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Knocking/ticking noise from the A/C
After the car sits for a while (hour or two or more) I hear a knocking or ticking noise when the air conditioner is on. When I turn the A/C off, the sound goes away. After I drive for a while, the sound goes away. When the car was turned off I thought I heard a hissing sound from near the compressor. How many o-rings does this system have? I replaced one lat year. Maybe another is leaking and I am getting air pockets in the line? Suggestions on how to troubleshoot?
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Tony 1996 Polo Green Subaru SVX LSi, 168,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 5W50 FS (3qt) and 5W30 High Mileage (4qt) Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, Centric Rotors, Power Stop Evolution Carbon Fiber Ceramic Brake Pads 2005 Gray Acura RL, 165,XXX miles, Redline D4 ATF with Lubegard Platinum Protectant, Mobil 1 5W20 High Mileage Extended Performance Oil 2009 Red Toyota Venza, 123,XXX, Mobil 1 5W30 High Mileage Oil 1992 Red Ferrari 348 ts, 82,XXX, Redline everything |
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