Engine overheating when I on A/C

1994 CHEVROLET CAPRICE
480,000 MILES • V8 • 2WD • AUTOMATIC
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MNAEEMCH
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Dear Sir,
I have Caprice 1994, 4.3L. I overall engine on August, 2010 and know when I put A/C it become overheating and boiling the water and come out. I have put Thermostat valve, New Delphi A/C compressor, Accumulator with new (gas) pipes new radiator fans working properly.

BR
[email protected]
May 24, 2011 at 8:31 AM
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MERLIN2021
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possibly the radiator is clogged a bit, either the fins outside, or the core inside. a radiator shop can tell pretty quickly and price a new one for you
what was overhauled on the engine? was the block boiled out?
May 24, 2011 at 10:31 AM
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MNAEEMCH
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I already replace new radiator…

BR
May 24, 2011 at 12:20 PM
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MERLIN2021
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waterpump replaced yet? tell me all new parts so wr don't dance longer than we have to!
May 24, 2011 at 3:25 PM
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MNAEEMCH
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Yes, before 1 year I already changed.
Thanks for your cooperation, which is highly appreciated.
BR
May 24, 2011 at 3:59 PM
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MERLIN2021
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Condidtion of engine block? Was it sent to a machine shop during the rebuild?
May 25, 2011 at 8:13 AM