White Glove PCV Test

Made From a Spare Oil Cap

The object is to see at a glance whether the PCV (flame trap) system is keeping up with the cylinder blow by.

Sure, you could just use your hand to hold a glove over the cam cover opening. Suppose it is working well; the glove might be sucked in.

This #43 drill is about the same size as the orifice on the manifold for idle vacuum supply to the flame trap.