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  1. [Corsa C] [00-06] poor heater - matrix

    Astra, Corsa, Zafira, Meriva, Adam, Agila, Combo
    How easy to change heater matrix ?? Hi all, heater poor temp, disconnect both matrix pipes by egr & rear of stat, hose pipe on gentle an water struggles to pass through matrix. Added HOLTS SPEEDFLUSH to run through tomorrow then drop coollant an refill an see what happens.

  2. [Vectra C] [02-08] Coolant Change

    Cavalier, Calibra, Vectra, Signum, Sintra & Insign
    Coolant is all brown and looking horrendous. Can someone tell me where to drain the System from and what I need to do to flush it out. I believe I need 5ltrs to refill?

  3. [Vectra C] [02-08] Coolant Replacement

    Cavalier, Calibra, Vectra, Signum, Sintra & Insign
    Hi, Need to drain and replace my Coolant. Can anyone recommend best stuff to replace it with which won't cost me to remortgage my house? (Cheap as poss) Also was going to flush the system, can you tell me where to start and where to drain the system from? (Never done this as you can...
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