C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

a/c compressor`

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Old May 11, 2009 | 06:43 PM
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on a 87 corvette will the compressor still kick on if it doesn't have any freon in the system??

I am fixing to buy a new compressor, but noticed while taking it off that I can still turn the clutch by hand, but its hard, but still can be turned. So I hooked it back up and turned the a/c on and it won't kick on, but I have already taken out all the freon.
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Old May 11, 2009 | 07:06 PM
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When the pressure gets low, the compressor will not come on, if the freon is gone there is no pressure.
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Old May 11, 2009 | 07:11 PM
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Originally Posted by fearless
on a 87 corvette will the compressor still kick on if it doesn't have any freon in the system??

I am fixing to buy a new compressor, but noticed while taking it off that I can still turn the clutch by hand, but its hard, but still can be turned. So I hooked it back up and turned the a/c on and it won't kick on, but I have already taken out all the freon.

"on a 87 corvette will the compressor still kick on if it doesn't have any freon in the system?? "...= NO
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Old May 11, 2009 | 07:23 PM
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You can bypass the low pressure switch I believe to make it come on when the freon is low just to make sure the clutch is engaging. Your car takes R-12 which is pricey so I would have the tech who charges the system for you add in some dye and check for leaks right away. Good luck!
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Old May 11, 2009 | 07:23 PM
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You can jump out low pressure switch to confirm operation of the compressor. You should also jump out the high pressure switch.

It may be easier to just directly apply power to the compressor.

Dale
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Old May 11, 2009 | 08:32 PM
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I did just apply direct power to the compressor and it works. So my question is now, Can I convert my system to R134 and what is all involved in the conversion?
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Old May 11, 2009 | 08:37 PM
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WARNING ++++

Overriding the safety feature of the low pressure switch (especially with NO freon (or oil) in the system/compressor) for any length of time will likely destroy the compressor (if it's not already dead) -- so suggest doing this only for seconds if necessary...
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Old May 11, 2009 | 08:48 PM
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Originally Posted by fearless
I did just apply direct power to the compressor and it works. So my question is now, Can I convert my system to R134 and what is all involved in the conversion?
I bought the conversion kit and followed instructions. That was several years ago and its still all good. About 30 minutes and $30.
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Old May 12, 2009 | 01:11 AM
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Make sure you pull a vac. you need to remove all the air out of the system. Refrigerant an air don't mix you'll have a high low side if you don't..
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