|
That valve is at the end of the oil separator and forces air to be drawn into the beginning of the separator while allowing oil to drain back into the crankcase at the end. Without it, the oil will still drain just fine but some oily air will be drawn into that passage, bypassing the oil separator. The net result is that you will have significantly faster carbon buildup on your intake valves. It won't damage anything, but you'll probably want to clean your valves every 30K instead of 100K miles.
|