Asked by Dec 09, 2015 at 01:57 PM about the 2005 Ford F-150 FX4 SuperCab 4WD

Question type: Maintenance & Repair

I have a 2005 F-150 Ford pickup that is overheating. I replaced the thermostat
with a factory new one but it still overheats. The large rad. hose that comes
from the thermostat housing to the rad. heats up only half way . Its not hot at
the rad. end. I know the thermostat is installed properly.What could be causing
this? Thank you in advance.

6 Answers


If there is no water circulation then it may be the water pump.


Remove t stat and reinstall hose and run vehicle to see if vehicle still over heats because I have seen some brand new thermostats be bad. If you remove t stat and vehicle still over heats there is a clog in the cooling system. Could be a clogged radiator or a clogged passage in the engines cooling system. Are the fans coming on ?

1 out of 1 people think this is helpful.

Thank you for the help. have already did the remove the rad. test so Im thinking it is as you say a clog somewhere in the cooling system. What do you suggest I do now. Thanks again.


First I would suggest a good cooling system flush Prestone Super Flush is good. Also would suggest cleaning the radiator coils or if A.C condenser sets in front of radiator clean those coils so that the radiator can get good air flow. Use a garden hose a nozzle to clean coils of bugs and dirt that may be restricting air flow. If all of that fails radiator may be clogged and needs to be replaced.


Also would not disregard Regrets suggestion about the water pump it only happens on rare occasions but the propeller to the pump may have broken loose and not circulating coolent through the system.


Thanks for the info. and quick response. Will try your suggestions.

Your Answer

Add photo

Related Questions

  • truck is overheating 3 answers

    okay i just finished up repairing my truck 96 ford f150 5.0L I replaced the engine/coolant sensor, the thermostat, water pump, new antifreeze (right mixture) filled it up, let it run for about 3 min...

    1996 Ford F-150 XL LB


    Maintenance & Repair

  • 89 f150 overheating...STILL!!! 3 answers

    I'm hoping somebody can help me cause I'm out of ideas. My f150 302 5.0 v8 is overheating and overflow boils over. I strtd out with a new thermostat with no luck. Then I replaced the water pump.....

    1989 Ford F-150


    Maintenance & Repair

  • trans OVERHEATING??????? 3 answers

    what would make my trans suddenly overflow. did this once before Years ago. checked fluid a month ago n was right on the mark now showing over fill and is running out of the overflow. THANKS IN ADVANC...

    1992 Ford F-150 XLT Lariat 4WD Extended Cab LB


    Maintenance & Repair

  • Why is my 5.0 F-150 overheating? 4 answers

    I have installed a new thermostat and a new water pump along with plenty of coolant.Any suggestions as to why it still overheats after running for about 10 minutes? I also drained the radiator several...

    1987 Ford F-150


    Maintenance & Repair

  • Overheating 4 answers

    Today on my way home from work my car started overheating there's no water leaking anywhere the heater blows hot why would it be overheating

    2000 Ford Escort ZX2


    Maintenance & Repair


Looking for a Used F-150 in your area?

CarGurus has 216,434 nationwide F-150 listings starting at $1,900.


Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
Reputation 6,010
#2 dandyoun
Reputation 3,890
#3 tennisshoes
Reputation 2,300
View All

Related Models For Sale

Used Chevrolet Silverado 1500"
2,489 Great Deals out of 143,840 listings starting at $1,995
Used GMC Sierra 1500"
1,028 Great Deals out of 56,304 listings starting at $2,499
Used Dodge Ram 1500"
521 Great Deals out of 13,813 listings starting at $995
Used Toyota Tundra"
617 Great Deals out of 26,500 listings starting at $2,500
Used Ford F-250 Super Duty"
460 Great Deals out of 42,794 listings starting at $2,250
Used Toyota Tacoma"
647 Great Deals out of 30,207 listings starting at $2,850
Used Ford Mustang"
737 Great Deals out of 41,260 listings starting at $900
Used Nissan Titan"
220 Great Deals out of 13,198 listings starting at $4,500
Used Ford Explorer"
1,369 Great Deals out of 71,675 listings starting at $300
Used Ford Ranger"
264 Great Deals out of 7,727 listings starting at $988
Used Chevrolet Tahoe"
1,071 Great Deals out of 36,223 listings starting at $1,700
Used Chevrolet Colorado"
334 Great Deals out of 17,551 listings starting at $2,495
Used Nissan Frontier"
440 Great Deals out of 20,609 listings starting at $2,500

Used Cars For Sale

2014 Ford F-150 FX4 SuperCab 4WD For Sale
7 Great Deals out of 130 listings starting at $21,926
2013 Ford F-150 FX4 SuperCab 4WD For Sale
8 Great Deals out of 153 listings starting at $19,995