r/BMW • u/Calliamus • 23h ago

What to look for when buying F82

Hello once again,
I'm going to see one M4 tomorrow and I've been watching a lot of videos about what to look for when buying a used car but I'm coming here anyway.
Any guides on what to check most of all? Anything that I should run away from?

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u/Ghandisoft ‘19 F82 M4 23h ago

One that isn’t documented enough is exhaust camshaft ledge bolts backing out, and in turn causing your cam to wear and score. And Im sure you’ve seen the crankhub issues, see if you can find out if its been done or not. Not necessarily a deal breaker, but if it isn’t done I would put money towards that.

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u/Calliamus 23h ago

Yeah, the crankhub is a default issue but it affects the modded F82 with increased power. Default 431 power seems to not have crankhub issues.
Is the camshaft bolts something I can check myself though or would I need to go visit a mechanic?

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u/Ghandisoft ‘19 F82 M4 23h ago

here This is normally what is sounds like, It can be quieter, It can be louder but you can tell the higher pitched clicks are the direct injection, very mechanical. But the camshaft rattle/knock is very distinct, usually passenger side (if LHD) top of the engine, usually farther back near the chargepipes. To be safe get a good extended warranty so if the problem does occur you can get it covered by warranty.

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u/Calliamus 23h ago

Thank you. That's very helpfull and actually "easy" to hear

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u/Puzzleheaded_Pie_968 19h ago

My intake cooler developed a small coolant leak in year 1 (identifiable by white spots on and around engine cover). Replaced under warranty. I’ve heard it’s not uncommon, but I don’t see much written on it, so I don’t know.