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Losing coolant, no visible leaks


GonzoUSN

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Good Afternoon:

 

Trying to help out a neighbor whose husband is on deployment.  Their 2011 Journey is losing coolant but there's no visible leaking.  Pressure test coming back good.  Radiator fins not blocked and cooling fan comes on.  She's been adding coolant to the vehicle every five or six days.  She's using the universal coolant from one of the box auto parts stores.  What else should we be looking at?

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Don't use universal coolant for one.  Mixing coolant types will cause blockages in the radiator or engine at best, heavy corrosion at worst.  Get the coolant flushed correctly as soon as possible.

 

Check the consistency of the engine oil.  Yellowish to black is fine, chocolate milk like is a failed head gasket.  You also want to check hoses, especially any that are above hot components (like the exhaust manifold). If it's leaking from there, it will drip onto the heat shield and evaporate before you can see the leak.

 

One last place to check off hand would be the coolant overflow bottle - make sure it isn't cracked.

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