Purge Control Valve
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Junior User
Joined: Apr 2007
Posts: 62
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From: St. Amant, Louisiana
Purge Control Valve
My radiator has been losing water at an increasing rate. Radiator is fine, no water in oil (whew) no leaks there. I found a hose slowly dripping water from my purge control valve. From what I understand, the valve is used on the 300 straight 6 cyl. I have a 302 block that (from what i understand) does not require such valve. Three of the lines lead to nowhere coming from the valve, but one line is my fuel return line.
Water/antifreeze spot is on the passenger side of the valve directly under one f the hoses.
What exactly does this thing do?
If it is leaking water from there, any fixes?
Can it be anything else?
Thanks yall, yall have helped me so much in the past
HELP!!!
- Jones
Water/antifreeze spot is on the passenger side of the valve directly under one f the hoses.
What exactly does this thing do?
If it is leaking water from there, any fixes?
Can it be anything else?
Thanks yall, yall have helped me so much in the past
HELP!!!
- Jones
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
The only purge control valve I'm aware of is the one on top of the charcoal cannister, which is part of the evaporative emissions system and is completely isolated from the cooling system. In other words, they have nothing to do with each other (other than a ported vacuum switch that uses coolant temperature to shut off the vacuum signal to the valve). Whatever the case, are you saying you had an open hose that was just dripping water? There should be no open hoses in this system, otherwise it defeats the purpose. The only open hose you should have on the truck is the radiator overflow hose, if you don't have a coolant overflow tank.
If you're losing water, you're either burning it, leaking it, or it's going somewhere else in the engine. You need to try very hard to find where.
If you're losing water, you're either burning it, leaking it, or it's going somewhere else in the engine. You need to try very hard to find where.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 784
From: Simi Valley, CA
As noted above, there is no such thing as a "purge valve" used anywhere in the cooling system.
Check the: waterpump, heater hoses, heater core.
If the heater core is leaking, there is usually moisture on the passenger side of the floor inside the cab.
One or more of the freeze plugs could be leaking coolant.
Check the: waterpump, heater hoses, heater core.
If the heater core is leaking, there is usually moisture on the passenger side of the floor inside the cab.
One or more of the freeze plugs could be leaking coolant.
