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Re: Head Pressure building up
We are running r134 right now, but I think we are going to change over to freeze12. I really don't know a whole lot about a/c, so we had a local shop do the leak testing and charging. We did do the retro fit, I think that is the expansion valve that has the pressure switch on it. I do know that when you turn on that compressor you can really feel a "bump" in the engine right when you turn it on. I figured this can't be to hard since it came from the factory with this condensor set up, although it had a mechanical fan and not 3 electric fans.
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1972 Chevy SWB - ZZ4 crate motor, 700r4, makes lots of noise! - SOLD
1987 Chevy SWB - SOLD
2000 Chevy SWB - 6.0L heads, Lunati cam, Whipple supercharger, 3.73 posi, caltrac traction bars, headers, custom tune and Borla race muffler. 500 H.P.
1970 Oldsmobile Cutlass 442 w-30 - original
 
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