Any A/C experts online?

[kyleBblazercrazy]

I have an ac equipped 79 malibu. I'm using a 2007 lq4 with ac compressor. I am wondering what I need to connect the two systems.
I know the old is r12 and the new is r134a. I have all new components except for the compressor. Also what is the plug on the back of the compressor?

 

[kyleBblazercrazy]

Is that plug high pressure, low pressure, ground?

 

[kyleBblazercrazy]

Any ac guys?

 

[tc1959]

The switch is for High Pressure disconnect. It tells the ECM to shut off the clutch if the pressure gets to high. Depending on where you mount the compressor, I would guess your going to have to get a set of hoses made. You can get a o-ring and seal kit from Rock auto for under $8 that had everything you will need. You will also have to flush out all the old mineral oil in the system and add the approved amount of PAG synthetic oil.

 

[kyleBblazercrazy]

Thanks. All of my components are new except the compressor. So there should be no residual oil from the r12. But what do you flush a system with? And who makes adapter hoses?

 

[tc1959]

You will have to figure out what fittings you will need and go to a shop that can make the hoses. When I did the serp belt drive on my El Camino I bought a hose for a 92 firebird and cut the other ends off my old hoses. AC flush is available at most auto parts stores by the gallon. I bought a $40 flush kit off Amazon.

 

[kyleBblazercrazy]

Cool. Thanks for the info.

 

[kyleBblazercrazy]

This is what hoses I have from the new compressor . One full hose and one piece of hose. I have an old style accumulator with line kit, condenser, and evaporator. I just have to connect it all together and probably need a metering device.

 

[tc1959]

The orifice tube is in the small inlet of the evaporator core.

 

[kyleBblazercrazy]

The orifice tube is in the small inlet of the evaporator core.

Thanks. I realized that when I was looking at the evap core.