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Hi there, I have the renault scenic RX4. I start my journey with the engine over heating, so calls the aa man who reckoned it was the head gasget on the way out ...... So I had the head skimmed, teasted and re fitted along with new water pump, thermostat and housing and a new water expension tank cap!But it is now OVER PRESSURISING ............ Or could it possibly be alot of air in the system?????Can anyone offer some assistance as I am unsure of my next move cheers y'all
 

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over pressurinsing means there is gasses pressurising the system.
is a failed head gasket

do you have a diesel or petrol model?
 
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