard I’m driving, outside temp and if the AC is on. I’ve worried about the higher temps. Hot for sure, but I’m currently of the mind that BMW knows best in this case of this system. Frankly I think better money and results could be spent on a custom high efficiency radiator set up to enable more cooling capability than the crappy plastic sided OE piece. Unfortunately none exist it seems.
I’ve thought about installing a full electric puller fan to replace the clutch version, but can’t come up with a compelling reason aside from the fact that it would be a fun project. Plenty of guys do this mod with good results. Maybe when I’m done with other more pressing needs on the car.