Coolant problem

4efteboost

Member +
Hi, my cooling system keeps pressurising and ive had a compression test done and sniffer test and both were fine. Im baffled atm and cant understand what else could cause this. Could it be a crack in the head?
 
It may jst be air in the system i had this an ended up being my head gasket try runnin the car with the rad cap off for a bit and watch for bubbles mate !
 
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