"O" Rings for radiator cap?

[Joseph~]

Anyone know a part number and or the size of the "O" rings for the radiator cap?

The expansion tank cap on an E30, M20, 1.4 Bar pressure

As I do not see that part in REALOEM.

Thank You

Joseph

[TobyB]

Dear God, just replace the cap! $10!!!

They're supposed to be replaced every 5 years or so anyway... and I HAVE had one
fail, destroying the expansion tank and rad in the process...

t

[efficient]

hahahaha