26-02-2012, 10:41 PM
It's a 1 way check valve for the crank case breather. It's supposed to stop oil flowing out and into your manifold and only let vapours past. Mine didn't work so I just sacked it and fitted a catch tank.
Team Eaton
1999 China Blue 306 GTi6 - Eaton Supercharged - 214.5bhp 181lbft
1999 China Blue 306 GTi6 - Eaton Supercharged - 214.5bhp 181lbft