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vectra sri heating issue

  1. [Vectra C] [02-08] 2007 Vectra 1.8 Sri over heating

    Cavalier, Calibra, Vectra, Signum, Sintra & Insign
    My vectra sri is over heating. Right after start the car with in 1 min temperature move up to 90+ i can see from the expansion tank water is boiling. I have changed radiator as it had small lick, changed thermostat, water pump,i even change head gasket. Went to 3 different garage, but still same...