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Required amount of R134 for stock 1988 911

Heating and Ventilation

Vehicle Information: Model: 911 ; Year: 1988; Body Type: Coupe; Engine (type, size, modifications): 3.2L; Total Mileage: 95K;

I am a six-year second owner of a pristine, stock 1988-911 Coupe. Unfortunaltey, the only problem has been intermittent AC issues...including with the orginal owner. I inspected and found several worn/leaking AC hoses and a leaking AC compressor and evaporator. I've replaced every component in the AC system...and will be using R-134. My sticker in the engine compartment states how much R12 to use. How much R-134 should be used when charging this stock system with front and rear condensors?Thanks/Darius

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