Coolant question

[Bob Kontak]

Originally Posted by VincentVega

Fill it up and pressurize, you'll see where its leaking if its external.

Nail the problem source, as mentioned.

Change the thermostat. It can stick closed and overheat, venting coolant. Even if ok, I would change for general PM reasons.

Also find if there is an air bleed port.

Clogged radiator
Packed fins
Thermostat
Water pump
Leak

Not much left unless some cam/crank sensor/timing issue and that would spit a code.