Question about 1999 Mercury Sable

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I have a 1999 Mercury Sable. I have put 4 full containers of 50/50 antifreeze into the resevoir since I changed the thermostat thinking that might be the reason for it running hot and not blowing any heat(I'm an amatuer!!) For some reason it is empty every day. What might that be???? thanks in advance for any help

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  • 490 Answers

Do you see a leak anywhere on the ground under the car??
check the oil and make sure it is not mixing oil and water

Posted on Apr 22, 2009

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2006 Chevy trail blazer. Keeps getting hot. Anti-freeze is full, overflow container is half full. Every time I turn it off can hear fluid in radiator boiling and bubbling?


Pam are you sure it's boiling? If the Antifreeze is boiling I'd think you'd see steam coming out of your reservoir as the water expands into the reservoir, but you didn't say you see anything like that.
Of course engines get hot, that's why we have the cooling systems but it doesn't sound like it's "boiling" to me with no signs of visible steam unless your antifreeze level is really low?

If it's really boiling, and you antifreeze level is good, then your reservoir should be getting filled up with expanded hot water that goes into it to catch it when it expands.

If the water isn't going into the reservoir, then maybe your antifreeze level in the radiator is too low and you need to add antifreeze?
.
Best to fill the radiator with the engine cooled down. If you ever have to open the radiator when it's hot, NEVER open it with your bare hand as you could get scolded with boiling water. Instead use a big thick towel to remove the radiator cap off a hot engine. Again, if you can, just wait until the engine cools then open the radiator cap.

With the engine cool, you can fill the radiator with a 50/50 antifreeze mix. The 50/50 mix come premixed 50 percent water, and 50 percent antifreeze. So you can throw that stuff straight into the radiator.

Non mixed antifreeze needs to be mixed 50/50. Some people use 50 percent distilled water when they mix it because distilled water doesn't have the minerals in it that may get stuck in your radiator. That's being a bit picky about it though. Tap water works fine in a pinch. The other 50 percent is antifreeze. You can mix it right in the radiator too, put in a measured amount of the antifreeze, followed by the same measured amount of water. The water pump will mix it all together when you run the engine.

Put the cap back on and run the engine and if/when the water "boils" it should go into your reservoir. If it does boil in go in the reservoir then yes...your engine is getting hot and the antifreeze is boiling.

When the antifreeze boils, it's probably because your thermostat is stuck closed. That means the thermostat isn't letting water circulate through the radiator to get cooled. Thermostats are cheap...no more than $30 I'd say for most cars. Changing them is pretty easy too as they are usually right at the top of the engine. A mechanic may charge $100 to change it....but it's an easy job on most vehicles requiring just a couple sockets/socket wrench.

Oct 03, 2016 | Cars & Trucks

1 Answer

Low coolant keeps coming on and resevoir is full


Copy and paste the following links one-by-one into your browser:

www.obd-codes.com/p0174
www.obd-codes.com/0401

Apr 30, 2012 | 1999 Mercury Sable

1 Answer

Our mercury sable 1993 keeps overheating


are the cooling fans running? is it loosing water from exhaust or in the oil check these things water is going somewhere

Jan 16, 2012 | 1999 Mercury Sable

1 Answer

When i turn the heater on my 2000 mercury sable cold air comes out


Check the radiator coolant level. If full with proper 50/50 mixture most likely cause is the thermostat.

Oct 15, 2011 | 2000 Mercury Sable

1 Answer

Our mercury sable 1999 keeps overheating very hot changed threomstat help please it has 125000 miles changed altnater, water pump what else can it be


Hello,
I read your problem and what you have done to try and rectify the problem. Let me say this first. You did a great job of trying to fix this over heating problem. There is only a couple other things to check or have done to solve this overheating problem. Only other things it can be that cause it to over heat is Number one, make sure your temp sensor is operating proper, you can have this checked by any repair shop, they will check with a amp meter. And assuming you do not have a head gasket leaking, which would cause over heating, what i would do is have the radiator system flushed, and put under pressure. Reason for this, is a lot of times, radiator gets some what partially clog, this is due over time from not proper antifreeze and water ratio. Internal parts and coils of radiator become partially clogged as things break down inside. First thing, i would suggest if to have radiator flushed and then see if it flows correctly via the new thermostat you just put in, and of course the water pump is providing the proper flow of operation. If that does not work, have them check the coolant sensor, to make sure it is triggering correctly to allow the thermostat to operate normally. I hope this helps, Thank You, Mike
mc1bean_124.jpg

Aug 06, 2011 | 1999 Mercury Sable

2 Answers

I just changed the radiator. How much antifreeze do I put in?


put a 50/50 mix. remove radiator cap when cold,start car let run 1 min and dump 50/50 mix till full, a little will come out cap when thermostat opens this is normal,when thermostat opens coolant will go down,continue to fill till full,put cap on and fill reservoir to cold mark,check reservoir after you run a day and fill if needed to the full cold mark again

Jan 21, 2011 | Chevrolet Monte Carlo Cars & Trucks

1 Answer

How do you replace a thermostat on a 1999 mercury sable dohc?


Here ya go!

3.0L DOHC VIN S Engine
CAUTION NEVER open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities.Always drain coolant into a sealable container. If necessary, clean coolant maybe reused unless it is contaminated or more than two years old.


  1. Drain the coolant until the level of the coolant is below the level of the thermostat.
  2. Raise the vehicle and support it with jack stands.
  3. Disconnect the lower radiator hose from the water inlet connection.
  4. Unfasten the two water inlet connection retaining bolts and remove the water inlet connection.
  5. Remove the O-ring seal and thermostat from the water inlet connection. Inspect the O-ring for damage and replace as necessary.
To install:
  1. Clean the water inlet connection mating surfaces.
  2. Install the O-ring, thermostat and the water inlet connection. Refer to Figure 10 if you can't remember how the O-ring and thermostat are positioned.
  3. Install the water inlet connection assembly retainers and tighten them to 71-106 inch lbs. (8-12 Nm).
  4. Connect the lower radiator hose to the water inlet connection.
  5. Fill the engine with coolant, start the engine and check for leaks.
  6. Stop the engine and top off the coolant recovery reservoir as necessary.

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Exploded view of the water inlet connection and the thermostat assembly-3.0L DOHC engines

Jun 02, 2010 | 1999 Mercury Sable

3 Answers

Heater not warming up


Check the fuses. My heater went out so I changed the fuses and it works perfectly now!

Feb 13, 2010 | 1994 Mercury Sable

2 Answers

Where is the thermostat sensor


Both the 4.0L and 4.7L engines use 195� thermostats for all model years from 1999-2004. When replacing a thermostat it is very important to install one with the same temperature rating (the only exception might be with certain performance modifications or chips that recommend or require a different temperature thermostat).

4.0L engine - Draining the cooling system WARNING: DO NOT REMOVE THE CYLINDER BLOCK DRAIN PLUGS OR LOOSEN THE RADIATOR DRAINCOCK WITH SYSTEM HOT AND UNDER PRESSURE. SERIOUS BURNS FROM COOLANT CAN OCCUR.

1. DO NOT remove radiator cap first. With engine cold, locate radiator draincock on the right lower side of radiator facing to rear of vehicle.
2. Attach one end of a hose to the draincock. Put the other end into a clean container. Open draincock and drain coolant from radiator. This will empty the coolant reserve/overflow tank. The coolant does not have to be removed from the tank unless the system is being refilled with a fresh mixture. When tank is empty, remove radiator cap and continue draining cooling system. To drain the engine block of coolant, remove the cylinder block drain plug, located on the side of cylinder block below the exhaust manifold.

4.0L engine - refilling the cooling system Coolant recommendations and cautions: The recommended mixture is 50/50 ethylene-glycol and low mineral content water. Never use pure antifreeze. Only Mopar Antifreeze Coolant, 5 Year/100,000 Mile Formula (glycol base coolant with corrosion inhibitors called HOAT) is recommended. This coolant offers the best engine cooling without corrosion when mixed with 50% distilled water. Antifreeze mixture must always be at least 44%, all climates year round. Maximum protection (-90d) is provided with a 68% mixture protection. If the percentage is lower than 44 percent, engine parts may be eroded by cavitation, and cooling system components may be severely damaged by corrosion. CAUTION: Mopar Antifreeze/Coolant, 5 Year/100,000 Mile Formula (MS-9769) may not be mixed with any other type of antifreeze. Mixing of coolants other than specified (non-HOAT or other HOAT), may result in engine damage that may not be covered under the new vehicle warranty, and decreased corrosion protection.

CAUTION: Do not use coolant additives that are claimed to improve engine cooling. 4.0L coolant capacity: 1999-2000: 13.0 qts. (including 2.3 qts. for resevoir) 2001-2004: 15.0 qts. (including 1 qt. for resevoir)

1. Tighten the radiator draincock and the cylinder block drain plug(s) (if removed).
2. Fill system using a 50/50 mixture of ethyleneglycol antifreeze and low mineral content water. Fill radiator to top and install radiator cap. Add sufficient coolant to the reserve/overflow tank to raise level to FULL mark.
3. With heater control unit in the HEAT position, operate engine with radiator cap in place.
4. After engine has reached normal operating temperature, shut engine off and allow it to cool. When engine is cooling down, coolant will be drawn into the radiator from the reserve/overflow tank.
5. Add coolant to reserve/overflow tank as necessary. Only add coolant to the reserve/overflow tank when the engine is cold. Coolant level in a warm engine will be higher due to thermal expansion. To purge the cooling system of all air, this heat up/cool down cycle (adding coolant to cold engine) must be performed three times. Add necessary coolant to raise tank level to the FULL mark after each cool down period.

For more details, you can refer to the Jeep WJ Service Manual Section-07-Cooling-System-Ewj7

Hope helped.

Nov 02, 2009 | 1999 Jeep Grand Cherokee

1 Answer

What antifreeze do I use in my 1999 mercury sable?


If you have green in it already any one will work.. Just don;t use DEXCOOL. Its for GM's

Jul 30, 2009 | 1999 Mercury Sable

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