Question about 1999 Chevrolet Cavalier

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Coolant leak i have one of these cars and i just replaced the water air outlet now i see coolant leaking from the back of the engine can anyone tell me where it is coming from

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  • SheeB Nov 25, 2008

    I have also a '99 Cavalier 2.2L which is the 2200, are the head gaskets still an issue with this motor?

    In the morning after the car sits overnight I have a little puddle which appears to be coming from the firewall/rear area of the motor. I checked the around from the top of the motor and all the hoses are good, rad, coolant reservoir, cap good too. Did not see anything really wet with orange coolant. I did replace the water pump a year ago and noticed the weep hole is facing upwards, this supposed to be actually pointed downwards?

  • ms lou Feb 19, 2009

    I have to add dex coolant to the bottle every week is there a leak in the hose or jug?

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If it's a 2.2 ohv it's a head gasket. If it's a a 2.3 or 2.4 quad-4 ohc it's a water pump.

Posted on Nov 07, 2008

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1 Answer

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.

Sep 18, 2013 | 2003 Buick Regal

1 Answer

Coolant leaking from under engine 97 5.7l silverado


It is most likely the water pump, the air flow under the engine causes the coolant to go back under the truck. Fell under the front of the water pump for moisture or a slimy liquid.

Oct 26, 2012 | Chevrolet Silverado 2500 Cars & Trucks

1 Answer

How difficult is it to replace a thermostat? on a contour 1999. has the smaller engine


REMOVAL & INSTALLATION

2.0L Engine
See Figures 1 through 6

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Fig. 1: Remove the coolant recovery tank hose from the water outlet

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Fig. 2: Remove the upper radiator hose from the water outlet

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Fig. 3: Remove the three retaining bolts for the water outlet

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Fig. 4: Carefully separate the water outlet from the thermostat housing

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Fig. 5: Remove the thermostat from the housing

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Fig. 6: Make sure you replace the O-ring when installing a new thermostat

  1. Disconnect the negative battery cable.
  2. Drain and recycle the engine coolant.
  3. Remove the air intake resonators.
  4. emove the upper radiator hose and coolant recovery tank hose from the water outlet.
  5. Remove the three retaining bolts from the water outlet and remove the outlet from the thermostat housing.
  6. Remove the thermostat and O-ring from the housing.
To install:
  1. Thoroughly clean the housing and install the thermostat and new O-ring into the housing.
  2. Install the water outlet and tighten the retaining bolts to 71-97 inch lbs. (8-11 Nm).
  3. Install the upper radiator and coolant recovery tank hoses to the water outlet.
  4. Install the air intake resonators.
  5. Connect the negative battery cable.
  6. Fill the cooling system with the proper 50 / 50 mixture and start the vehicle.
  7. Bleed the cooling system and check for leaks.

Hope this helps (remember to rate and comment this asnwer).

Jan 10, 2011 | 1999 Ford Contour

1 Answer

Replacing themostat


Please see my tip at http://www.fixya.com/cars/r5929960-s_thermostat . These are generic instructions. Specific instructions for your car are provided below. please get back to me with any questions.

procedure from autozone.com:

3.4L Engine

  1. Disconnect the negative battery cable.
  2. Remove the air cleaner and duct assembly.
  3. Partially drain the cooling system into a suitable container, to a level below the thermostat.
  4. Disconnect the radiator hose from the coolant outlet.
  5. Unfasten the coolant outlet retaining bolts.
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Fig. Fig. 3: Unfasten the bolts and remove the coolant outlet

  1. Remove the outlet, then remove the thermostat.


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Fig. Fig. 4: Once the outlet is removed, you can remove the thermostat

  1. Thoroughly clean the gasket mating surfaces.

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Fig. Fig. 5: Location of thermostat housing and outlet on engine.



To install:

  1. Install the new thermostat with the pellet towards the engine.
  2. Install the outlet to the intake manifold. Apply RTV sealant to the housing bolts and tighten to 18 ft. lbs. (25 Nm)
  3. Reconnect the radiator hose to the thermostat coolant outlet.
  4. Install the air cleaner and duct assembly.
  5. Refill the coolant and check for leaks.

When adding coolant, it is important that you use DEX-COOL® (orange colored, silicate-free) coolant. If silicate coolant is added to the system, premature engine, heater core or radiator corrosion may result. In addition, the engine coolant will require change sooner.
  1. Connect the negative battery cable.

Dec 08, 2010 | 1999 Chevrolet Venture

1 Answer

Change thermostat


Hi, you have to follow the instruction below to remove and replace the thermostat....
Removal
  • Disconnect the negative battery terminal with a socket wrench. Always use a socket wrench or close-ended wrench on the battery connector so you don't ruin the head of the bolt.
  • Drain antifreeze from the cooling system. The simplest way to do this is to have the vehicle on jack stands. Open the radiator cap to relieve pressure -- make sure the engine is cool before you do this. Use a bucket or pan to catch coolant under the radiator. Open the radiator drain on the bottom of the radiator with pliers or by hand. The 3.1L engine has an air bleed valve on the throttle body which you should open two turns.
  • Remove the drain plugs located on the underside of the block just above the oil pan and let the coolant drain into your pan or bucket. Close all the drain plugs.
  • Unbolt the the water outlet from the thermostat, if your Cutlass has a four-cylinder engine. All other models have the water outlet on the intake manifold. Remove the outlet and the thermostat. If your Cutlass has cruise control, remove the vacuum modulator bracket from the thermostat housing.

Installation
  • Use the scraper tool to clean the surfaces where the thermostat and engine block meet. Apply a bead of RTV in the water outlet groove.
  • Put your new thermostat in place on the housing. Make sure the side with the spring goes towards the engine. Tighten the thermostat bolts with the torque wrench to the specifications provided. Remember that tightening specifications for the mounting bolts vary between parts manufacturers. If your engine has an air bleed valve near the throttle body, close that too.
  • Check that you have closed and tightened the radiator drain and the two drain plugs near the oil pan. Pour the coolant back into the radiator, adding extra coolant if necessary to fill to the base of the radiator neck. Fill the radiator overflow tank to the "FILL" mark with coolant.
  • Leave the radiator cap off, start and idle the engine. The coolant level visible in the radiator should drop slightly. Fill it back up to the base of the radiator neck. Put the radiator cap back on and make sure the arrow on the cap points towards the overflow tank. With the engine still idling, squeeze the outlet hose with your hand. The outlet hose is the big one that connects to the top of the radiator. If you feel it getting hot, this tells you the thermostat has opened up and is functioning properly.
  • Turn off the engine. Check for leaks on hose fittings and around the drains. Check that the hoses all appear sound and that none are leaking or cracked.

Dec 06, 2010 | 1996 Oldsmobile Cutlass Ciera

2 Answers

I need to replace the thermostat it is sticking


DRAIN COOLANT LEVEL DOWN BELOW THERMOSTAT.PLACE DRAIN PAN UNDER VECHICLE TO CATCH ANTIFREEZE.WHEN DONE PUT ANTIFREEZE SAFE PLACE FROM KIDS AND ANIMALS.WHEN DONE DRAINING SOME ANTIFREEZE.FOLLOW RADIATOR HOSE TO TOP OF INTAKE TO THERMOSTAT HOUSING. LOOSEN HOSE CLAMP REMOVE RADIATOR HOSE FROM THERMOSTAT HOUSING.THEN LOOSEN HOUSING BOLTS.REMOVE THERMOSTAT HOUSING AND THERMOSTAT.CLEAN BOTH THE THERMOSTAT HOUSING SURFACE AND INTAKE SURFACE YOU CAN USE ACETATE OR BRAKE CLEANER AND SCOTCH BRITES ROLL OF CLEAN PAPER TOWEL. AFTER CLEANING HOUSING AND INTAKE SURFACE MAKE SURFACE CLEAN SMOOTH FROM THE DEBRIS WHEN DONE. TAKE THERMOSTAT PUT GASKET SEALER ON BOTH SIDES OF GASKET PUT GASKET TO THERMOSTAT HOUSING MAKE SURE GASKET AND THERMOSTAT HOUSING HOLES ALIGN CORRECTLY.NOW PLACE NEW THERMOSTAT IN PLACE IN THE INTAKE.MAKE SURE THERMOSTAT SPRING END GOES TOWARD ENGINE FACING DOWN.THEN INSTALL THERMOSTAT HOUSING WITH GASKET TO THE INTAKE.TORQUE THERMOSTAT HOUSING BOLTS TO 20 FT LBS.WAIT 1 HOUR BEFORE POURING ANTIFREEZE BACK IN THE COOLANT SYSTEM GIVE THERMOSTAT GASKET SEALER LITTLE TIME TO CURE.SO YOU WONT HAVE COOLANT LEAKS.NOW IF THERMOSTAT HAS THE LARGE O- RING ON IT YOU DONT HAVE A THERMOSTAT HOUSING GASKET THE THERMOSTAT O- RING IS THE SEAL THAT HOLDS COOLANT INSTEAD OF GASKET.WHEN THERMOSTAT AND HOUSING IN PLACE.INSTALL RADIATOR HOSE TO THERMOSTAT HOUSING TIGHTEN HOSE CLAMP.THEN FILL RADIATOR BACK UP WITH THE COOLANT YOU DRAIN OUT.START VECHICLE UP. THEN CHECK FOR LEAKS.

Nov 03, 2010 | 1992 Buick LeSabre

2 Answers

How to replace a themostat on a 2004 Gmc Envoy


Please see my tip at http://www.fixya.com/cars/r5929960-s_thermostat .

Specific instructions for your car are as follows. Let me know if you get stuck or have more questions.


Removal & Installation


4.2L Engine

  1. Remove the necessary coolant from the radiator.
  2. Remove the alternator, as outlined in the Engine Electrical Section.
  3. Loosen the outlet hose clamp at the thermostat housing. Remove the outlet hose from the thermostat housing.
  4. Remove the thermostat housing bolts.
  5. Remove the thermostat housing from the engine block.
  6. Clean all of the surfaces of the thermostat housing.
  7. Clean the sealing surface of the engine block.
To install:
  1. Install the thermostat housing to the engine block.
  2. Install the thermostat housing bolts and tighten to 89 inch lbs. (10 Nm).
  3. Lubricate the inner diameter of the radiator hose with engine coolant.
  4. Install the outlet hose to the thermostat housing. Secure the hose with the clamp.
  5. Install the alternator.
  6. Fill the cooling system with specified coolant and concentration.
  7. Inspect all sealing surfaces for leaks after starting the engine.

5.3L Engine
NOTE The thermostat is not serviceable separately. The water pump inlet and thermostat must be replaced as an assembly.


  1. Drain the cooling system to a level below the thermostat.
  2. Remove the radiator outlet hose.
  3. Remove the water pump inlet bolts.
  4. Remove the water pump inlet and thermostat from the water pump.

To install:
  1. Install the thermostat and thermostat housing to the water pump.
  2. Install the thermostat housing bolts. Tighten the bolts to 11 ft. lbs. (15 Nm).
  3. Install the radiator outlet hose.
  4. Properly fill the engine cooling system and check for leaks.

Oct 08, 2010 | 2004 GMC Envoy

1 Answer

How do u change a thermostat in a 99 buick la sabre, there is only cold heat coming out of the heater


The thermostat is used to control the flow of engine coolant. When the engine is cold, the thermostat is closed to prevent coolant from circulating through the engine. As the engine begins to warm up, the thermostat opens to allow the coolant to flow through the radiator and cool the engine to its normal operating temperature. Fuel economy and engine durability is increased when operated at normal operating temperature.


REMOVAL & INSTALLATION
CAUTION Never open, service or drain the radiator or cooling system when hot; the system is under pressure and will release scalding hot coolant and steam which can cause severe burns and other bodily harm. 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.
  1. If necessary, unfasten the retainer and remove the upper engine cover.
  2. Disconnect the negative battery cable.
  3. Remove the air cleaner and duct assembly.
  4. Partially drain the engine cooling system, into a suitable container, to a level below the thermostat.
  5. Disconnect the upper radiator hose from the water outlet.
  1. If necessary, detach the electrical connections from the throttle body assembly.
  2. Unfasten the water outlet attaching bolts, then remove the water outlet.
  1. Remove the thermostat. Remove and discard the gasket.
  1. Thoroughly clean the manifold water inlet and water outlet mating surfaces. Inspect the water outlet for corrosion or other damage, and replace if necessary.
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Fig. 8: Exploded view of the thermostat and housing assembly - 3.8L (VIN C) engine

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Fig. 9: Thermostat and water outlet mounting - 3.8L (VIN L) engine shown

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Fig. 10: Exploded view of the thermostat, gasket and housing assembly - 1997 vehicle shown

To install:

  1. Position the thermostat into the intake manifold with a new gasket.
  2. Install the water outlet to the intake manifold with RTV sealer. Tighten the attaching bolts to 20 ft. lbs. (27 Nm).
  3. Connect the radiator hose to the water outlet housing.
  4. If necessary, attach the electrical connections to the throttle body assembly.
  5. Install the air cleaner assembly, then connect the negative battery cable.
  6. Refill the engine with the specified type and amount of engine coolant. Start the engine and check for coolant leaks.

I hope this helps; remember to rate this post. Good luck.

Oct 05, 2010 | 1999 Buick LeSabre

1 Answer

2005 Dodge Stratus Coolant Outlet Flange


The water outlet housing if installed properly, shouldn't leak. The only way to build up too much pressure would be for the thermostat to be stuck closed. I would find out where the leak is coming from before I went any further. Use the bleeder screw in the housing to bleed the air out of the system.

Aug 25, 2009 | 2005 Dodge Stratus

3 Answers

1999 grand am


'99 Grand Am have a plastic water outlet located on the back of the engine. (Same side as the battery). It is installed using a thin O-ring. Antifreeze is corrosive and weakens the O-ring causing a leak. Because of the location the leak can be almost undetectable. Replace the O-ring, but becareful not to break the water outlet.

Aug 20, 2008 | 1999 Pontiac Grand Am GT

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