Cooling system question

[riotwarrior]

The thermostat is the orginal one that came with the engine, I have a extra fan clutch that I will change out today to see if that helps.

Try IDIabuse idea before any wrenches get turned......if your lower rad hose has no spring or its eatan away or or or ...regardless of or..if YOU CAN squeeze it down this is a good place to start at....a collapsed hose can and will cause issues as described...

I have a funny feeling that the problem is the fan clutch because i cant hear the fan come on and off while driving

you can have an itch, a funny feeling a tick what ever you want but until you can quantify the temperature you are actually running at you cannot speak to fan kicking in or not. I run in 40C weather in summer and my fan rarely comes on! Now it doesn't at all... the point is you have no definitive data to know whats going on. Get a real gauge and then we can talk once those #'s are in!

Squeeze your lower radiator hose by hand, if you can squeeze it shut, you can be sure it will suck closed at hwy speeds causing over heating and possible piston failure.
Javier

Thanks for this Tip Javier! good on ya for thinking this one

 

[stumiister]

The lower hose has a spring in it to prevent that from happening

 

[idiabuse]

The lower hose has a spring in it to prevent that from happening

good deal then! What is the ratio you used when installing the newer radiator? 50%/water 50% coolant?

Also check the radiator core for clogging, rub your hand over the core after a warmup and engine shutdown, search for cool spots on the radiator, that is a sign of a internal clog.


Javier

 

[stumiister]

yes it was 50/50

 

[stumiister]

I have the hood up right now to change the fan clutch which is done, started the engine and moved the throttle liknage by hand with the engine running and noticed the upper raditor hose collapsing on itself while the engine is at high rpm, what can I do about this?

 

[icanfixall]

Not much you can do for that. My feelings are is not normal looking but some rigs will do that. The odd part is this happens when the radiater can't flow as much as the pump can push thru the system... But the system is a closed system so this should not be happening. I'm thinking you may have some trapped air in the system too. I know you just replaced ALL of the freeze plugs.. Even those behind the flywheel. So dropping out all the coolant. And then refilling it could leave some air trapped in the system. Might want to open up the thermostst housing and look at whats going on there...

 

[stumiister]

Im going tochange the thermostat tomorrow

 

[FORDF250HDXLT]

I have the hood up right now to change the fan clutch which is done, started the engine and moved the throttle liknage by hand with the engine running and noticed the upper raditor hose collapsing on itself while the engine is at high rpm, what can I do about this?

make sure your cap is working and the overflow line isn't plugged.if you need a new cap,get 13 lb.

 

[stumiister]

I did notoice after drive for about 10 miles I turned off the heater and the engine temp came down to where I think it should be, what would cause a truck to be overheating if the heater is on?

 

[stumiister]

Is it possible that I have the heater hoses on backwards? doe anyone know the correct coolant flow from the engine to the heater?

 

[icanfixall]

Is it possible that I have the heater hoses on backwards? doe anyone know the correct coolant flow from the engine to the heater?

On my heater the line from the head flows into the drivers side port to the heater and then the passenger side flows out and into the water pump.

 

[stumiister]

Gary I checked the hoses on my truck, they are connected as you described

 

[stumiister]

I got a theermostat from NAPA this morning Im going to install it today, the last 6 miles to work I turned on the blower motor for the heat the engine showed the temp getting hotter so I drove a few miles and turned it off, then i saw the temp come down, why would the temp increase if the blower motor is on? I thought it would be the oppisite? with the blower motor on it would cool the water down some?

 

[kc0stp]

With a heater core flow direction doesnt matter so long as their hooked into the engine at the correct points (including all t'ees) that said a heater core is also basiclly a mini radiator and in our trucks recivies constant coolant flow with or without heater on so Im not seeing how that could raise the coolant temp personally...

 

[stumiister]

Kc0stp I know the coolant flows in one end and out the other and it doesnt matter if the blower is on or off the engine temp should be the same no matter what maybe even alittle cooler with the blower on maybe the guage itself is acting wierd because he blower is on like a increase in either voltage or amps just enough to change the guage temp?