Question about 1991 Ford F250

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I have a 1991 f250 with a 460 engine and no heat i have backflushed, changed the thermo, ran cooling cleaner repalced all hoses still no heat the heat side is hot the outlet is warm the control lever works the door fine any sugs

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

  • 118 Answers

SOURCE: i have a 1998 ford f-150 and no heat. i have

You just might have an air lock. Try bleeding the system from the heater hose at the firewall. Losen one hose a little, and at operating temp. open slightly to let air out. You will lose some coolant, but just refill the rad. Now, both hoses should get hot.

Posted on Jan 01, 2010

SOURCE: 1985 f250 with a 460 gas motor blows blue/white

Blue --is Oil
White- is Coolant

Bad intake gasket or head basket

Posted on May 04, 2010

Dak408
  • 277 Answers

SOURCE: I need the serpentine belt

here you go hope this helps
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Posted on Oct 17, 2010

  • 1796 Answers

SOURCE: I have a 2001 Ford Explorer Sport with a heater

Hi!!
If your blend door actuator (HOT - COLD) control works, you probably have a clog in the heater core. Both hoses should be almost at the same temperature, it only takes coolant a few seconds to go thru the Heater core. Remove the outlet hose of the Heater core at the engine intake, plug intake using a piece of hose squeeze shut, route the hose downward into a container placed under vehicle to collect engine coolant, turn heater all the way up and start engine for a couple of seconds. This may unplug the heater core or at least will let you know if it is clogged. If you need to do this more than twice to clear heater core, make sure the coolant is refilled.
Good Luck! Keep me posted!

Posted on Dec 13, 2010

  • 52 Answers

SOURCE: 2000 ford expedition 5.4 heat is cold. When heat

if the heater hoses are hot the only thing it could be is a blend door, if you can hear the door moving its not closing all the way, those are made of plastic and are common to brake at the actuator you will hear the actuator work but it will only partially close and open the door

Posted on Dec 20, 2010

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2 Answers

I have a 2004 chevy trail blazer it wont heat very well only luke warm air I have changed the fan thermostat and water pump


Possible plugged heater core. Check heater hoses when engine at operating temperature. Both hoses should be close to the same temperature. If one hot and one warm/cold, suspect a plugged heater core. A backflush will be required to correct the problem if it is plugged

Jan 05, 2016 | 2004 Chevrolet TrailBlazer

2 Answers

Over heating


usually overheating problem arises from radiator plz flush the radiator with the radiator cleaner available in the market with directons available. usually you shake the cleaner open the cap and pour the full content into the radiator and drive for few hours. leave it to cool and rince with fresh water a couple of times till the cleaner is totally removed.
also wash with high pressure water the fins of the radiator as it gets choked from flies and insects.
pour fresh coolant in the radiatorthe
the other reason for this heating could be faulty thermostat located at the lower portion of radiator which restarts the when the engine hear exceed the prescribed temperature and it ***** dow automatically when cools. it goes on.
WARNING:- RADIATOR FAN CAN START ANY TIME SO PLEASE KEEP YOUR HANDS AWAY FROM THEM AS THEY CAN SLICE YOUR FINGERS COMPLETELY.
other problem you can view is when the engine is cool and the radiator is cool open the radiator cap and then run the engine to see if air bubbles are visible- coming inside the radiator. if that is the case then you have to go to the workshop and get the engine overhead gasket replaced.
other problem could be traced like when you come home after a drive check all the wheels if any of them are heated up excessively they could heat like an electric iron so be careful if that is the case then get your brakes overhauled.
ecsessive gas charged in car ac will also heat the car.

Aug 29, 2012 | 1998 Holden VT Commodore

1 Answer

96 TOYOTA TACOMA 2.7 ...HAVE REPALCED THERMOSTAT 3 DIFFERNT TIMES CHECKED HOSES KEEPS KICKING CODE INSUFICENET COOLANT TEMPETURE LOWER LOOP... WATER PUMP DOESN'T LEAK OR MAKE NOISE BUT COOLANT DOESN'T...


If it weren't for you saying lower hose is cool, it would be a bad coolant temperature sensor. But it sounds like you have at least a very big air pocket in engine or the impeller on waterpump isn't turning.

Mar 21, 2011 | Toyota Tacoma Cars & Trucks

1 Answer

How to change a radiator


1988–91 Models
  1. Disconnect the negative battery cable.
  2. Properly drain the cooling system into a suitable container.
  3. Disconnect the fan motor and motor connector.
  4. Disconnect the upper and lower radiator hoses.
  5. Disconnect and plug the automatic transaxle cooling lines at the radiator, if equipped.
  6. Disconnect the coolant reservoir overflow hose.
  7. Remove the radiator attaching bolts and brackets.
  8. Remove the radiator with the cooling fan attached.
  9. Remove the cooling fan and shroud from the radiator. NOTE: Check all cooling system hoses for any signs of damage, leaks or deterioration and replace if necessary. To install:
  10. Attach the cooling fan and shroud to the radiator and install the assembly.
  11. Attach the radiator bolts and brackets. Tighten the radiator bracket bolts to 7 ft. lbs. (10 Nm).
  12. Connect the coolant reservoir overflow hose.
  13. Connect the automatic transaxle cooling lines to the radiator, if equipped.
  14. Connect the upper and lower radiator hoses.
  15. Connect the fan motor and thermo-switch wire connector.
  16. Refill the system with the proper type and quantity of coolant, check for leaks and bleed the cooling system.
  17. Reconnect the negative battery cable. Fig. 7: Cooling system components — 1988–91 engines 86833085.gif
1992–95 Models
  1. Disconnect the negative battery cable.
  2. Properly drain the cooling system into a suitable container.
  3. Disconnect the fan motor and motor connector.
  4. Disconnect the upper and lower radiator hoses.
  5. Disconnect and plug the automatic transaxle cooling lines at the radiator, if equipped.
  6. Disconnect the coolant reservoir overflow hose.
  7. Remove the radiator attaching bolts and brackets.
  8. Remove the radiator with the cooling fan attached.
  9. Remove the cooling fan and shroud from the radiator. NOTE: Check all cooling system hoses for any signs of damage, leaks or deterioration and replace if necessary. To install:
  10. Attach the cooling fan and shroud to the radiator and install the assembly.
  11. Attach the radiator bolts and brackets. Tighten the radiator bracket bolts to 7 ft. lbs. (10 Nm).
  12. Connect the coolant reservoir overflow hose.
  13. Connect the automatic transaxle cooling lines to the radiator, if equipped.
  14. Connect the upper and lower radiator hoses.
  15. Connect the fan motor and thermo-switch wire connector.
  16. Refill the system with the proper type and quantity of coolant, check for leaks and bleed the cooling system.
  17. Reconnect the negative battery cable. Fig. 8: Cooling system components — 1992–95 engines 86833086.gif
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Aug 27, 2010 | 1991 Honda Civic

2 Answers

1993 toyota camry change thermostat


You're going to lose some coolant, so have a bucket or other container ready. Follow the upper radiator hose to the point where it's connected to the engine. The hose is clamped to a metal housing which is bolted to the engine. Remove the bolts (not the hose) and lift the housing to expose the thermostat (may require a little prying with a screwdriver or similar tool). Note how the old thermostat is fitted (which end is up), lift it out of the engine, and then remove all traces of gasket from the housing and the engine. Install the new thermostat and gasket, replace the bolts, add coolant as necessary, and you're done.

Nov 05, 2009 | 1993 Toyota Camry V6

1 Answer

The heat in my 1994 dodge caravan does not work. The van will heat up and then I try the heater sometimes it starts to then it fades to coolness.


Sounds like a partial plug in a heater hose or the heater core itself. There's not a full flow of water and it cools off faster than its replenished.The hot water valve may not be opening all the way either. Backflush the heater core,run water from a hose the opposite way it normally flows,Thru the core to clear it. Check hoses the same way. Also chech them for soft spots the hose may be collapsing internally.If the engine is not overheating the water pump is probably ok . if it is running a little too hot the thermostat may not be opening all the way either/ Replacing it could help too. Chibasset

Oct 23, 2009 | 1994 Dodge Caravan

1 Answer

1999 malibu no heat change thermo flushed rad blew out heatercore line hoses are hot get heat for a few min then goes cold air works fine


Chk for a vacuum controlled heater valve in the system. Usually on a hose. When the engine is not running it is open, but as soon as you start the engine, it closes and soon after the coolant in the core is stationary and cools down. GoodLuck _Ned_

Oct 18, 2009 | 1999 Chevrolet Malibu

1 Answer

2000 Olds Silhouette (3.4L) coolant change/flush.


Power flushing is usually not a good thing as the heater cores can become blocked.I would suggest to remove the lower rad hose and drain as much coolant as possible.Refill with clear water with lower hose reattached.Bleed system of air as you fill with water and keep filling until operating temp is reached.Drive and return and drain it again the same way,now refill with at least 1 and 1/2 gallons of dexcool and don't forget to add the vegetable based aluminum protector required in your vehicle available from gm and make sure you bleed the air from the system from the valve just to the rear of the rad filler neck on the engine at the end of the coolant pipe running across the front of the engine.

Mar 24, 2017 | 2000 Oldsmobile Silhouette

1 Answer

1996 GMC 1500 4X4 TRUCK- NO HEAT


I am going to assume that you checked to make sure the cooling system is full. The next thing to do is flush out the heater core. The easy way to do this is to clamp off the heater hoses with visegrips and remove them from the heater core. You will only loose the coolant that is in the core this way. Take a garden hose and try to backflush the core out until the water is clear. Being that you said you don't feel the inlet hose getting warm the chances are the core is completely blocked so it may take some working back and forth between inlet and outlet to dislodge anything in it. I have also had to use an air compressor to do it but you need to be very careful not to use too much pressure or you can rupture the heater core. Worst case is you will have to replace the core but I would try flushing it first. Hope this helps.

Jan 16, 2009 | GMC Sierra 1500 Cars & Trucks

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