No coolant visible on floor -but level does have to be replaced. No white plume of smoke- no gummy white stuff on oil dipstick or overflow reservoir cap. Replaced thermostat and a small connector at back of motor - which tech said was leaking. Pressure test held at 15/16 lbs. No engine miss or check engine light. On short trips can see coollant temp gauge reach operating temp 200/210 and above that will trigger fan and temp will go down to 190/195 with process starting again -until - and usually when adding power on highway -50/60 mph - temp will rise - and continue rising until warning beep and I immediately pull over - shut down and let cool. Coollant overflow is at that time down or empty - I refill and am able to drive until this happens again. I turn heater to high when this is happening - and it does produce heat - helping some but not enuf to stop overheating. Could this be something other than head gasket? I have a bottle of Barrs (HG 1) but afraid to cause clog
What makes this problem better or worse?
sustained highway speed - at idle does not overheat
How long has your 2012 Dodge Journey had this problem?
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Bars is as good as it gets HOWEVER it is pointless to use it amuse even if it works it will only be temporary..
Recommend combustion leak test.
Has the coolant been serviced / changes as required?? ... Possible restricted radiator.
Good luck!
I don’t know what “amuse” means ~ ~ predictive text I guess.