Question about 1994 Nissan Pickup

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Thermostat Location I am trying to locate my thermostat. My engine runs too cool which effects my engine efficiency, and I want to test the thermostat and replace it if necessary. I cannot locate the thermostat by eyeballing the engine however. So if someone can tell me where on the engine it is I would like to check it out. This is on a 1994 4 cylinder K24 engine.

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The thermostat on this engine is located where the lower radiator hose connects to the engine. I have replaced mine, and I found that the easiest way to get at it is to remove the power steering pump and set it over to one side. The thermostat housing is directly below where the power steering pump is mounted.

Posted on Nov 05, 2008

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Follow the upper water hose from the radiator to the engine, thermostat is where the hose stop. you will see 3 bolts holding down a semi-round object. unbolt it, the themostat is under neath.

Posted on Oct 31, 2008

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2 Answers

I think the thermostat on my 1993 mark 8 is bad


Thermostats are simple replacements. 9 times out of ten you just follow the upper hose on your radiator to where it attaches to your engine and the thermostat will be located behind the 2 and sometimes 3 bolts. Make sure your vehicle is completely cool, and bleed the air out of the system when you're done. Good lick

Feb 08, 2015 | Cars & Trucks

1 Answer

Where is the thermostat located


Hi,

Your engine must be cold before removing the thermostat.

Find the location of your thermostat by following the rubber hose located on bottom of your radiator (passenger side) to the point where it attaches to the engine. Remove the two bolts at that location and you'll find your thermostat nestled in there.

Be sure to place a pail under the car to contain the coolant.


Thermostat Operation:

00047_thermostat.jpgThe automotive thermostat is a temperature controlled on and off valve. When the temperature rises to a predetermined temperature, the thermostat opens up to allow the engine coolant to flow through the cylinder block and the radiator. This flow is crucial to maintain optimum operating temperature for fuel efficiency, enhanced driveability, and engine protection. The coolant flow is reduced when the engine is cold, and the flow is increased when the engine is hot. Contrary to popular opinion, operating the vehicle without the thermostat doesn't make the engine run cooler. It will actually run hotter because there isn't a thermostat to slow the coolant flow. This means the coolant doesn't stay in the radiator long enough to dissipate its heat.


All the best

Ben

May 24, 2011 | 1993 Cadillac DeVille

2 Answers

It only heats well when were driving if you are stopped at a light or in traffic it starts blowing cool air


Probably needs a new thermostat.

If you replace this yourself, open drain on radiator to remove the current coolant. If you can't find a drain, loosen clamp on the radiator end of the lower hose and drain. Don't forget to re-tighten the clamp!

Be sure to catch the drained coolant for proper disposal. Some types are poisonous to animals, so be sure to protect your pets by following proper disposal procedures.

Once drained, remove bolts on thermostat housing, remove old thermostat (taking care to notice its orientation in housing), clean the gasket mating surfaces, install the new thermostat (taking care to properly orient in housing), put on new gasket and reverse removal steps. Don't overtighten bolts on the thermostat housing, as it's possible to break the housing if too much torque is applied

Be sure to evacuate any trapped air in the systems so as to get proper cooling effect.

A model specific repair manual should show the location of air bleed ports (if any). Older vehicles tend to not be as difficult to properly eliminate any trapped air as newer vehicles. Your '01 Tracker probably has at least 1 bleeder port.

After installation, run engine until thermostat fully opens, then add coolant as required to fill. Once the thermostat opens and coolant starts to circulate, the level previously established in the radiator is likely to drop.

Additionally, it's a good idea to give another coolant level check after the engine has completely cooled down and the expansion effect of heat has ceased. If equipped with a coolant recovery tank, make sure it is filled to the proper level as noted by the fill marking on the plastic tank.

Also be sure that you have adequate antifreeze protection.

Generally a 50 / 50 mixture will provide adequate protection against freezeup. This depends, to some extent, on the general winter temps in your home area. Obviously, if the temperature can routinely go below 0 degrees, you need even greater antifreeze protection.

Hope this helps!

Dec 26, 2010 | 2001 Chevrolet Tracker

2 Answers

Where is the thermostate located on my 2005 jeep liberty


Thermostats almost always reside in a housing at the engine side end of the upper radiator hose. Drain coolant first, then loosen radiator hose to access thermostat housing. If you can't find the housing, consult your vehicle service manual for location.

Loosen the bolts that hold down the thermostat housing. Remove the housing to reveal the thermostat.

Note the location and orientation of thermostat relative to the engine. Remove thermostat.

Use a scraper to remove old gasket material from all mounting surfaces.

Place new gasket on housing. Use a small amount of grease or adhesive to hold it in place during reassembly.

Make sure new thermostat is oriented properly and reinstall the housing.

Reconnect all hoses. Close radiator petcock. Refill cooling system with recommended 50/50 blend of water and coolant. Run engine and heater to purge air from cooling system. Recheck the coolant level once engine is cool.
found info on web site listed
Good luck

Dec 17, 2010 | 2005 Jeep Liberty

1 Answer

2003 CHEVROLET SILVERADO 2500HD 6.0 - thermostat location and replacement


4.8L, 5.3L & 6.0L Engines
  1. Remove the air inlet duct.
  2. Drain the cooling system.
  3. Remove the radiator outlet hose.
  4. Remove the thermostat housing bolts.
  5. Remove the thermostat from the water pump housing.

The O-ring seal is integral to the thermostat housing



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Thermostat housing-4.8L, 5.3L and 6.0L engines


To install:

  1. Install the thermostat to the water pump housing making sure the spring side is inserted into the engine.
  2. Install the bolts.
    • Tighten the bolts to 11 ft. lbs. (15 Nm).
  3. Install the radiator outlet hose.
  4. Fill the cooling system.
  5. Install the air inlet duct.
  6. Test the system for leaks.
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Nov 13, 2010 | 2003 Chevrolet Silverado 2500HD

1 Answer

Cooling system thermostat location


9c21ffb.jpg

Fig. Thermostat location-2.2L engine


fd91508.jpg

Fig. Thermostat location-4.3L engine

Hope this helps (remember to rate this answer).

Oct 28, 2010 | 2000 Chevrolet S-10

2 Answers

By remove thermostat is there any effect in fuel consumption?


yes, engine is more efficient when warm. Thermostat gets engine warm much faster.

Oct 11, 2010 | 1997 Honda Civic

1 Answer

I am looking for where the thermostat on my 2003 corolla s 2.0 4 cylinder.. where is it located?


The thermostat is located in the water inlet housing that is connected to the lower radiator hose.
The thermostat is equipped with a by-pass valve. If the engine tends to overheat, removal of the thermostat would cause a decrease in cooling system efficiency.

TY for using Fixya (remember rated and comment this).

Apr 01, 2010 | 2003 Toyota Corolla

1 Answer

Changed expansion tank but light still on any ideas 03 ford escape low coolant level light on dash stays lightup


bad low coolant switch or still low on coolant.

Engine Cooling The cooling system components are the:
  • engine coolant temperature sensor (ECT sensor) (12A648)
  • radiator (8005)
  • degas bottle (8A080)
  • radiator draincock (8115)
  • water pump (8501)
  • water temperature indicator sender unit (10884)
  • water thermostat (8575)
  • dual speed fan motor assembly
The water pump circulates the coolant.
The water thermostat:
  • controls the engine coolant temperature.
  • allows quicker engine warm-up.
The degas bottle:
  • provides a location for fill.
  • contains coolant expansion and system pressurization.
  • provides air separation during operation.
  • replenishes the engine coolant to the system.
The fan motor (8C607):
  • operates only when the ignition switch is in the RUN position.
  • will not operate with the switch in the OFF position.
The engine coolant flows:
  • from the lower radiator hose (8286) to the water pump.
  • from the water pump to the engine block and the cylinder heads.
A closed water thermostat returns the engine coolant to the water pump; an open water thermostat allows the engine coolant to flow to the radiator.
Engine coolant provides freeze protection, boil protection, cooling efficiency and corrosion protection to the engine and cooling components. In order to obtain these protections, the engine coolant must be maintained at the correct concentration and fluid level in the degas bottle.
When adding engine coolant, use a 50/50 mixture of clean, drinkable water and engine coolant.
To maintain the integrity of the coolant and the cooling system:

Dec 07, 2009 | 2001 Ford Escape

1 Answer

2005 Chrysler 300 thermostat location?


Hi,

In your Model :-

The automotive thermostat is a temperature controlled on and off valve. When the temperature rises to a predetermined temperature, the thermostat opens up to allow the engine coolant to flow through the cylinder block and the radiator. This flow is crucial to maintain optimum operating temperature for fuel efficiency, enhanced driveability, and engine protection. The coolant flow is reduced when the engine is cold, and the flow is increased when the engine is hot. Contrary to popular opinion, operating the vehicle without the thermostat doesn't make the engine run cooler. It will actually run hotter because there isn't a thermostat to slow the coolant flow. This means the coolant doesn't stay in the radiator long enough to dissipate its heat.

TO TEST THERMOSTAT

There are several ways to test the opening temperature of a thermostat.
One method does not require that the thermostat be removed from the engine.
  • Remove the radiator pressure cap from a cool radiator and insert a thermometer into the coolant.
  • Start the engine and let it warm up. Watch the thermometer and the surface of the coolant.
  • When the coolant begins to flow, this indicates the thermostat has started to open.
  • The reading on the thermometer indicates the opening temperature of the thermostat.
  • If the engine is cold and coolant circulates, this indicates the thermostat is stuck open and must be replaced.
The other way to test a thermostat is to remove it.
  • Suspend the thermostat completely submerged in a small container of water so it does not touch the bottom.
  • Place a thermometer in the water so it does not touch the container and only measures water temperature.
  • Heat the water.
  • When the thermostat valve barely begins to open, read the thermometer. This is the opening temperature of this particular thermostat.
  • If the valve stays open after the thermostat is removed from the water, the thermostat is defective and must be replaced.
  • Several types of commercial testers are available. When using such a tester, be sure to follow the manufacturer's instructions.
  • Markings on the thermostat normally indicate which end should face toward the radiator. Regardless of the markings, the sensored end must always be installed toward the engine.
  • 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.
4fa3f4e.jpg


Positioning a thermostat into an engine.
  • 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 both hands of the technician free to align and bolt the thermostat securely in place.

TO REPLACE THERMOSTAT

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.
NOTE When a paper gasket is used and the recess is in the thermostat housing, it is a good practice to position the thermostat into the recess and glue the gasket to hold it in place. If it falls out of its groove during installation, the outlet housing can be cracked or a coolant leak will result. Before tightening the water outlet housing, try to rock it back and forth to be sure it is flush. Housings are often cracked during this step.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!



Oct 07, 2009 | 2005 Chrysler 300

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