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My 99 Plym Gr Voy started to overheat. I added water to the water reservoir and radiator. It seemed to be fine for a week or two, then the fan belt broke. I had that replaced. It started to overheat again and the car makes a noise that sounds like an animal is crawling inside the engine or something like a vacuum suction sound. I checked under the hood to make sure no animal was in there but noticed the water reservoir was empty. I filled it but in a few hrs the water was gone. I am finding a water spot on the ground underneath the resevoir. I have been adding water to the radiator daily now in fear that I will overheat. As long as I do this, I am not hearing that scratching air vacuum sound. The heat works fine as does the AC. I do smell the radiator at a sweet syrup smell. There is no leaks onside on the floor so I dont think its the heater core. My husb did a back pressure test that turned out fine. He hasnt seen water on the ground from the reservoir, but I have each and every time. Any suggestions here?

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  • geoffpat
    geoffpat Nov 03, 2012

    could be a small crack in the reservoir bottle wich only comes out under pressure



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  • 12 Answers

Check water pump and all rubber hoses make sure they are tight fitting with no damage .

Posted on Nov 03, 2012

  • jdumpshome Nov 03, 2012

    the water pump and hoses are fine. Do you have any other ideas? Thank you.



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SOURCE: Have a 2003 ford f150 crew cab truck will start to

Problem is most likely the water pump.Have seen several of these doing this on the 5.4L. Impeller fins were damaged on the ones that I have seen.

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SOURCE: 1999 Gr Jeep Cherokee-antifreeze issue

how often does the warning comes on doing the week or in two weeks? if it was a one time thing or this takes place every 3-5 months i wouldn't worry about it. i will make sure that the radiator cap is on tight. you said that all hose seem to be in good condition i would check the radiator where the cooling fan covers the fins and the water pump because it has a warn hole at the base that will seep out antifreeze when the inside seals are going bad these will cause the smell also.

Posted on Mar 21, 2009

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SOURCE: Overheating '99 Mazda 626 LX 6-cyl

This happened twice to me.Just replace coolant overflow container,buy new one not used .Always keep an eye on container , will happen again.

Posted on Apr 24, 2009

  • 1 Answer

SOURCE: 99 cavalier overheats

I was just having the exact same problem with mine!! (my 1999 Chevrolet Cavalier)
It turned out that replacing all of the parts you mentioned, I just had an air bubble in my system and needed to run it with the cap off and fill it up with water as the engine ran and the air escaped.
Hope that helps you!

Posted on Jun 02, 2009

  • 85 Answers

SOURCE: 2000 Dodge RAM no HEAT/ New heater core / AC evap.

There is a actuator on the right side of your leg while sitting in the drivers seat under the dash. It has a plastic rod for actuation manually actuate this diverter and should be the problem.

Posted on Oct 14, 2009

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