Losing coolant

Tiny
JERRY AUGUST
  • MEMBER
  • 2003 TOYOTA HIGHLANDER
  • 3.0L
  • V6
  • 4WD
  • AUTOMATIC
  • 180,000 MILES
No sign of coolant leak on ground. No water in oil, no oil in water. No white smoke from exhaust. Have to add half a gallon of anti freeze every week. Car runs great. Does not overheat. Where is this anti-freeze going? What else can I check?
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Monday, July 10th, 2017 AT 4:13 PM

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Tiny
HARRY P
  • EXPERT
You need to get a cooling system pressure tester and check it out. You can borrow it from AutoZone. Here is a how-to guide: https://www.2carpros.com/articles/radiator-pressure-test

You should not pump it to more than 17 psi though, as that could cause damage. Basically, you are going to pump it up and then listen for a hissing sound. Follow it to your leak. Be sure to check inside the car if you cannot hear it outside (as it could be a leaky heater core). Good luck and let us know what you find.
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Monday, July 10th, 2017 AT 8:13 PM

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