This is the first time the engine shut engine off to cool and add water until I could get to coolant. Now the jeep will not turn over. Battery is holding charge. no leak in the radiator. Took to Autozone and Checkers and it is not pulling ANY codes! Help! The crank shaft sensor was changed out a year ago.

Cooling fans not turning on, check to make sure the cooling fans are running when overheating occurs. Not enough coolant in the cooling system, check the coolant reservoir make sure the coolant is at at the maximum level when combustion engine is completely cool,if your coolant is low add coolant to the maximum level. (1)Start combustion engine, let it warm up but not over heat. Turn off combustion engine, when it cools completely the coolant reservoirs level will be lower . Add more coolant and keep repeating (1) until the coolant level stays the same after combustion engine completely cools down.Sensor that tells the cooling fans to turn on defective. Non functioning thermostat. Broken impeller inside Water Pump. Clogged radiator. Clogged water jackets in combustion engine. Broken drive belt. Radiator has something blocking the cooling fins(possibly a plastic bag that went against the cooling fins when driving)

You should have a vacuum puller, but alternatively, you can purge it by letting in freon on the low side and opening the high side for about 4 seconds, that should purge all the air in the system.

Raise the car front end as high as possible with a floor jack, fill the coolant tank to the top, run the engine until it reaches just short of overheating, shut it down and run water over the radiator, this will burp the air out. Repeat as needed. Don't let the coolant recovery tank run dry during procedure.

you need to replace thermostat and radiator cap.look under hood around engine compartment.look for a radiator cap near radiator,add 50/50 antifreeze and water to coolant system to bring up boiling point.pure water will cause engine run hotter because water evaporate away,remove radiator pour coolant in the radiator until coolant stop dropping in the radiator now some vechicle pour coolant in the coolant overflow jug,pour coolant until coolant level stop dropping and the coolant level stay at cold full mark.start engie let idle few minutes, watch coolant level in radiator if coolant start dropping add more coolant, when coolant level stop dropping put radiator cap back on let engine idle until both top radaitor hose and bottom coolant hose get warm turn off engine wait until it get cool then take a large rag slightly open radiator just a litle at a time to keep from getting scaled.once radiator remove add more coolant if low,put radiator cap back on start the engine let it idle watch the temp gauge if temperature gauge going hot zone stop engine wait until cool then add more coolant,keep doing this until engine stop overheating going into hot zone and coolant level stop dropping,make the coolant overflow jug coolant level stay at full cold mark, dont let jug run empty if so air will get in the coolant system causing engine to overheat.

REPLACE THERMOSTAT IF TOP COOLANT COOLANT HOSE GOING TO RADIATOR IS HOT TO TOUCH THERMOSTAT OPEN. TO BLEED COOLANT SYSTEM FIRST YOU NEED TO ADD COOLANT TO THE COOLANT OVER FLOW JUG UNTIL COOLANT LEVEL STOP DROPPING AND STAY AT FULL COLD MARK.WAIT 3 MINUTES IF COOLANT DROPS ADD MORE COOLANT UNTIL COOLANT STAY AT FULL COLD MARK.WITH RADIATOR OVER CAP OFF CRANK ENGINE FOR MINUTE WATCH COOLANT LEVEL AT OVERFLOW JUG.IF COOLANT DROPS ADD MORE COOLANT IN THE OVERFLOW JUG.WHEN COOLANT LEVEL STOP DROPPING IN OVERFLOW JUG.SCREW BACK ON THE RADIATOR CAP TO OVERFLOW JUG.WHILE ENGINE IDLING WATCH TEMPERATURE GAUGE WHEN TEMPERATURE START CLIMBING TURN OFF ENGINE WAIT A WHILE KEEP FROM GETTING SCALDED.WHEN COOLANT COOL DOWN SOME. PLACE A LARGE RAG OVER THE COOLANT OVERFLOW JUG OPEN CAP LITTLE AT A TIME UNTIL PRESSURE RELEASED, THEN REMOVE CAP ADD MORE COOLANT IN THE OVERFLOW JUG TO THE FULL COLD MARK.THEN REPEAT THE PROCESS SCREW BACK ON THE COOLANT OVERFLOW RADIATOR PRESSURE CAP.THEN START ENGINE WATCH TEMPERATURE GAUGE WATCH COOLANT TEMPERATURE GAUGE WHEN COOLANT TEMPERATURE START RISING TURN OFF ENGINE AGAIN WAIT UNTIL ENGINE COOL DOWN ENOUGH TO KEEP FROM GETTING SCALDED TAKE PLACE LARGE RAG OVER RADIATOR CAP WHICH IS THE COOLANT OVERFLOW JUG CAP OPEN CAP LITTLE AT A TIME UNTIL PRESSURE RELEASED ADD COOLANT UNTIL AT FULL COLD MARK. WHEN YOUR COOLANT LEVEL STOP DROPPING.AND TOP RADIATOR HOSE VERY HOT THERMOSTAT OPEN AND AIR IS OUT THE COOLANT SYSTEM. MAKE SURE YOUR COOLANT OVERFLOW JUG HAS COOLANT IN IT,WHEN ENGINE COOL DOWN CHECK COOLANT OVERFLOW JUG KEEP COOLANT LEVEL AT FULL COLD MARK.BECAUSE IF OVERFLOW JUG IS EMPTY THATS A SIGN RADIATOR COOLANT LEVEL LOW.WHEN OVERFLOW JUG EMPTY IT WILL ALLOW AIR GET IN THE COOLANT SYSTEM AND CAUSE CAR TO OVERHEAT.WHEN REPLACING THERMOSTAT ALSO REPLACE THE RADIATOR CAP ON THE COOLANT OVERFLOW JUG.

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Removal & Installation

1. Note the radio security code and station presets.
   
2. Disconnect the negative battery cable.
   
3. Drain the coolant from the radiator, into a suitable container.
   
4. Remove the timing belt. Refer to the Timing Belt replacement in this section for specific details.
   
5. On Odyssey models with the V6 engine, remove the timing belt tensioner. Refer to the Timing Belt replacement in this section for specific details.
   
6. Remove the bolts that attach the pump to the cylinder block.
   
7. If available, locate the two 6.0 mm x 1.0 mm threaded holes opposite from one another on the outer perimeter of the water pump.
   
   • Install by hand, two 6.0mm x 1.0mm bolts at least 1 in. (25mm) long, until resistance is felt.
     
   • Simultaneously turn each bolt one turn at a time until the water pump can be released from the engine block.
     
8. Remove the water pump.
   

Exploded view of the water pump mounting-be sure to replace the O-ring during assembly

If available, use the two 6.0 mm x 1.0 mm threaded holes on the water pump to release the pump from the engine block

Make sure the water pump O-ring is fully seated in the water pump. Using a non hardening gasket sealant will help to hold the seal in place during assembly

To install:

1. Inspect and clean the O-ring mating surface on cylinder block.
   
2. Install a new O-ring on the water pump. Apply a non-hardening gasket sealant between the water pump O-ring and the pump to hold the O-ring in place during assembly.
   
3. Install the water pump onto the cylinder block and tighten the bolts to 106 inch lbs. (12 Nm).
   
4. On Odyssey models with the V6 engine, install the automatic timing belt tensioner, with the tensioner fully retracted using the special tool 14540-P8A-A01 or equivalent. Refer to the Timing Belt replacement in this section for specific details.
   
5. Install the timing belt.
   
6. On 4-cylinder Odyssey models, open the cooling system bleed bolt located on the thermostat housing.
   
7. Set the heater to the full hot position.
   
8. Refill the radiator with a coolant mixture containing 50% antifreeze. Use only antifreeze formulated to prevent the corrosion of aluminum parts. Fill the radiator with the coolant solution.
   
9. On 4-cylinder Odyssey models, fill with coolant until the bleed bolt is free of air bubbles. Then, tighten the bleed bolt to 88 inch lbs. (10 Nm).
   
10. Install the radiator cap loosely.
    
11. Reconnect the negative battery cable.
    
12. Run the engine until the cooling fans cycle two times.
    
13. Turn the engine OFF and top off the cooling system as necessary.
    
14. Install the radiator cap and check for coolant leaks. Be sure the cooling fan turns on.
    
15. Recheck the coolant level and add more if necessary.
    
16. Enter the radio security code.
    

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Welcome to FIxYa.com

How to Fill Coolant

If the coolant system has been flushed, first add 100 percent ethylene glycol in

the amount listed for the appropriate engine application. Then slowly add clean

water to the system until the level of the coolant mixture has reached the base-of

the radiator neck. Wait for two minutes and recheck the level of the coolant

mixture. add clean water if necessary to restore the coolant mixture level to the

base of the radiator neck

When refilling the engine cooling system, add three engine coolant supplement

sealant pellets, GM RN 3634621 or equivalent, and GM approved new Ethylene

Glycol Coolant DEX-COOL GM RN 9985809.

If the cooling system is being refilled ONLY (no flush), a 50 percent ethylene

glycol and 50 percent clean water mixture should be used to fill the system. Fill

the system until the level of the 50150 mixture has reached the base of the radiator

neck. Wait two minutes and recheck the level of the coolant mixture. add a 50/50

ethylene glycol water mixture as necessary to restore the coolant mixture level to

the base of the radiator neck.

Install the radiator cap making certain the arrows line up with the overflow tube.

Close all air bleeds. DO NOT over torque the air bleed valve. The air bleed valve is

made out of brass.

Fill the coolant reservoir with a 50 percent ethylene glycol and a 50 percent clean

water coolant mixture. The proper amount of this mixture to be installed into the

coolant reservoir is listed below:

Add 0.65 liters (0.68 quarts) of a 5010 mixture of ethylene glycol and clean water

to the coolant recovery reservoir.

CAUTION: The low coolant indicator lamp may come on after this procedure. After

operating the vehicle so that the engine heats up and cools down three times. if at

any time the "TEMP' warning indicator comes on. Immediate action is required.

Air bleed vent is at the thermostat house

Thank you for using FixYa.com

Regards, Lee Davidian

TO BLEED COOLANT SYSTEM.ALL YOU HAVE TO DO IS FILL RADIATOR WITH COOLANT UNTIL ITS JUST BELOW THE CAP.CRANK CAR UP LET ENGINE IDLE UNTIL IT WARM UP UNTIL THERMOSTAT OPEN UP.ADD COOLANT UNTIL COOLANT LEVEL STOP DROPPING WHEN COOLANT STOP DROPPING YOUR COOLANT LEVEL IS CORRECT AIR BLEED OUT.BECAREFUL DONT GET SCALDED.WHEN ENGINE GETS HOT WAIT UNTIL IT COOLS BEFORE REMOVING RADIATOR CAP.USE A LARGE RAG OVER RADIATOR CAP OPEN CAP A LITTLE AT A TIME THIS WAY YOU WONT GET SCALD.

Does your car have a cap or a sealed unit? You don't want a sealed unit. You want to be able to check your water.Push down and Twist the cap off when cold, not hot, fill it up with coolant, 50/50 mix, and fill up the expansion tank. It says coolant on it. The car will balance itself out. Check the water in your battery while you are at it. It dries out too. Then check the brake fluid, power steering fluid, and oil. That should keep you busy next Saturday. Hope this helps.

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.