RCM Catch Tank GC8
 

Evening chaps,

Fitting the RCM catch tank and just checking the fitment

It's got 3 smaller inlets: both heads and crank case.

It has the return to sump at the bottom, all quite easy

The bit I'm confused with is there is a larger inlet the opposite end to the smaller ones, where do this connection to? VAC under the throttle body?

http://www.advancedautomotives.com/r...-v6-1102-p.asp

This is the kit I'm fitting, the inlet I'm talking about is directly above the threaded return to sump fitting

Vent to atmosphere I would think..

Is it 16mm or larger?

Could be a breather but if it's 16mm it could be for the crank case breather.