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  1. ShEp1.8t

    S3 heater woes

    Yep, 100% casting sand in it. Went for an aftermarket unit this time as Audi ones seem to have problems.
  2. ShEp1.8t

    S3 heater woes

    For anyone following, turns out it was the matrix again. Was only changed last year with a genuine part too, so I've bought one from the motorfactors, changed all the seals and o-rings, new clamps on each pipe too. Whole system flushed clear again, as it was last time, for anyone doing one of...
  3. ShEp1.8t

    S3 heater woes

    Half of it's out to check the motors anyway, I've got a vacuum bleeder for it, it does the hard work. Just want it to be right for selling it on for the next person. I know I'd be pi$$ed buying a car for a decent amount of wedge and it wasn't working.
  4. ShEp1.8t

    S3 heater woes

    Genuine part used but that's over a year ago now. So unsure if it was the latest revision. I can do the matrix myself, fitting one isn't an issue, it only got done at the garage last time as it was under warranty
  5. ShEp1.8t

    S3 heater woes

    I kind of hoped so, but im now at the stage I'm swaying towards just changing the matrix again. It was previously flushed till it was clean and then replaced, I was hoping that was sufficient, but maybe there was some build up somewhere that slowly got through and blocked it again.