Over heating on a 223 6cyc
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Over heating on a 223 6cyc
Hey, I have been restoring a 54 f-250 and the engine keeps over heating. I have redone the radaitor core, took out the thermo stat, rebuild the water pump. After I drive it the antifreeze backs up and comes out of the discharge hose. What could it be?
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Hey, No this has been going on for awhile. Is there some way to check to see if the radiator is not right. I took it back the guy he said it was fine. It just seems that the water is not flowing right. I would let it run with out the cap and never had a flow. The truck did set in the barn for over 15 years could the ports inside the engine be clog somehow?
Fleet Owner
Joined: Jul 2004
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From: NM
I'd be surprised if the passages in the engine are actually plugged, but those in the radiator could be full of junk. Have you done a two-step flush and fill (using acid cleaner and a neutralizer)? Anything that's sat that long needs to be thoroughly cleaned or it will have problems.
It could also have a head gasket leak, with the cap off and the engine running, do you see bubbles in the flow coming back to the header tank?
Last but not least, are you overfilling it? The normal cold fill level is about an inch and a half below the fill inlet. If you fill it to the top, it will spit that much right out.
It could also have a head gasket leak, with the cap off and the engine running, do you see bubbles in the flow coming back to the header tank?
Last but not least, are you overfilling it? The normal cold fill level is about an inch and a half below the fill inlet. If you fill it to the top, it will spit that much right out.
Roast em' if you got 'em
Joined: Mar 2005
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From: Rio Rancho, NM
I agree with Ross, put the thermostat back in! (well, make sure its good) if in doubt, replace it (they're cheap)
I doubt that the block would be so pluged up to restrict coolant flow without showing other signs of damage (expansion plugs rotted through, etc).
It would be easy enough to get a rough idea of radiator flow, take the hoses off and see what runs out. Heck, for that matter you could do the same with the block. With the thermostat out stuff the hose in it and see what you get coming out.
did you rebuild the water pump or put another one on there? Are the little blades still on the pump?
Bobby
I doubt that the block would be so pluged up to restrict coolant flow without showing other signs of damage (expansion plugs rotted through, etc).
It would be easy enough to get a rough idea of radiator flow, take the hoses off and see what runs out. Heck, for that matter you could do the same with the block. With the thermostat out stuff the hose in it and see what you get coming out.
did you rebuild the water pump or put another one on there? Are the little blades still on the pump?
Bobby
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The normal cold fill level is about an inch and a half below the fill inlet. If you fill it to the top, it will spit that much right out.
Scott
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Yes the water pump was rebulied, I put a new heater sending unit in, and the radaitor has a new core. Show I buy something that will ckeck and see what the temp is? The gauge reads hot, could it be bad? You might be right about the water level. When I took out the thermostat I filled it to the top? Hell maybe nothing wroung with it.
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Could I run the motor with a water hose stuff in the top and see how it comes out?. Our does it run from bottom to top
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Greetings. You should check the coolant temperature. I have an aftermarket temp guage and it never goes over 145 degrees. You may have a sender to guage mismatch, they are not working together. 54 F-100 223-6cylinder
MrBlue
MrBlue
Roast em' if you got 'em
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From: Rio Rancho, NM
I would definately check the temp with another guage. It is not uncommon to have a guage that is off.
Coolant flows from the top down in a radiator, you could definatley disconnect the upper radiator hose at the radiator and run the engine. The water pump should push water out of the upper hose once the thermostat opens up.
Bobby
Coolant flows from the top down in a radiator, you could definatley disconnect the upper radiator hose at the radiator and run the engine. The water pump should push water out of the upper hose once the thermostat opens up.
Bobby
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From: Augusta, ME
That's what I did to check my stock gauge on my '51. I had a nice new old stock gauge but the engine was "overheating" per the gauge. I siphoned out an inch or so of antifreeze from the radiator and dropped in the bulb end of an aftermarket gauge, and got the motor warmed up. The dash gauge was on the last notch before the letter H, but the gauge in the radiator was at 167. I took the dash gauge and started looking at it and turns out there are two holes on the back side to calibrate the gauge.
Scott
Scott
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