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Coolant leaking out of a hose that runs from coolant tank to rear of engine compartment. Not sure what this hose is attached to, but i can see coolant on outside of hose.

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  • Susan Nov 09, 2012

    I have fixed the vehicle and i thank you Ted because you helped me get on the right track


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  • Cars & Trucks Master
  • 2,101 Answers

What kind of car do you have,and it sounds like one of the heater core hoses

Posted on Nov 01, 2012

  • 4 more comments 
  • Susan Nov 02, 2012

    I have a 2001 VW Jetta GLS 2.8 liter vr6

  • Susan Nov 02, 2012

    Yesterday i was driving car and abs light and anti slip regulation light came on. Pulled over and opened hood. After a couple of minutes, with car off, a really loud squeal started going off in engine. After about a minute went off. When i restarted car, the lights were not on anymore. When i got home, i checked fluid levels and coolant was low so i put in resevoir tank. Next morning when i started car temp light started flashing. When i checked coolant level it was all gone.

  • teds repairs
    teds repairs Nov 02, 2012

    Hi jan. thank you for giving me more info. I am a self eployed mechanic. I have a facebook page. can you take a picuture of the hose plaese to the page. I will send the link

  • teds repairs
    teds repairs Nov 02, 2012

    sorry susan. for the jan. I see most of the responses here . some of the guys here are clueless.if you want you can leave me a email there

  • Susan Nov 02, 2012

    Ok...i am not sure how to post a pic here...

  • teds repairs
    teds repairs Nov 03, 2012

    you may have to send it to my facebook page


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Posted on Jan 02, 2017

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SOURCE: coolant leak on 99 Ford Taurus

I to have the same problem with the coolant leak in my 99 Ford Taurus. We have tried putting coolant in about 3 or 4 times only to have it leak out. The last thing we tried was to have some dye installed to try and find the leak with no success. My leak was not discovered until it was too late. The transmission cooling part of the radiator got a leak. It allowed coolant to get into the transmission. I was pulling away from a stop light and blew the sun gear apart in the tranny. In short, check tranny fluid. If it is milky, change the tranny fluid and get a new radiator before it's too late. Wound up costing me $2000 for a tranny. Good luck.

Posted on Oct 11, 2008

  • 142 Answers

SOURCE: 1996 Jeep cherokee, leaking coolant when cold/ hot ok.

waterpump houseing/shaft seal is on the way out hence the water/coolant, running along the block. when hot the seal does so, when cold and depressurising seal doesnt.

Posted on Jan 25, 2009

  • 102 Answers

SOURCE: coolant leak from left side of engine block running down oil pan.

when you say left side are we talking passanger side or drivers side if drivers side which is my guess most likely your waterpump seal is leaking

Posted on Mar 22, 2009

  • 71 Answers

SOURCE: coolant leak

coolant leak may be coming from intake manifold gaskets,4.3 is notorius for leaking coolant from behind the mainfold in those years

Posted on Mar 29, 2009

old marine
  • 1975 Answers

SOURCE: 2000 chevy cavalier having coolant leak. Found a

That hose is the drain hose for the air conditioner evaporator. If it is leaking coolant, there's a good chance that your heater core is leaking, as it is in the same 'box' that the air conditioner evaporator is in. You'll need to replace the heater core.

Posted on Apr 24, 2009

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My 2003 regal is running hot and slowly leaking all the coolant out. Can anybody tell me what the problem is?

Yes, you are running hot from leaking all your coolant out. No one can tell you where it is leaking without looking at it. Could be a hose leaking, the radiator, a bad head gasket or intake gasket, the water pump...if coolant is leaking from the front of the engine, that could be the water pump or radiator hose or a water pump gasket. Pretty common for the water pump to leak when it is worn out, that's how you know when to change it.

When you fill the radiator and overflow tank back up to full, does the engine still run hot? If it does, I would not advise running it-have a shop diagnose it before more serious damage occurs. Head gasket repairs can get very expensive-that is the danger you are facing, and if the head gasket has already gone bad from overheating, continued running of the engine can cause you to have to replace the engine. Overheating is a major cause of early engine failure.

Try to determine where the leak is, from where it drips off the engine. The coolant constantly circulates from the engine to the radiator and back into the engine. The heater hoses circulate coolant from the engine to the heater core in the heater case and back into the engine. Besides the overflow tank, these are the only places coolant would be on the car. The engine can leak coolant from a lot of places, but if leaking to the outside, you should be able to spot where it is coming from. Good luck.

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The Jaguar XK8 has a coolant hose on the rear of the engine that is prone to leaking. The leak is typically on the right side, right above the catalytic converter. There is a quick disconnect fitting that has an o-ring in it. This O-ring fails with age, and the coolant leaks from the connector.

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I hve water leaking from the rear of my engine on my 98 expedition

Hello moltn, quite often people completely fill their coolant reservoir, ( the plastic bottle with the cap that says, " coolant " ), If you haven't already, make sure that the coolant level in the reservoir isn't over the FULL line. When it is overfilled, and the engine runs for a few minutes, the heat builds some pressure and forces the extra coolant out through an overfill hose. That overfill hose usually drains, on the ground, in the general area your leak is comming from.
If that is NOT the problem;

Next, we need to find out if it leaks all the time, or, if it only leaks under pressure, ( when the engine is running and warmed up ).

Start the vehicle just long enough to back it up 2 or 3 feet and then turn the engine back off. Raise the hood and visually inspect the area where you seem to leaking from. Allow about 10 minutes and then look to see if you have a new puddle under the vehicle.

If it's a non-pressure leak, you should be able to spot it right away, most likely a loose hose clamp, If so, first look closely at the condition of the hose, if it looks okay go ahead and tighten the clamp, ( you often only need about 1 full turn on the screw/nut that tightens the clamp.)
As rubber hoses age they lose some of their integrity, so clamp should be checked atleast every six months.

If you find nothing leaking, it is likely a pressure leak that is often the result of the engine and coolant reaching their operating temperature and as they do the heat builds perssure and will usually force coolant out of any weak links in the cooling system.

Let the engine run 6 to 8 minutes to allow the vehicle to get to its normal operating temperature.
Look at your temperature gauge, your needle should be about in the middle. Go back and look in the engine compartment again and visually inspect for signs of leaks. You should be able to locate any pressure leaks at this point. As before, if you locate the leak, and it is at a hose, do a good visual inspection of the hose, and the clamp.

Good luck my friend!

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Replace heater core

    A heater core transfers heat from a 1994 Ford Ranger's engine to the passenger compartment by running hot radiator coolant through a serpentine of tubing. Air blows past the hot fins of the heater core and into the truck cab.

    The hoses running to and from the heater core must be removed from the engine compartment, but the core itself is accessed from inside the passenger compartment, on the driver's side next to the center console.

    1. Turn off the engine, open the hood and remove the battery cable from the negative terminal. Make sure the engine is cool.

    2. Attach a 3/8-inch interior diameter hose to the drain outlet on the bottom rear corner of the radiator on the driver's side, and place the bottom end in a resealable plastic container. Turn the drain valve (located above the drain outlet) counterclockwise with a pair of pliers. Drain the engine coolant into the resealable container, then close the valve by turning it clockwise. Remove the hose from the outlet.

    3. Loosen the hose clamps on the radiator hoses where they attach to the heater core on the firewall. Remove the hoses.

    4. Unscrew the screws holding the underdash cover in place on the driver's side of the passenger compartment. Remove the underdash cover.

    5. Unscrew the four screws on the cylindrical heater core access cover and remove it. Remove the heater core by pulling it down and toward the rear of the vehicle. Replace the unit with a new heater core.

    6. Reinstall the heater core access cover and screw in the retaining screws. Replace the underdash cover and screw it into place.

    7. Replace the radiator hoses on the heater core in the engine compartment. Tighten the hose clamps. Add coolant until the level is between the minimum and maximum marks on the reservoir.

    8. Replace the battery cable and start the engine. Check the system for leaks.

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If it was a coolant leak the cooling system would be low on coolant, and the engine would run hot when the coolant gets low.

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Coolant is draining out of coolant reservoir from bottom of reservoir side after driving the car for a few minutes. The engine was just overhauled. Did the mechanic(s) forget to attach a hose at the...

Or the coolant tank is broken! You may have to remove the tank to figure out which as the hose is hard to get to with the trank bolted down. The hose could be rotted or the cap may not be releasing buid up of pressue or the head gasket or engine casting of one kind or other may be leaking commpression presure into the cooling system. It maybe time to go back to the rebuilder and have them check their work. If they finished the job all the way it sould'nt leak and they should of run it long enough to find a proble like that and fixed it before you gotr the car back.

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