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Posted on Oct 31, 2010
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How to install a thermostat in a ford ranger 4.0L engine?

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JOHN LAPIER

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  • Ford Master 2,602 Answers
  • Posted on Nov 01, 2010
JOHN LAPIER
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Joined: Oct 01, 2010
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Its easy follow the top radiator hose back to the engjne to the goose neck the t.stat is under this part Drain some antifreeze from radiator you don;t have to drain itall out Remove clamp from hose to goose neck Remove bolts holding neck on you will lose a little antifreeze in the prosses Claen all old gasket meterial off bolth sides this is important it must be clean Remove old t.stat check the tempature stamped on t.stat replace with the same or similar temp you don;t change this to much Install new t.stat and gasket you can use a sealer it won;t hurt Install goose neck but don;t over tighten you can crack the neck 10 to 12 ft lbs is all you need BUT THE T.STAT IS NOT USELY NOT THE PROBLEM WITH COOLING SYSTEMS you can try back flushing the system and putting new antifreeze first this may solve your over heating problem

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Ford falcon 4,0L engine fix radiators but brownish fluid came out on cooling system small radiator in front what is problem
Does not sound good. A brownish fluid is the result of coolant mixing with engine oil. And if engine oil is getting mixed in with your coolant, that indicates a crack somewhere in block where oil is getting into the coolant tubing. Also could be a bad head gasket.
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11_17_2012_2_17_53_am.jpg
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What would cause a 1994 Ford Ranger to heat to the L of 'NORMAL' on the gauge after a new thermostat was installed? It has never been past the r/m consistently.
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Hi, remove the cap from the top of radiator and set aside. Locate thermostat housing on side of engine block. When you are standing in front of the truck, looking at the engine, the thermostat should be on the side of the motor block near the right front.
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Apr 09, 2011 • 2004 Ford Ranger
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Ford ranger 2001 2.3 Ihave to replace the thermostat, What is involved/
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  1. Drain the cooling system.
  2. Disconnect the radiator hose and the electrical connector.
  3. Disconnect the radiator lower hose.
  4. Remove the bolts and the thermostat housing.
  5. To install, reverse the removal procedure. Tighten the housing bolts to 89 inch lbs. (10 Nm).

Hope helps (remember to rate and comment this).
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Oct 01, 2010 • 2001 Ford Ranger Regular Cab
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Replace thermostat on 99 ford ranger with 2.5 engine
The upper radiator hose is connected between the upper radiator and the thermostat housing. Drain the coolant then remove the upper radiator hose from the thermostat housing, replace if necessary. Remove anything blocking access to the two bolts holding the housing to the engine such as the belt cover. Pay attention to the orientation of the thermostat so you install the new one correctly. If the housing is corroded or pitted you have have to replace it or suffer leaks. Push a rag into the engine opening now exposed and clean the contact surface well so it won't leak later. Installation is the reverse of the process.
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Oct 12, 2009 • 1999 Ford Ranger SuperCab
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the open pipe that you took the hose off of is the thermostat housing, you will need to remove this to reveal the thermostat, make sure you use a new gasket with sealant when reinstalling thermostat housing to prevent leaks and dont over tighten the bolts,run both bolts down as far as you can before final tightning
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Dec 26, 2008 • 2000 Ford Ranger SuperCab
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How do you change the thermostat on a 98 ford ranger 2.5L
CAUTION If the radiator is filled to the top with coolant and the engine is run without the radiator cap in place, the coolant will expand and spill over as the engine warms up.

  • Drain some coolant into a clean container until the coolant level is below the thermostat housing.
  • Remove the upper radiator hose connection from the thermostat housing.
  • Loosen the housing bolts and remove the housing.
  • Remove the gasket and scrape it carefully from the surface of the housing and the mounting surface on the engine. If the gasket remains on either of the surfaces, there will probably bea coolant leak after reassembly. Some engines use a rubber O-ring to seal a thermostat housing.
  • Compare the size of the thermostat to the old one. They are of different sizes, types, and temperature ratings.
  • The temperature rating is stamped on the sensing bulb on the bottom of the thermostat. The temperature bulb faces the block.
  • When replacing a thermostat, be sure that the thermostat fits into the groove in the block or outlet housing. If the thermostat is installed upside down, the engine will overheat.
  • Install the gasket.
  • Reinstall the thermostat housing. Refill the system and run the engine or pressure test to check for leaks.
  • When the engine has reached operating temperature make sure the thermostat opens.
  • You should be able to see coolant circulating within the radiator.
  • Another way of checking thermostat operation is to feel the top of the radiator hose or use a thermometer or multimeter with a temperature probe to confirm that the coolant is warming up.
  • If the engine is overheating, but the top hose is still cool to the touch, the thermostat is stuck closed and must be replaced.


When replacing the thermostat, also replace the gasket that seals the thermostat in place and is positioned between the water outlet casting and the engine block.
Generally, these gaskets are made of a composition fiber material and are die-cut to match the thermostat opening and mounting bolt configuration of the water outlet. Thermostat gaskets generally come with or without an adhesive backing. The adhesive backing of gaskets holds the thermostat securely centered in the mounting flange, leaving your both hands free to align and bolt the thermostat securely in place.
  • Remove the thermostat housing.
  • Remove the gasket and scrape it carefully from the surface of the housing and the mounting surface on the engine. If any gasket remains on either of the surfaces, there will probably be a coolant leak after reassembly.
  • Some engines use a rubber O-ring to seal a thermostat housing.
  • Install the gasket.
Hopefully this is helpfully
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Nov 17, 2008 • 1998 Ford Ranger SuperCab
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