Someone forgot to do a timing belt change

[AwakenNoMore]

Had the same problem early this year, I just grabbed another head from the junkyard, had it machined, lapped the valve seats and reassembled. Totally worth it.

[LagunaSecaBlue]

I just put it all together. Will be firing it off soon.

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[Cabriolet]

make sure you bleed it correctly.
heater on
front wheels 1ft higher than rear
fill coolant let the car get to temp and open/close the bleeder until it stops bubbling. at this time the upper rad hose will get firm and you will get through in the cabin. i usually check my car a week later change the oil and rebleed as a just in case.
use only distilled water and bmw coolant.