Does anyone know if that 5/16 dia. heater circuit flow connector that is specified in Coyote coolant system diagram is only for filling and purging?
Background: I plumbed my heater circuit per the instructions, but couldn’t get the heater to work until I plugged the “H” connector. The Vintage Air heater control valve I have is either open or closed when the car is on and the heater is off. So per the Coyote instructions, you need the heater supply and return ports to be connected to purge air from the RH head. So I designed this aluminum block with the 5/16 cross hole but when it was opened, no coolant was getting to the heater. The system was filled and vacuum purged, so it wasn’t an air trap.
Should I buy this upgraded Thermotion heater control valve that FFR seems to now be using?
Heater bypass cross hole.JPG Coyote heater circuit.JPG updated heater control valve flow.jpg updated heater control valve PN.jpg coolant system note.JPG