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What causes coolant leak on 06 Sedona under the thermostat housing area?

Coolant drips onto ground below engine. Looks like its source is somewhere under the large casting that house the thermostat. Dealer wants to do upper & lower rad hoses and thermostat and flush but one of those two hoses was already replaced so I'm leery of the $500 they want to do this with no guarantee it will solve the leak. Is there any history of leaks around this thermostat housing? THX - 5 bills is going to be major hurt at this time, especially if it doesn't solve the problem.

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Posted on Jan 02, 2017

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SOURCE: leak around a flange for coolant in a 2004 sorento

I also have a 04 sorento. Make sure they check to see if the butterfly gasket has not been sucked into the intake. My motor went because of this but that was back at 42k I now have 80k . They never did a recall on this because it was 1in10,000 that had this problem. they did pay for everything

Posted on Feb 06, 2009

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emissionwiz
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SOURCE: I have a 2005 Kia Sedona the coolant is leaking from the upper radiator hose, but my temperature gauge doesn't indicate overheating, what could be the problem?

Defective hose?

Posted on Jul 09, 2012

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2 Answers

2005 kia sedona engine coolant sensor


The Engine Coolant Temperature (ECT) Sensor is located in the thermostat housing of the cylinder head.


2005-kia-sedona-engine-coolant-sensor-ir03o0ur3ff3pxc4zrfsqvc4-3-0.jpg

Jul 26, 2012 | 2005 Kia Sedona

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Changed water pump,thermostat, top rad. hose. still leaking leaking antifreeze from what looks like below thermostat housing. have noticed super small hose from water pump to engine. looks hard to replace....


That is called the bypass hose. It could be leaking but I'd take a closer look at the thermostat housing. If you replaced only the thermostat and not the housing, the housing may be leaking. It's a common source of coolant leaks.

Apr 16, 2011 | 2000 Dodge Ram 1500 Truck

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I have to put antifreez in car everyday just topping off thats it where can the leak be


Coolant can be leaking from the hoses, eater pump seal, thermostat or water inlet/outlet seals, radiator or heater core. If you don't see coolant drilling onto the ground it is because of one of two reasons. The leaking coolant is dripping onto hot engine and exhaust parts and evaporating before it hits the ground, or you are leaking coolant internally through a bad head gasket.

Mar 12, 2011 | Pontiac Bonneville Cars & Trucks

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06 chevy.Impala running hot,i install a new radiator and fill with dexcol ilet run 30sec. later it run hot. how do i bleed the air out


DID you change out the Thermostate? the thermostate will open at around 180 degrees to cool off the motor if it fales to open it will make the car run hot. REPLACEMENT BELOW $40.oo range.

  • Open the hood of the impla and locate the thermostat housing. Find the largest hose at the top of your radiator, then follow it until it connects onto a portion of the Impala's engine block. The piece that to which the hose connects is the removable thermostat housing.

  • 2

    Use a jack to raise the Impala off the ground, then settle it down onto jack stands. Make sure the car is in park and the emergency brake is on.

  • 3

    Place a large container under the Impala's radiator. Drain the radiator into the bucket by loosening the clamp on the lower coolant hose with a flat-blade screwdriver, then removing the hose entirely so that the coolant flows into the bucket. Once the coolant stops flowing, set the bucket aside.

  • 4

    Use the screwdriver to loosen the clamp on the coolant hose connecting to the thermostat housing, then remove the hose from the housing completely. This will give you access to the bolts securing the housing to the Impala's engen block

  • 5

    Use a wrench or ratchet and sockets to remove the bolts securing the housing to the engine block, then set them aside somewhere where you will not lose them. Loosen and remove the thermostat housing to reveal the thermostat.

  • 6

    Make a careful note of how the thermostat is oriented toward the Impala's engine block. You must install the new thermostat in the exact same way as the old one is installed. Remove and discard the old thermostat.

  • 7

    Use a scraper tool or a razor blade to remove any remaining bits of thermostat gasket from the bottom of the thermostat housing and from the engine block. It is important to get all the remains off; otherwise the new gasket will not seal properly.

  • 8

    Apply a layer of gasket sealant to the bottom of the Impala's thermostat housing, then press the new gasket against the sealant so that it sticks and makes a good seal.

  • 9

    Install the new thermostat in the manner you noted in Step 6, then replace the thermostat housing and secure it down with the bolts. Reconnect the hoses you disconnected--making sure that the clamps are tightened down so no coolant leaks--and refill the Impala's radiator with the coolant you drained out earlier. Use your jack to lower the Impala back to the ground.

  • Dec 05, 2010 | 2006 Chevrolet Impala

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    My 1999 Alero must have a leak somewhere because the thermostat gauge rises every few days. I put coolant in it at least 1 a week. I had a new water pump and thermostat put on it, but it is still...


    CHECK AROUND WATER PUMP AREA.AND THERMOSTAT HOUSING FOR LEAKS.THE MECHANIC WHO PUT THE WATER PUMP ON MAY FORGOT TO PUT SEALANT ON BOTH SIDES OF THE WATER PUMP GASKET CAUSING LEAKS.LOOK AROUND THERMOSTAT HOUSING FOR LEAKING.IF THERMOSTAT SEAL WAS DAMAGE DURING INSTALLATION IT WILL CAUSE LEAKING.IF ALL LOOKS GOOD CHECK FOR COOLANT LEAKS AROUND RADIATOR .CHECK RADIATOR TOP AND BOTTOM HOSES FOR LEAKS AND CHECK HEATER PIPES AND HEATER CORES HOSES FOR LEAKS.IF ALL HOSES GOOD.CHECK FOR LEAKING CORE PLUGS.

    Sep 26, 2010 | 1999 Oldsmobile Alero

    1 Answer

    How to replace a thermostat 1996 mazda mellinia


    Thermostat - REMOVAL & INSTALLATION

    CAUTION When draining the coolant, keep in mind that cats and dogs are attracted by the ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.
    1.5L, 1.6L, 1.8L (except K8) and 2.2L Engines
    1. Disconnect the negative battery cable. Drain the radiator to below the level of the thermostat.
    2. If necessary, remove the air cleaner assembly.
    3. If necessary, disconnect the coolant temperature switch at the thermostat housing.
    1. Remove the upper radiator hose.
    2. Remove the mounting nuts, thermostat housing, thermostat and gasket.
    Do not pry the housing off.


    To install:
    1. Clean the thermostat housing and the cylinder head mating surfaces.
    2. Insert the thermostat into the rear cylinder head housing with the jiggle pin at the top. The spring side of the thermostat should face the housing.
    3. Position a new gasket onto the studs with the seal print side facing the rear cylinder housing.
    4. Install the thermostat housing and 2 nuts. Tighten the nuts to 14-22 ft. lbs. (19-5 Nm).
    5. Install the upper radiator hose.
    6. If detached, connect the coolant temperature switch.
    7. If removed, install the air cleaner housing.
    8. Fill the cooling system. Connect the negative battery cable, start the engine and check for leaks. Check the coolant level and add coolant, as necessary.


    2.0L Engine
    See Figures 3, 4, 5, 6, 7, 8, 9 and 10
    1. Disconnect the negative battery cable.
    2. Drain the engine coolant from the radiator to below the level of the thermostat.
    1. Disconnect the lower radiator hose from the engine.
    2. Remove the housing bolts, thermostat housing, thermostat and gasket.
    Do not pry the housing off.


    To install:
    1. Clean the thermostat housing and the cylinder head mating surfaces.
    2. Make sure that the thermostat jiggle pin is aligned with the gasket projection.
    3. Install the thermostat to the housing. Align the gasket projection with the opening in the housing. The spring side of the thermostat should face into the housing.
    4. Install the thermostat housing cover and tighten both bolts to 14-19 ft. lbs. (19-25 Nm).
    5. Fill the cooling system. Connect the negative battery cable, start the engine and check for leaks. Check the coolant level and add coolant, as necessary.

    Hope helps (remember rated this).

    Jul 08, 2010 | 1996 Mazda Millenia

    1 Answer

    2001 Oldsmobile Alero Temperature goes high - alarm sounds - steaming from under hood. Losing coolant. Have already replaced the Temp Sending unit, the Thermostat, and the Water Pump.


    I would have someone pressure test the cooling system to determined if there is an external or internal leak somewhere as it sound like you have one or the other. An internal leak, such as a head gasket, won't show up as a dripping coolant but will cause coolant to be forced out of the coolant reserve tank in a kind of bubbly burp as the engine warms up while an external leak usually can be spotted by following the trail of leaking coolant back to it's source. I would suggest having it checked out as soon as possible as serious engine damage can result from even a fairly short time spent overheating.

    Jul 05, 2010 | 2001 Oldsmobile Alero

    2 Answers

    2002 dodge caravan leaking coolant looks like from under engine


    There are no coolant lines etc running on the lower part of the engine. Usually water will leak from above and run down finally dripping from under the engine. Coolant will not leak from the "engine" it leaks from a hose or thermostat housing.

    Start from the top and work down. Check each hose by feeling with your hand. Look for a wet spot. wipe the hosed with a cloth to clean if necessary. If you think you found it dry the area and check again. Sometimes you need to move the hose around to open a small tear and expose the leak source.

    If a hose leak tighten the clamp. If torn hose you may be able to disconnect, cut the end and reattach. If too short replace.

    Check where each hose connects to the engine. This will be the thermostat housing and the heater supply line. If a housing try gently tightening (careful they crack). Or replace the gasket.

    If you don't see a leak at all. Start the engine and run. This will build pressure in the cooling system. Look for leak using the same process. Careful as the engine is hot.

    Adrian

    Mar 07, 2010 | 2002 Dodge Grand Caravan

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    I'm loosing coolant / heater does not work once coolant level is low / it's been checked by a mechanic and no leaks were found... radiator pressure is fine... what else can I do.. I' still getting low in...


    "Mystery leaks" can be very frustrating..You have a leak somewhere, guaranteed. Check all hose connections, hoses, the thermostat housing gasket, the water pump gasket, and the water pump itself (check it last). Try this: park the car overnight inside a garage immediately after driving it while it is still hot. Park it over a large piece of cardboard. Antifreeze is, among other things, oily in nature, and will stain the cardboard where the coolant drips onto it. The areas that get stained are not necessarily the area from which the coolant leaks--water travels along various surfaces until it reaches a low enough spot to drip from, But if you have a stain, even a small one, smell it...if it's antifreeze, check everything again. Sometimes you have a pinhole in a hose so small it is only open and spraying coolant when the system is at temperature and under pressure. Keep looking; you'll find it. If I helped you, please vote/comment, and good luck.

    Feb 20, 2010 | 2002 Jeep Liberty

    1 Answer

    How do you replace a thermostat on a 2002 toyota celica


    Toyota Celica, Corolla, ECHO & MR2 1999-05Toyota Celica, Corolla, ECHO & MR2 1999-05

    2002 Toyota Celica 1.8L MFI DOHC 4cyl


    The thermostat is located in the water inlet housing that is connected to the lower radiator hose.
    The thermostat is equipped with a by-pass valve. If the engine tends to overheat, removal of the thermostat would cause a decrease in cooling system efficiency.

    CAUTION NEVER drain coolant directly onto the ground! 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. Coolant should be reused unless it is contaminated or is several years old.
    d4c6b82.jpg

    Fig. The oil filter must be removed to access the thermostat on the 5S-FE engine
    1. Position a suitable drain pan under the radiator drain **** and drain the cooling system.
    2. On the 7A-FE engine disconnect the engine coolant temperature switch harness from the water inlet housing.
    de1afd5.jpg

    Fig. Disconnect the engine coolant temperature switch wiring located on the side of the thermostat housing
    1. Remove the oil filter on 5S-FE engines.
    2. Loosen the hose clamp and disconnect the lower radiator hose from the water inlet housing.
    d253a81.jpg

    Fig. Loosen the radiator hose clamp ...

    5746ade.jpg

    Fig. ... then slide the hose off the thermostat housing
    1. Remove the two nuts from the water inlet housing and remove the housing from the water pump studs.
    f78b0a7.jpg

    Fig. Only two nuts hold the housing to the cylinder head

    de736db.jpg

    Fig. Pull the housing straight out to remove
    1. Remove the thermostat and rubber O-ring gasket from the water inlet housing.
    f722bd2.jpg

    Fig. Then pull the thermostat and gasket out

    bd62248.jpg

    Fig. Sometimes the gasket is stuck and has to be pried out of the head
    To install:
    1. Make sure all the gasket surfaces are clean. Clean the inside of the inlet housing and the radiator hose connection with a rag.
    2. Install the new rubber O-ring gasket onto the thermostat. On 5S-FE engines, align the jiggle valve with the upper side of the stud bolt. Insert the thermostat into the housing.
    abce49b.jpg

    Fig. Only use the correct temperature range thermostat when for replacement

    edd75f2.jpg

    Fig. Align the jiggle valve within a 10°gap of the stud bolt-7A-FE engine

    d56a45f.jpg

    Fig. Align the jiggle valve within a 5°gap of the stud bolt-5S-FE engine
    1. Position the water inlet housing with the thermostat over the studs on the water pump and install the two nuts. Tighten the two nuts to 78-82 inch lbs. (9-10 Nm).
    Don't forget to install a new O-ring onto the water inlet pipe. Apply soapy water to the O-ring prior to installation.
    1. Connect the lower radiator hose to the inlet housing and install the hose clamp.
    2. Attach the water temperature switch connector.
    3. Install the oil filter and check the oil level if removed.
    4. Fill the cooling system with a good brand of ethylene glycol based coolant.
    5. Start the engine and inspect for leaks.
    1. Remove the right hand cover under the engine.
    2. Drain the engine coolant.
    3. Remove the fan and generator V belt.
    4. Remove the generator assembly
    5. Remove the water inlet via the two nuts.
    6. Remove the thermostat.
    To install:
    1. Install a new gasket onto the thermostat.
    2. Install the thermostat with the jiggle valve upward. It can be set within 10 degrees on either side of the prescribed position.
    3. Install the water inlet via the two nuts. Torque to 8 ft. lbs. (11 Nm).
    4. Install the generator assembly.
    5. Add engine coolant.
    6. Inspect for leaks.
    7. Replace the cover under the engine.
    I hope help you with this (remember rated this help) Good luck.

    Sep 29, 2009 | Toyota Celica Cars & Trucks

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