Coolant Catch Can

[ceegeezM3]

This is something I haven't seen yet...
How/where does a coolant catch can attach? CR rules require it, but I can't seem to find out anything more than that.

I'm thinking it's not necessary since the E36 has one built in already.

[onrailsm3]

http://www.jegs.com/cgi-bin/ncommerc...61&cgrfnbr=565
There are a few styles.


The super deluxo catch can, $26 and change.

[Steve J.]

This is mine: Sorry for the bad angle, I did not take this picture.

[simonh]

If it has one already don't worry about it, on my E30 m3 there is a hose that is the overflow hose and it basically dumps straight to the ground. I just tie wrapped a plastic coke bottle in place as the "catch can".

[ceegeezM3]

Thanks for the pictures. I know what they look like, but I guess my question is do you NEED one on a stock E36 radiator, since it's a closed system and already has the expansion tank built into the radiator. I don't see where you would put one.

I can see where it would be necessary if you had a racing radiator that just vented onto the ground, but the stock radiator doesn't do that.... does it?