Troublesome coolant loss

[getty150]

Originally Posted by andrewwynn

Which o-ring? I bought a ten pack of the model for the lower radiator sensor and needed almost half of them between the few cars I helped maintain

For me it was the larger O ring at the bottom on to the housing... In my case

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[andrewwynn]

Housing?

When you suspect a slow leak that evaporates before it drips, wrap some blue shop paper towel around the area. They turn dark when wet also even if they dry the texture will change to stiff.

[Effduration]

In post 1 of this thread, OP mentions having to refill coolant every 50-60 miles...that's a big leak and even if it were to evaporate quickly (not likely) there would be the tell-tale signs of dried coolant..

[andrewwynn]

When my reservoir split at the seams I had to add coolant that often with no drips. I finally noticed wetness on the reservoir about the 5th time I topped off.

Base model dashboard has no level indicator but it was cold enough outside to need heat and the heater will stop putting out when the coolant level gets low.

[getty150]

Originally Posted by andrewwynn

Housing?

-Mount-

[X5chemist]

Check the tank top small connection o-ring. My cracked inside the connection. It was a perfectly broken ring inside. The part that holds the oring broke off perfectly round. Take off the connection to check.