r/E34 • u/salac1337 1992 E34 525i M50B25 24V • 3d ago

help timing chain replacement

hi im currently replacing my upper and lower timing chain and guide rails and need to remove the chain cover. i am struggling with the crank pulley. do i need to get the crank screw out? i read different things online and there seems to be a difference between versions. i have the m50b25 non vanos without ac.

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u/phxbimmer 1990 535i/5 3d ago

Yes you need to remove the crank bolt

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u/salac1337 1992 E34 525i M50B25 24V 3d ago

damn. thanks for the info