Astra Owners Network banner

coolant drain/flush/renew

  1. Where does this gasket belong?

    Astra H
    Hey guys, Seems there’s oil mixing in with the coolant on my Astra H (1.8 Z18XER). It appears it’s transmission fluid. The automatic trans oil coolers seem to be known to fail in the rad. Anyways, flushed coolant to remove the oil and the oil came came back ( not as much, car wasn’t driven just...
  2. Coolant Drain/Flush/Renew

    Astra H
    I had a split pipe and water was leaking out. This only happened once the engine was hot and the thermostat was open. Got new pipe and no more leaks but I want to drain/flush/renew the coolant as its now more water than coolant. How can I go about accomplishing this? I have a Haynes manual and...
Top