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AC stop leak additive

Hi guys my daily Audi A4 tdi keeps loosing AC gas after around 2-3 months .It had a new compressor /revived dryer/and condenser rad just over 2 years ago .Im going to get it regased tommorow just wondered if any one had used stop leak .it has been leak tested with dye but they can't find s leak thanks .

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    Have you checked the schrader valves on the high AND low pressure side (the 2 filling valves) these can not seat correctly and leak from there...I normaly check mine with a big mouthfull of spit right over the top:biggrin: if it bubbles up its leaking:yes:

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    Ok cheers mate will check tommorow after re-gas thanks.

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