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Losing coolant and foaming at radiator filler neck!?

I posted about my coolant not getting back to radiator after engine cools down a few weeks back. I tried putting a new cap and observed for 2 weeks. Now I still loss coolant. There were things I failed to mention or maybe didn't notice then when I first


Three things to check or address for sure... in this order...

1.) Coolant maintaining pressure after cooling down overnight... most likely indicates an incorrect cap... A.) the pressure lift-off valve should be of the correct calibration...

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