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Overheating

Tiny
SARAS
  • MEMBER
  • 1 POST
  • 1996 FORD EXPLORER
Engine Performance problem
1996 Ford Explorer 6 cyl Four Wheel Drive Automatic

The truck drives for about 5 miles overheats then stalls! Will not start again until engine has completely cooled. Help Please!
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Friday, August 16th, 2019 AT 2:08 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,772 POSTS
If the engine is overheating, we need to determine why. Is the coolant full? Have you replaced the thermostat? Also, have you ever noticed white smoke from the exhaust?

Let me know.

Joe
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Friday, August 16th, 2019 AT 2:08 PM (Merged)
Tiny
DONNADOES916
  • MEMBER
  • 1 POST
  • 1995 FORD EXPLORER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 180,000 MILES
Vehicle overheats unless I have heater on while driving when I shut car off it will start steaming and leaking water from center of engine
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Friday, August 16th, 2019 AT 2:08 PM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,879 POSTS
The coolant level is getting too low to flow through the radiator. The heater core acts like a small radiator. In this case you already know what the problem is. You just have to figure out what's leaking and repair it.
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Friday, August 16th, 2019 AT 2:09 PM (Merged)
Tiny
LAUK57
  • MEMBER
  • 1 POST
  • 1994 FORD EXPLORER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 64,000 MILES
My car is overheating when I go above 55 or if I drive it for more than 15 min. We have changed the thermostate and the fan. The radiator is always still full of water, but it is overheating. Do you think it's the water pump? We are confused.
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Friday, August 16th, 2019 AT 2:09 PM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
With the vehicle parked and running check to see if the fans turn on from the time the vehicle is cold to when it is overheating,

to check water pump hold hands on the upper hose and pinch it shut when the engine is warm of course, but use gloves, then when releasing it you should feel a increase of pressure and a surge of water flowing past it.

Could be bad ignition timing causing this or a restricted coolign ssytem.
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Friday, August 16th, 2019 AT 2:09 PM (Merged)
Tiny
BPHILLIPS
  • MEMBER
  • 6 POSTS
  • 1994 FORD EXPLORER
I have a 1994 Ford explorer 4x4 V-6 4.0 with 123,000 miles on it and I have been chasing this overheating problem. I have replaced the radiator with a new one (4 core radiator) replaced the water pump and thermostat(6 differant thermostats) and new fan clutch. Running normally down the highway temps seem fine but when you do a hard excelleration like pulling a hill or passing another car the temp will go up drastically like to 250 degrees( accorrding to my snap on brick scanner) before it starts cooling back down and sometimes it takes awhile for it to cool back down especially if im running the hills where I have a long hard pull.

Thanks in advance BPhillips
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Friday, August 16th, 2019 AT 2:09 PM (Merged)
Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
Did you pressure test the Radiator cap?
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Friday, August 16th, 2019 AT 2:09 PM (Merged)
Tiny
BPHILLIPS
  • MEMBER
  • 6 POSTS
I replaced the radiator cap instead of checking it and the temps seem to still rise under heavy acceleration but seemed not to be as bad, but then again it was 40 degrees outside.

Question could it be possible that motor is leaning out under heavy throttle? I have also replaced 30,000 miles ago 02 sensors, plugs, wires and fuel filter(twice)

Thanks again.
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Friday, August 16th, 2019 AT 2:09 PM (Merged)
Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
I really doubt the air/fuel mix is related.

I would be very meticulous to see if there is a small leak that is hardly detectable and allowing air into the system. I can't help but wonder if there is a small crack in the head that is only opening under extreme load.

I think, I would pressure test it and let it set overnight and see if anthing appears in the morning. For that matter, pull the plugs first and look at them carefully for any signs of green.
If nothing is obvious in the morning, gently back out the oil drain plug and look closely at the first two drips to make sure oil comes out and not coolant. The coolant will settle to the bottom of the pan if it is present. If still nothing. Crank the engine over and see if anything shoots out the cylinders.
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Friday, August 16th, 2019 AT 2:09 PM (Merged)
Tiny
THUKE80
  • MEMBER
  • 2 POSTS
  • 1994 FORD EXPLORER
Engine Cooling problem
1994 Ford Explorer 6 cyl Four Wheel Drive Automatic

I have a 1994 Explorer with 183k miles. Recently my temp gauge will go to high, then drop back to normal for a few minutes, then back to high and back and forth. I turn on the heater and it shows no effect. I have noticed a loss of some coolant every week, but nothing drastic.

Thank you very much for any help.
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Friday, August 16th, 2019 AT 2:09 PM (Merged)
Tiny
MIKE H R
  • MECHANIC
  • 3,094 POSTS
I am guessing that you have a automatic. Check the temperature of the transmission and see if it is running hot that would make the cooling system work harder. Providing you do not have an external transmission cooler.
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Friday, August 16th, 2019 AT 2:09 PM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Does temperature fluctuate coming from the vent? How much coolant is leaking out?

First step is to make sure there is no air in the system and the coolant is filled in the radiator and in the overflow bottle.

To make sure you get no air jack up the front end with radiator cap off and let vehicle get warm then top off the fluids.

Sounds like your vehicles thermostat may be sticking. Or that the guage is bad. We can test the guage and if that doesnt fix it get on checking the thermostat and water pump.
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Friday, August 16th, 2019 AT 2:09 PM (Merged)
Tiny
NOS
  • MECHANIC
  • 320 POSTS
I'am wondering a couple things. If possible vaccum leak somewhere and or a timing problem under load do you here any pinging. NOS
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Friday, August 16th, 2019 AT 2:09 PM (Merged)
Tiny
THUKE80
  • MEMBER
  • 2 POSTS
There is a moderate temperature change from the vent, but not too bad. As far as leakage, I refill the reservoir about once a week. I drive on the freeway frequently and have noticed it has gotten progressively worse, running hotter before returning to mid-range.
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Friday, August 16th, 2019 AT 2:09 PM (Merged)
Tiny
BRANDO
  • MEMBER
  • 1 POST
I recently had the same problem.

However, are you leaking coolant?

If so, it may be the intake manifold gasket.

Check your plugs for white corrosion.
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Friday, August 16th, 2019 AT 2:09 PM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
You notice a sweet smell from the exhaust? Interior? Engine bay?

Might be time to have cooling system pressure tested or a cylinder compression and leak down test to see if you have a issue with the head or head gasket.
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Friday, August 16th, 2019 AT 2:09 PM (Merged)
Tiny
MIDTECH
  • MEMBER
  • 1 POST
  • 1992 FORD EXPLORER
  • 6 CYL
  • 4WD
  • MANUAL
  • 200,000 MILES
My '92 Explorer overheated 25miles from home, as I was driving it began making a gurggling sound, and lost power. I pulled off roadway, and let cool off. Replaced water in radiator, then drove another 21 miles before it again overheated, again I pulled off highway and allowed it to cool off, replaced lost water, and drove the remaining distance home.
I am pretty sure it is the water pump, however a mechanic I know said he feels it blew the head gasket, he replace my heater core a couple months ago, and when he tested cooling system, told me there was Hydrocarbons in the engine.
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Friday, August 16th, 2019 AT 2:09 PM (Merged)
Tiny
BPHILLIPS
  • MEMBER
  • 6 POSTS
I have a 22,000 pound external trans cooler after the radiator (brand new) and I have a heat sticker on trans pan and it shows good 190 is first red spot and it not red. But also if engine running hot trans will run hot also to certain point.

I dont seem to be losing any antifreeze at least overflow tank seems full and radiator full when cold.

I dont know about timeing being right as it is DIS ignition.

Thanks again for replies.
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Friday, August 16th, 2019 AT 2:09 PM (Merged)
Tiny
MIKEMANIS
  • MEMBER
  • 4 POSTS
It could be the thermostat sticking when it gets old or you havn't had coolant flushed for a while it can cause buildup to occur and it could be sticking and not allowing coolant in try replacing it its the cheapest fix
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Friday, August 16th, 2019 AT 2:09 PM (Merged)

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