Over Heating Need Help QUICK!!!!!!!
Fleet Mechanic
Joined: Aug 2003
Posts: 1,546
Likes: 46
From: Kemmerer, Wyoming
Head gaskets really aren't that hard to do yourself if you got a Chilton manual and a torque wrench.
Head gaskets huh? Did you happen to notice any oil in your water before you drained it? Is there water in your oil? From what you've described, I wouldn't jump to a head gasket so soon whithout more evidence.
Head gaskets huh? Did you happen to notice any oil in your water before you drained it? Is there water in your oil? From what you've described, I wouldn't jump to a head gasket so soon whithout more evidence.
Fleet Mechanic
Joined: Aug 2003
Posts: 1,546
Likes: 46
From: Kemmerer, Wyoming
Originally Posted by EaTmYtAiLpIpEs
well I had a ford mechanic tell me this so.
I have never seen a bad head gasket cause the symptoms you are describing. If you are losing that much water through the head gasket then you should plainly see other signs... i.e. water in the oil, oil in the water, water coming out of the tailpipe.
Bad head gaskets, by themselves, do not cause a loss of heat coming out of your heater. I still think you have air trapped in the system. Did you burp it correctly?
Elder User
Joined: Jan 2007
Posts: 501
Likes: 0
you can have a blown headgasket do that. if there is a real small hole it will leak when it is sitting. when it is running it is pumping air into the coolant system. fill your coolant jug all the way up and run the truck. if you see air bubbles and they do not stop then you have a blown head gasket. you can also put a coolant system tester on it, pump it up and let it sit for a couple of hours. if your pressure drops then you would have a blown head gasket. (if there are no exteral leaks) the reason it is missing when you first start it up is because coolant is leaking into one or more of the cylinders. if you are getting a check engine light then it should tell you which cylinder is missing. then you know which gasket to replace. if you leave the pressure tester on overnight, when you start it i bet you will get a big cloud of smoke out the tailpipe.
Last edited by elmo8641; Nov 8, 2007 at 07:19 PM.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 784
From: Simi Valley, CA
No hot air from the heater? One of the usual causes: The inline "Heater Vacuum Control Water Valve" is defective (very common). It's spliced into the heater hose either behind the engine, or along the right fender apron. The valve is metal/plastic and has a nipple for a vacuum line on it. When the valve fails to open, no hot water can reach the heater core.
The same POS valve has been used snce 1974.
D4AZ-18495-A .. Heater Vacuum Control Water Valve (Motorcraft YG-136).
It's readily available from your Ford dealer. After all...it's been a "best seller" since day one.
The same POS valve has been used snce 1974.
D4AZ-18495-A .. Heater Vacuum Control Water Valve (Motorcraft YG-136).
It's readily available from your Ford dealer. After all...it's been a "best seller" since day one.
Last edited by NumberDummy; Nov 9, 2007 at 01:46 AM.
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Senior User
Joined: May 2007
Posts: 420
Likes: 0
From: Amsterdam, NY
Alright I will check it out and most likely buy one. If it don't work sunday night it is going to the mechanic for $650 to get it fixed. I will crap myself if the block ends up being cracked or something.
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FTE Leadership Emeritus
Joined: Jul 2002
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From: Long Island USA
Originally Posted by elmo8641
you can also put a coolant system tester on it, pump it up and let it sit for a couple of hours. if your pressure drops then you would have a blown head gasket.
But losing the heat with it in gear doesn't point at a head gasket.
Vacuum leak? Closing the vacuum-operated valve that Bill (NumberDummy) posted about, when the vacuum gets low from putting it in gear?
Weird...
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
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From: Stephensville WI
A head gasket failure would cause some coolant to migrate to the oil. Place a drop of oil on the hot exhaust manifold. If it doesn't sizzle, you probably don't have a bad head gasket.
Elder User
Joined: Jan 2007
Posts: 501
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you will only see oil and water mix if there is a break between them. the reason the heat comes and goes is because the air that is being pumped into the coolant system is getting into the heater core. i am a mechanic (honda) and see this all the time with honda's.
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Senior User
Joined: May 2007
Posts: 420
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From: Amsterdam, NY
Got it back on sunday night. Runs like a dream. No more noises on startup. Runs good and really smooth. I have a hole on the right exhaust manifold on the inside. I am gonna get a manifold and put it on there so it wil run brand new. Do the body and it will be like a show room truck on the outside.
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