Question about Ford F-250
My 2001 Ford f-250 is overheating on me and purging water out the cap. I have replaced the thermostat twice the clutch fan, water pump,and also a new cap. I don't think it is a head gasket because its running fine except for the overheating and it dont use any water until it purges. The weird thing is that I can take the thermostat out and drive it without it overheating, that's why i replaced it a second time i thought the one i got might also be bad so i went to ford a and got a ford replacement. I'm at the end of my rope with it can anyone please help me.
Engine too hot? Try this procedure:
Posted on Apr 25, 2015
Check for cracks in the system. It sounds like you have too much air in it. If you are driving, does the temperature gage fluctuate? The cap is designed not to leak, but hot compressed air will blow by it. When it does, it easily confused as coolant "purging" out of the system, but really it is steam and air. By removing the thermostat, you are fully opening the coolant cycle and the water is free to circulate. Also, with the thermostat removed, the system can't build up enough pressure because it is open to the collector bottle, which in turn is open to the atmosphere. The system is designed to work under pressure so you should keep the thermostat in. That said, try to purge the system. Remove the thermostat, plug the overflow tubes, and pull a low vacuum on the reservoir (collector bottle). You want to make sure the reservoir is about half full. My personal experience is using about 5 to 6 inches of vacuum pressure for about 30 minutes. If there's lots of air, you will see bubbles in the reservoir. And as long as you have enough coolant in it, when you remove the vacuum, it will not draw air into the system, so make sure there's enough coolant in the reservoir. I am not sure about this truck, but some vehicles actually have a purge valve on the main coolant line close to the thermostat, and usually at the highest point in the system. It looks like a Schrader valve. So, if you have this, let the car cool down, put some rags around the purge valve, remove the valve cap and purge away (like letting air out of a tire). You'll have to do this a few time after driving to completely vent the system. Finally, if you do overheat again and start spewing coolant, before the car has a chance to cool down, fill the reservoir with coolant at least up to the hot level mark. That way, when the engine (and coolant) cools down, it will draw the fluid into the radiator. Otherwise, you just end up pulling more air into the system making the problem worse. Hope this helps.
Posted on Feb 12, 2014
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Posted on Jan 02, 2017
SOURCE: 1966 Ford Mustang overheating
try to run the water pump without hoses, and add water in the 'in' side, if is powers out the other side, then it's fine. how is your water/coolant mix?
Posted on Dec 01, 2008
Let the engine cooldown,then open the bleed screw on on the thermostat house,do not remove just loosen----fill water in the radiator bottle slowly and watch for water coming out of the bleed screw----
sometimes the bleed screw is blocked due to anti-freeze-then take the screw off completely ,clean and replace----always make sure the engine is cool
Posted on Jun 15, 2009
I am assuming you have the Northstar engine.
Check for coolant flow at the Purge line,this is a common problem on the Northstar.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.
Are you running it without a thermostat? If so,then strangely enough,this will cause overheating as the Northstar cooling system is different to most conventional systems and therefore will not help you diagnose the problem.
Posted on Aug 22, 2009
SOURCE: overheating on ford bantam
there are three probable causes that may result to overheating one inadequate circulation of coolant within the cooling system. The radiator is clogged with dirt some stems are closed.try to flush the radiator using rad flushing fluid. Second improper bleeding of trap air within the cooling system. Third the water pump blades are worn out inadequate circulation of coolant.
Posted on Feb 02, 2010
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