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heater core
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  1. MK3 TSB, Recall & Problems Archive
    I search a bit and it seems that maybe I have an O-ring issue. The heater core has never been out and I'm wondering how that o-ring would just fail. It does have 245K miles. I expect that if the heater core was leaking, I'd have coolant on the inside of the vehicle. Thoughts? Is this a...
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