elavated temp water pump?
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elavated temp water pump?
79 f-150 400 eng.running hot changed thermostat, removed thermostat,ran cooler, tested thermostat put in boiling water it's opening up. put thermostat back in properly(not backwards) continues to run hot. rad is good, anybody know if it could be weak waterpump ie. worn impeller, no leaks, anybody out there heard this before?
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Hows you ignition timing? Too advanced or retarded? How's the carb tuning? Too lean?
You say the radiator is good, but how are the fins? Clean? How's the fan blade? Stock or one of those crappy flexfans?
Josh
You say the radiator is good, but how are the fins? Clean? How's the fan blade? Stock or one of those crappy flexfans?
Josh
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Originally Posted by Bullitt390
Hows you ignition timing? Too advanced or retarded? How's the carb tuning? Too lean?
You say the radiator is good, but how are the fins? Clean? How's the fan blade? Stock or one of those crappy flexfans?
Josh
You say the radiator is good, but how are the fins? Clean? How's the fan blade? Stock or one of those crappy flexfans?
Josh
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Well I mean one of those cheap Flex-a-lite flex fans that "supposedly" flatten out as the RPM increases to lessen the drag on the motor. Problem is, they don't move a lot of air to begin with.
Like Mil1ion suggested, how are you determining the engine is running hot? The factory gauge can literally be all over the place.
Josh
Like Mil1ion suggested, how are you determining the engine is running hot? The factory gauge can literally be all over the place.
Josh
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i don't know 100%, but without thermostat in gauge goes from hot to much cooler,also when thermostat in, bottom rad hose cool, top hose i can collapse with my bare hand. i've changed sending unit also. same results.
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From: Albuquerque
Water pump problems usually involve leaking and squealing. What fan do you have? Clutch fans can lose the silicone and slip. You need a shroud for sure.
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stock fan and shroud, i don't get to much hot air out of cab heater just warm, heater core not leaking.
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Always run with a T-stat....these engines were made to run at 200*F
If it runs too cool that causes extra wear.
If you are going by the gauge..that's the problem.You need to verify the exact temp
with a thermometer
Is the sending unit for a gauge or for a warning light ? There were 2 types.
If it runs too cool that causes extra wear.
If you are going by the gauge..that's the problem.You need to verify the exact temp
with a thermometer
Is the sending unit for a gauge or for a warning light ? There were 2 types.
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guage type, yes they do run hot, i'm up in canada, the weather is cold,when summer comes then i tow 20' travel trailer so i can't have heating issues. i should likely be ok till then as it hasn't completly overheated yet.
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I have a 195*F T-stat in my engines year round.
The needle doesn't go over the M in normal no matter what ...even pulling my 22 1/2" Trailer thru the Rogers pass or "The Coq" on my way to Vancouver.
You say the engine is overheating but your heater isn't putting out.
Do the Candy Thermometer in the coolant thing.
also check it at idle then again at 1000 rpm
The needle doesn't go over the M in normal no matter what ...even pulling my 22 1/2" Trailer thru the Rogers pass or "The Coq" on my way to Vancouver.
You say the engine is overheating but your heater isn't putting out.
Do the Candy Thermometer in the coolant thing.
also check it at idle then again at 1000 rpm
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i did the thermomiter test ended up about 200 deg. so i guess it will just run hot,i wonder now if the block is restricted with crud from previous people putting in rad seal ect.also it had sat for a while. only way to know for sure is to pop out a frost plug and see what kind of crap is in block, i changed a frost plug on an older ford before and i couldn't believe what came out, thick gobs of greasy stuff.
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We sorta did ours with a flush like that. Only we decided to replace the factory waterpump. (Hey..it is a 1975 360 factory pump....) Some of that crud that came out of the waterpump ports on the block? Ewwwwwwww... Brown and crusty bits and even a few chunks/flakes.
If someone used sealer? I've actually seen that stuff turn into major chunks in radiators. Not talking about the silver solder seal stuff that looks like small metal flakes---the stuff that looks like a can of baked beans that supposedly won't do 'any harm'... That stuff plugged up several heater cores on our customers cars and trucks--and bunged up any smaller passageways it could find.
Of course that's just my opinion...your mileage may vary.
S-
If someone used sealer? I've actually seen that stuff turn into major chunks in radiators. Not talking about the silver solder seal stuff that looks like small metal flakes---the stuff that looks like a can of baked beans that supposedly won't do 'any harm'... That stuff plugged up several heater cores on our customers cars and trucks--and bunged up any smaller passageways it could find.
Of course that's just my opinion...your mileage may vary.
S-