FREEZE PLUG, ROTOR HOUSING @ INTAKE MANIFOLD
Freeze Plug, Rotor Housing @ Intake Manifold
This is the freeze plug we use to close the OEM water passage from the rotor housing into the intake manifold — when you do do not want to use it.
It measures about 20.5 mm in diameter and the hole in the rotor housing (if it is machined – not all of them are) is about 19.5 mm.
We use some epoxy or silicone around it — we do not want it to leak and we we never plan on taking it out.
We have also tapped the hole and used something around a 1/2″ pipe plug.