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09-11-2011, 10:12 AM
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Liquir up Front, Poker in
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Join Date: Oct 2010
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Heater control valve leaking again, too much pressure?
One again Im leaking antifreeze from that stupid arm on the heater control valve. Its only been on a few months, the last one blew up and sprayed antifreeze everywhere.
Im lost on whats causing this, is there anyway to figure out why these keep going so fast and what may be causing it?
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2003 Ford Ranger Regular Cab 2WD
Modified Air Intake , 17 Inch Wheels , Custom Interior, Custom Ford Emblems, Black Headlight Covers, Tinted Euro Tailights, Tinted Third Brake Light, Purple Underglow, Engine Dress Up (In progress), Air Box Mod Sony XPLod Subs/Amps, Aux Lights, Hand Made Grille Inserts, Playing Card Vinyl, LineX Bed Liner, Some undercoating (in progress), Dual Exhaust
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09-11-2011, 08:48 PM
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Junkyard Dog
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Join Date: Sep 2010
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Re: Heater control valve leaking again, too much pressure?
Newport, huh? Not too far from me.
Do you have the 4 port or 2 port design? Also can you show a pic of the problem area? Which engine do you have?
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09-12-2011, 05:41 AM
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Liquir up Front, Poker in
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Re: Heater control valve leaking again, too much pressure?
2.3l, 4 port
Its leaking from the arm that controls the valve inside by vacuum. This is my fourth one. Last one was less than 1k miles old and previous one snapped and spewed coolant.
I have a p2004 thats prob unrelated (all hoses seem good and whatnot) thats causing imrc ticking.
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2003 Ford Ranger Regular Cab 2WD
Modified Air Intake , 17 Inch Wheels , Custom Interior, Custom Ford Emblems, Black Headlight Covers, Tinted Euro Tailights, Tinted Third Brake Light, Purple Underglow, Engine Dress Up (In progress), Air Box Mod Sony XPLod Subs/Amps, Aux Lights, Hand Made Grille Inserts, Playing Card Vinyl, LineX Bed Liner, Some undercoating (in progress), Dual Exhaust
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09-12-2011, 06:12 AM
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Blinded by the light
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Join Date: Sep 2009
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Re: Heater control valve leaking again, too much pressure?
Well my guess as to whats causing the failure is the system being over-pressurized.
First things first, replace the radiator cap. The cap is a pressure relief valve. Once pressure exceeds ~14psi, it will open and vent coolant into the tank. If the cap is not opening to vent excess pressure, it has to go somewhere and the weakest link will fail first. Which is probably that valve. This could explain why pressure isn't venting like it should be.
Now, second problem is WHY is the pressure increasing above normal like this? At the normal operating temperature range, pressure should hold steady around 8-12psi or so I think. Well below the cap's release point and way way below where components start to fail. What is the temp gauge on the dash showing while you're out driving around?
The bad news is that if the temperature is in the normal range, excessive pressure can only come from one place... a head gasket leak. Cylinder compression is leaking into the cooling passages and adding excessive amounts of pressure to the system. If the radiator cap is bad, this will let it vent the excess pressure the right way instead of breaking shit. And when it vents, you'll see a lot of air bubbles int the reserve tank.
I agree the P2004 code is probably unrelated. Its for an Intake Manifold Runner Valve fault. Something that does need attention but I can't think of anything that would relate it.
Last edited by FireRanger; 09-12-2011 at 06:18 AM.
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09-28-2013, 06:03 PM
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Learning to use the forums
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Join Date: Sep 2013
Posts: 1
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Re: Heater control valve leaking again, too much pressure?
Also try using the older style 4 port valve that isn't all plastic. They sell them on ebay, they seem to hold up a lot better! [http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=190825133394&ssPageNam e=STRK:MESE:IT[/URL]
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09-29-2013, 01:57 AM
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Road Trippin' King!
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Join Date: Nov 2009
Posts: 5,007
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Re: Heater control valve leaking again, too much pressure?
Quote:
Originally Posted by FireRanger
Well my guess as to whats causing the failure is the system being over-pressurized.
First things first, replace the radiator cap. The cap is a pressure relief valve. Once pressure exceeds ~14psi, it will open and vent coolant into the tank. If the cap is not opening to vent excess pressure, it has to go somewhere and the weakest link will fail first. Which is probably that valve. This could explain why pressure isn't venting like it should be.
Now, second problem is WHY is the pressure increasing above normal like this? At the normal operating temperature range, pressure should hold steady around 8-12psi or so I think. Well below the cap's release point and way way below where components start to fail. What is the temp gauge on the dash showing while you're out driving around?
The bad news is that if the temperature is in the normal range, excessive pressure can only come from one place... a head gasket leak. Cylinder compression is leaking into the cooling passages and adding excessive amounts of pressure to the system. If the radiator cap is bad, this will let it vent the excess pressure the right way instead of breaking shit. And when it vents, you'll see a lot of air bubbles int the reserve tank.
I agree the P2004 code is probably unrelated. Its for an Intake Manifold Runner Valve fault. Something that does need attention but I can't think of anything that would relate it.
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What he said
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