Question about 1998 Pontiac Sunfire

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Coolant is leaking from underneath the the engine, the water pump has been replaced but its still leaking about 1.8 liters of coolant per month?

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  • Expert
  • 82 Answers

Look for rusty freeze plugs.

Posted on Mar 27, 2014

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Posted on Jan 02, 2017

localwonder
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SOURCE: 2000 Sunfire coolant problem. Engine overheating,

ok, its time for a radiator flush. there is major sludge in the internals of this radiator. Make sure the thermostat is in the correct position as well. I've seen many cars come into my shop with the thermostat inserted backwards.

Posted on Mar 13, 2009

MrScary66613
  • 1990 Answers

SOURCE: 2000 Pontiac Grand Am - Coolant Leakage

You will need to Replace this Hose to Stop this Leak. There is nothing that you can put on it to stop the Leak Because the Hoses are Under Pressure. Please Rate My Response! Thanks!

Posted on Jan 31, 2009

  • 20 Answers

SOURCE: leaking coolant

These plastic elbows (3.8L Engine) do fail. To the best of my knowledge this is a dealer only item, which is not a big deal as the cost is low (in terms of car repair). Remove the alternator to gain access to the elbow. Monitor the coolant level following repair.

As you probably know, don't let the engine run low on coolant as engine damage will follow.

Posted on Nov 19, 2008

  • 1 Answer

SOURCE: Leaking coolant water

This L shaped hose is a drainage for the heater core compartment. Once we removed the panel to the heater core it was obvious the heater core was leaking into this compartment. We changed the heater core out and the problem has been solved :)

Posted on Mar 24, 2009

  • 401 Answers

SOURCE: 1997 Firebird over heating

Hi could be a thermostat or a head gasket
take the rad cap off a start the car see if there are bubbles in the rad if there are no bubbles then change the thermostat if there are bubbles then good chance it's a head gasket

Posted on May 11, 2009

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2 Answers

Why is coolant leaking from underneath the center of my cadillac deville 1997? I've replaced everything that has to do with the coolant. There is no water nor fog on the passenger side floor


Well, if the coolant is leakimg from the HVAC drain, then you need a heater core, no matter what. You really have to jack it up and look, but I can give you a couple of pointers......

1. The water pump is leaking. That happens a lot. The coolant is leaking near the front of the car, near the center, but ever so slightly towards the drivers side. You need a special tool to replace it and I think gm has an updated cover and gasket.

2. The water pump housing is leaking. The gaskets that seal it to the block are made of plastic and deteriorate often. The coolant will be leaking at the center of the car, maybe up by the water pump, or back between the engine and transmission.

3. The heater hoses. I have only seen this 2 time, but the metal pipes corrode along the fire wall.

4. You could need a radiator. I have seen the side tanks leak a few times.....


Just A couple of places to look, but you have to get under and look....

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My coolant level is dropping about two cup fulls every couple of months,there is no coolant on ground just a small water drip on garage floor after about middleways underneath engine after driving it.


There are only a few ways coolant can get out of the cooling system.
First check where the hoses connect to the radiator to make sure they are completely dry. Then check directly under radiator to make sure it isn't damp. Sometimes the radiator cap will go bad and allow some coolant to leave. You can replace the radiator cap relatively cheap. The very worst way you can be loosing coolant is thru a blown head gasket. The coolant slowly leaks into the cylinder and is burned. You would have to go to a mechanic to have this verified.

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1 Answer

Coolant leak from underneath


if you have a coolant or antifreeze mixed with the water, you should see a trace of the coolant on the motor, where it is leaking. check water hose clamps and water pump. if the water pump is leaking slowly, it has failed and will break within time. any coolant leak will cause your car engine to overheat.

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1998 Oldsmobile Silhouette overheating


Is it leaking antifreeze underneath the engine at all when it sits overnight? If so I would say the water pump is shot. If it isn't leaking, it could still be the water pump but it might(hopefully) just need a new thermostat. And driving it when it's hot like that to the point where it starts to run rough means you run it too much like that and your engine will blow up and there is probably already damage. So check it out before driving it to much more.

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Hi. 2005 Impala 3.4. My water pump is failing for the second time in two years. Coolant flushed after first pump installed. Coolant flushed again six months ago. Pump is failing again. Thermostat...


WATER PUMP FAILURE COULD BE CAUSED BY WRONG COOLANT USE DEX COOL ANTI FREEZE.REPLACE THERMOSTAT AND BOTH RADIATOR HOSES TOP HOSE AND BOTTOM HOSE.SOFT HOSES COLAPSE LIKE PUMP HOSE.IT WILL COLAPSE FROM PUMP VACUUM CLOSING OFF SOME COOLANT FLOW.MAKE THE HEATER CORE NOT STOPPED UP IF SO IT WILL RESTRICT WATER PUMP BYPASS CAUSE EARLY PUMP FAILURE.YOU NEED 50/50 COOLANT MIXTURE YOU HALF WATER AND HALF DEX COOL DONT USE GREEN ANTI FREEZE USE ORANGE DEX COOL.I HAVE 3.4L ENGINE AND 3.1L ENGINE BEEN USING DEX COOL ANTI FREEZE SINCE I HAD BOTH VECHICLES. HAD NO WATER PUMP PROBLEMS.

Jan 23, 2011 | 2005 Chevrolet Impala

1 Answer

Antifrezz is leaking from the engine no hoses are broke whers is it coming from


If all your hose and hose clamps are good. There is a good chance that the water pump has to be replaced, once the water pump bearing is worn. The coolant will leak from the weep hole on the water pump when the engine is running and the only way to stop the leak is to replace the water pump.
Thank you for using fixya.
Depending on engine size a 3.1 liter v6 and a 2.2 **** 4cyl. are both located in the front of the engine.
Remove serpentine belt,remove 4 10mm from pulley (v6)(three 13mm for 4cyl.)remove pulley.v6 will have 6 8mm bolts,4cyl. will have 4 13mm bolts-remove clean surfaces install new pump.
About 40 mins.v6,60mins for 4cyl. Be sure to drain coolant before you start, refill whith proper coolant, some 95 up gm require dexcool anti freeze (orange in color).

Apr 16, 2010 | 1995 Oldsmobile Cutlass Supreme

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Engine coolant


you may want to try finding a tube of graphite usually sold at wal-mart in the automotive section that will clearly state it is for coolant systems; the graphite will build up around the hole and usually fix the leak; if not, consult your local mechanic to find the root of the problem... most likely a leaking coolant line, hose or radiator

Oct 06, 2009 | 2000 Saturn SL

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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.

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1 Answer

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The water pump is located along the left side of the engine underneath the plastic covers. You coolant leak is most likely a radiator hose.

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