catch can

[DRFTR86]

can somebody please tell me where the pcv valve is, ive set up a catch can, with one pipe from the vac line in the inlet manifold, and the other from the outlet pipe on the rocker cover, where is the pcv valve, how does the air get into the engines oil galleries, bcos when the car is warm, it whistles???, i will post pics of the set up 2nite

[DRFTR86]

here is the setup, but only i have black heater hosing as the piping, other than that, it is the same, where is the pcv valve

http://img443.imageshack.us/my.php?image=sprinter1rl7.jpg