If your '85 has the original Sanden/Sankyo ac compressor it will be noiser if the refrigerant amount is low. Or of course if it is wearing out. Also carefully check comp. v-belt & pulleys on crank & comp. Any uneven wear can cause vibration & noise. Many "cheapo" belts are uneven width all the way round & will cause a vibration at certain rpm. Belts from NAPA/Gates are more money but usually better quality & run quieter. |
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