Thermostat problems

Thermostat: It regulates the engine's temperature and it changes the refrigerant flow into the radiator.
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Temperature raise SolvedSolved

Ford Ranger 2005  450000 miles
When the temperature is at its normal range, water starts to leave the deposit and, when there is a water deficit, the temperature raises. The odd thing is that the hose that carries water to the pump is always cold, even the hose that leaves the thermostat, and they are hoses that enter the superior part of the radiator and thus should be hotter. It seems as though water was not flowing. The thermostat is new, so it might be a housing failure, as the gasket was changed for a new and original one.
caleb from United States 9 years ago  
CA
9 reports 
Solved
Best answer (according to caleb)
mandy from United States 9 years ago
Buddy, your thermostat housing is damaged, so it is opening even with low pressures.
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Cooling pressure

Ford Ranger 2010 Diesel ute 3.0  300000 miles
I’ve done head gasket water pump thermostat egr cooler flushed radiator and put a new cap one. Still pushes water out the resivor bottle ?? Any ideas. Otherwise drives fine.
James from Australia 8 months ago  
JA
3 replies 
gronski from United States 8 months ago
Have you tried not filling up the overflow and does it suck coolant back into the system once it cools down? might have to much coolant when it heats it expands overflow catches excess then when cooled creates a vacuum which sucks the coolant from the overflow back into the system but if both are filled to top will overflow the overflow
James from Australia 8 months ago
Yes but it will pressurise the system within 4 mins of start up not even time enough to get warm. And with the cap off. After sitting over night start it up pushes water out the radiator. I’ve had the head checked twice and the block looks fine. It’s doing my head in.
Sholly from Australia 5 months ago
I'm having the exact same problem did you resolve your s
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Ford Ranger 2011 PK

Ford Ranger 2011  150 miles
I have changed thermostat,radiator cap,discus fan and EGR cooler and I still get over hating when I am on hills only. Don’t know what it is ?
Help
Joshie13 from Australia 6 years ago  
JO
1 report 
Wiselaw from Australia 6 years ago
Blown head gasket check then Blue devil in radiator fixed it when workshop quoted $6k to repair still going after few 1000k. Thermstat too low down so bubbles collect around it faking a cooling effect so thermostat stays shut. At moment still to reinstall new thermo by next winter down under.
Joshie13 from Australia 6 years ago
Thanks mate for the info. Did yours lose water and only over heat on a hill??
Wiselaw from Australia 6 years ago
It overheated to steam overflow after 5mins of driving but we left the car in the paddock for a few yrs while we researched the bluedevil treatment. Tested it on a 81 honda civic and that worked. Then our Ford Ranger was filled with contaminated fuel, so necesity became the motivating factor as we had no wheels. My hunch is leaving it all flushed with no coolant in the water may have corroded the crack in gasket that allowed compression gasses into cooling system. This caused a pressure cooker effect and the thermostat being at the low point in the system it misses the extreme heat buildup at top of radiator, staying closed and allowing a vicious circle of pressure cooker high temperature water gushing out into overflow bottle. Maybe similar as the thermostat placement and no design to handle cavitation gases keeping the thermostat cooler than the cooling water actually is due to the insulating effect of the cavitation gases. Some i read tried drilling a 8mm hole in the thermostat plate to get rid of cavitation gases if they form. I will keep the thermostat out over our hot summer to give the blue devil good opportuninty to penetrate any compression leaks into radiator water. Good to check compression with any low readings indicating the suspect cylinder. If it is one, leave the spark plug lead off, and plug loosened so compression gases do not blow back the blue devil sealant in that cylinder. You idle the car for about 1 hour. So you do not want it to overheat during treatment.
Taytum from New Zealand 6 years ago
I have the same problem in my 2010 ranger any more information would be appreciated
Wiselaw from Australia 6 years ago
Look up and view youtube vids on BlueDevil head gasket sealer and closely consider both good reports and bad reports and consider who gains most from the repair adice options. May be I was lucky and leaving the car "in the paddock" for a few years like RR did with its blocks b4 they installed in cars corroded the compression leak or crack closed.
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Heater not working

Ford Ranger 2004 ranger xlt 3.0 engine automatic 110000 miles
Heater control valve changed,thermostat changed,heater core flushed was clean,air forced out of system,still blows cold air?
Harley from United States 6 years ago  
HA
11 reports 
Grease monkey from United States a year ago
When I turn the knob to get heat still blows cold air. I felt the water lines going to the heater core and both are hot but it still blows cold at the vent
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