1999 ford explorer SOCH 4.0 ltr

Follow the top radiator hose down to where it connects to the engine. You should find a dome shape item or a couple of smaller bolts that attach to the engine to the side of the radiator hose and the thermostat will be inside the housing. You will need to drain the radiator, remove the bolts holding the thermostat housing to the engine and remove the old stat and put in a new one be sure to make note of how the stat is facing when you remove it and put the new one in the same way. then reconnect the thermostat housing making sure the gasket is in place so it won't leak, then refill the radiator slowly so you don't cause an air lock in the radiator, with cap still off start the engine and allow it to warm up until the stat opens and then you will need to add more antifreeze to the system. Double check for any leaks. Turn on the heater and make sure you have good heat and you should be good

For a metal housing to blow there has to be a problem with the installation of the unit as any pressure to do this would blow hoses and radiators first.. Most likely the problem will be trying to bolt up the housing on a bad surface or the incorrect fitting of the thermostat that is putting pressure in the housing. clean up the surface with a good emery/ sand paper. clean out the bolt threads using a thread tap to ensure that the bolts are not bottoming out. fit the thermostat with the body of the unit facing into the head Use a new gasket and gasket goo. fit properly ensuring that the housing sits on the mating surface all the way around. fit the bolts and tension correctly. Normally around 15-20ft/lb is tight enough

Hello,
The location of the thermostat for most vehicle.

Stand in front of the car with the hood open, you'll see a black hose hooked to the upper side of the
radiator.( about 2 inch in diameter, newer vehicles about 1 and 1/2 inch, and newer small cars
about 1 and 1/4 inch. ) Follow the hose to the other end, it connects to the thermostat housing. The thermostat is inside of the housing.( the hose usually goes to the air intake manifold, but some
housings are on the side or back of the engine. )

How to test the thermostat in most vehicles;

Make sure the heater is off, start the engine and let it run for 6 to 8 minutes, ( this will allow the
engine to reach, " normal operating temperature "), from the inside of the vehicle turn the heater
temperature on high and turn the fan speed on high.
1. Listen very closely for a click sound from the engine, ( most thermostats make a click when
they open )
2. Watch your temperature guage, it should begin to lower as the coolant starts to circulate.
3. Usually within a few minutes the radiator fan will kick.

To replace the thermostat in most vehicles yourself;

Remove the hose from the housing, then remove bolts from the housing and lift the housing off
to access the thermostat. Pay attention to witch side is up on the thermostat that you remove, the
new one will have to go in the same way. Also look at the temperature rating that is stamped into
the thermostat that you take out, and make sure the new one has the same temperature rating.
(failure to do so can cause false readings by some sensors, and may start triggering error codes)
Install new thermostat, right side up, put housing back on and bolt back down, hook hose back on
to the housing. Check the coolant level. Start the engine and let it run for 6 to 8 minutes to reach,
"normal operating temperature", and look for any leaking. before you turn the engine off turn your
heater wide open and listen for a click. Most of the time when a thermostat opens you can hear a
click and may hear the coolant flowing through the system. Shut the engine off, wait for it to cool
down and then check your coolant level one more time. ( do not fill all the way up, only fill to
FULL line on resrvior.)

I hope this helps you.

1. 1 Drain the coolant from your Explorer into an adequate container by opening the drain plug at the bottom of the radiator. Save the coolant for reuse if it is relatively new and clean.
   
2. 2 Remove the negative battery cable from the battery if your Explorer has a 2.9-, 3.0-, 4.0- or 5.0-liter engine. This step is not necessary for 2.3- and 2.5-liter engines.
   
3. 3 Follow the upper radiator hose to the front driver's side of the intake manifold, where it meets the engine. This is where the thermostat housing on your Ford Explorer is located. If necessary, remove the air cleaner duct for easy access to the housing.
   
4. 4 Loosen the clip on the end of the radiator hose and pull the hose off the thermostat housing. Use a 10mm wrench or socket to remove the two retaining bolts on the thermostat housing cover. Remove the cover.
   
5. 5 Note the position of the thermostat before removal. Pull out the old thermostat. Seat the new thermostat inside the housing in the same position as the old one, spring-side facing into the engine. Install new gasket over the thermostat.
   
6. 6 Reattach the thermostat housing cover and the radiator hose. Reinstall the air cleaner duct if removed earlier. Fill the radiator with reserve or new coolant. Start your Explorer and run with the heater blowing until the engine gets warm. Check for leaks.
   

Read more: How to Change the Thermostat in a Ford Explorer ' eHow.com http://www.ehow.com/how_4484916_change-thermostat-ford-explorer.html#ixzz1CLSvmPwR

sounds like you didn't seat the new thermostat correctly, check that first. Other then that you will need to have it pressure tested again to find out what else is leaking.

if you find top hose follow it to engine -thermostat housing have to bolts most times /1)drain coolant 2)take about bolts pull up housing take out thermostat 3)put thermostat in (note;how thermostat is turned put new one same way) clean housing good 4)put gasket on with little bit of sealant tigthen bolts 5)put hose back on 6)fill up radiator with coolant &let run till warm up [check for leaks while warming up }top radiator off ;;;;;done

Detach coolant hose after draining down the coolant below that level. Take off the housing, you may need a rubber mallet to break seal/gasket. You might as well replace thermostat while your there. Use new gaskets or sealant, then put on new housing nice and tight. Reattach coolant hose and refill radiator. The coolant temperature sensor is near there and if old you should change this also while you are doing this and coolant level is already lowered.

The coolant sensor is located on the top of the thermostat housing. There are 2 sensors there. It is the one closest to the passenger side.

need to diconnect the battery, drain the coolant, the thermostat is located on the right side of the engine as you are looking at it, follow the big upper radiator hose from the radiator the the thermostat housing, diconnect the hose from the housing, the remove the three bolts in the housing, pop the housing off and the thermostat should be stuck in the housing, note the position of the thermostat in the housing because it will only go back in one way, clean off the old gasket from the housing and the lower intake manifold, intsall the housing back onto the manifold with the new thermostat and gasket, start the bolts with your fingers and torque them to 90 in-lbs(inch pounds), connet the radiator hose to the housing, be sure to replace the hose clamp if its damged, fill the cooling sytem and connect the battery, start the engine and chek for any coolant leaks, be sure to check the coolant level after the engine has reached operating temp .

You'll have to drain system down when cooled off, remove any brackets in your way such as power steering reservoir holding bracket, then remove 2 bolts holding the housing, and remove it. Rad hose should be o.k. to leave on, but if it creates a problem, remove it as well. I'd install a new thermostat and "o" ring complete,then a new gasket as well. Clean all surfaces well before re-installing. Replace any bracket(s) you removed to access housing, after housing is installed. Remember, air valve on edge of thermostat goes in 3 oclock position when re-installed. Also a reminder as well, spring on thermostat goes down when re-installed. After all is re-assembled, re-fill coolant and start engine and run with heater on to bleed out all air. Leave rad cap off and pay attention to temperature gauge and when you see it getting to normal operating temperature, watch flow in rad for increased flow, indicating thermostat opened and coolant is circulating properly. Wait until you see that flow increase 2 or 3 times, and air should be out of system, and top up coolant in rad, put cap back on, and check that return bottle is at proper level as well. Keep an eye for any leaks, and re-check return bottle periodically for first little while, just to be sure all is good. Note: some only use the "O" ring as a seal, and no gasket is required, but just check that at autoparts place where you get part.