Thread: W123 leaking expansion valve
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Old 06-17-2018, 12:13 PM
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ROLLGUY ROLLGUY is offline
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Join Date: Oct 2007
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It is best to use soap and water solution (or kids "bubbles" from the dollar store) if you still have pressure in the system. Even with UV dye, leaks are sometimes hard to find, but the bubbles will always show a leak.
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