Question about Cars & Trucks
My ford F-250 is overheating, i have changed everything in the system the i know of that could be causing the problem. I just wonder if I might have air in the system from changing the water pump and thermostat. The problem i have is that i cant seem to locate a bleeder valve, its not on or around the thermostat housing or by the tank fill up. I'm sure there has to be a way to get the air out of the system. Any ideas on where to find the bleeder valve or how else i can get the air out of the system. Any help would be helpful, I at the end of my rope with it, i'v been almost 2 months trying to get it stopped.
When you fill the system make sure the heater is turned on. An aftermarket hose coupler with a backflush kit can be inserted in the heater line. Or with the engine cold, disconnect the rear heater core hose from the intake and fill the heater hose as the high point in the system.
Another possibility is if you have a Radiator electric cooling fan. Water cooling is not adequate. Your electric cooling may not be turning on or may be missing high speed.
Bad head gasket. Aeration coming from a leaking cylinder can force hot compression gases into the cooling system. This will disrupt water flow and put hot exhaust gases into the water system.
Posted on Feb 12, 2014
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Posted on Jan 02, 2017
That is a bleeder, but if you can't get it loose, just start engine with cap off & watch flow, and let air bleed out through top. I usually let coolant circulate through 2 or 3 cycles before I put cap back on. By cycles I mean, when cold, remove cap,start car, TURN HEATER ON, and let it run until it's up to running temperature, then pay attention to temperature gauge, and flow in radiator. When at normal running temperature, you'll eventually see the flow increase in your rad when thermostat opens, and shortly therafter your rad fan will probably start to cool the incoming coolant. Watch for bubbles when flow increases, which is the air bleeding out of the system. Let it do that about 3 times before you put cap on, then take it for a short drive, come back, shut it off and let it sit & cool down again. You may get coolant returning to bottle but that's normal. If your getting excessive or continuous bubbling from rad, it may be indicating a bad head gasket or head, but lets not go there yet.One other thing to try, is if you go for a drive and it starts to heat up, turn your heater on high heat & high fan setting, and see if gauge goes down. If that makes it run cooler, your probaly looking at a new rad.
Posted on Oct 26, 2008
Testimonial: "Information very helpful, ultimatly the engine overheated and died. Once again this chrysler 2.7 6 cyl engine lived up to its nickname! Sludge!"
the thermostat can be easily changed from up top, the T-stat is located at the engine end of the upper radiator hose under the flange the hose connects to. Make sure u follow manufacturer's cooling system bleeding procedures when you refill after the T-stat is changed out.
Posted on Jun 14, 2009
We have had that problem here at my repair shop, that's a sign of blown head gasket, also try filling it with the engine off, till coolant come's out of bleeder.
Posted on Sep 10, 2010
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