What is a Monovalve and how do i know if my car has it?

94 Dodge Ram Van 250





How do i know its bad?


What would be the symptoms?
What is a Monovalve and how do i know if my car has it?
You are probably referring to the heater control valve that is typically located at the rear of the engine just next to the firewall. It controls the flow of coolant into the heater core that is located up under the dash inside the van.





If it was bad it would probably be either leaking coolant (antifreeze) and/or failing to regulate the flow of coolant. So, your symptoms would be either coolant that has leaked out onto the ground and/or not being able to get heat inside the vehicle.





The one for a 94 Dodge Ram 250 (figuring you had a 5.2L V-8), would cost about $20 at your local auto parts store. Being that it's a van, it's probably a little difficult to get to, so figure about 45-60 minutes to complete the repair.