1992 BMW 316

Air Conditioning problem
1992 BMW 316 4 cyl Two Wheel Drive Manual 248000 miles

i just changed my ac compressor and the dryer, but the problem now is when I turn on my ac the pipe to the condersor vibrate so loud, I have check it with my ac technician and he suspect my condensor need to change. I dont know why it should I change my condensor because it's works fine before I change the compressor, what should it do the settle this problem? Is it I need to clean up all the system by perging or I need to vacuum up much longer before filling the gas, by the way I using r12 gas for my ac.
May 18, 2009.

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