A/C System rebuild - what should I replace?

[DieselSJ]

Originally Posted by SCOTI

Curious? Why not just use the recommended unit for GM trucks?

Because orifice size in the blue tube works best in systems converted from R12 to R134.

Go search the forums over at www.ackits.com and there are discussions about it.

[SCOTI]

Originally Posted by DieselSJ

Because orifice size in the blue tube works best in systems converted from R12 to R134.

Go search the forums over at www.ackits.com and there are discussions about it.

Hhmm.... I'll do some reading.

[ApacheIvan]

Originally Posted by SCOTI

Hhmm.... I'll do some reading.

To that point. I put all original system back except I put R134 in, I was told by the tech that the condenser I had in it (stock) was not conducive to 134, the tubes are bigger and spaced out too far, the recommended condenser for 134 is smaller tubes and closer together. My AC with all new old stock is marginal at best. I am going to evacuate the r134 and go to R12 soon.

[DieselSJ]

Originally Posted by ApacheIvan

To that point. I put all original system back except I put R134 in, I was told by the tech that the condenser I had in it (stock) was not conducive to 134, the tubes are bigger and spaced out too far, the recommended condenser for 134 is smaller tubes and closer together. My AC with all new old stock is marginal at best. I am going to evacuate the r134 and go to R12 soon.

What you want is a parallel flow style instead of a serpentine style. A couple companies make direct replacement parallel flow style condensers for our trucks.

[Mattchu60]

Any suggestions on where to find the parallel flow style condensers for our trucks? I did a google search but came up short.

[DieselSJ]

Originally Posted by Mattchu60

Any suggestions on where to find the parallel flow style condensers for our trucks? I did a google search but came up short.

http://www.ackits.com/index.php?rout...rch=CN+3642PFC

[SCOTI]

Originally Posted by DieselSJ

What you want is a parallel flow style instead of a serpentine style. A couple companies make direct replacement parallel flow style condensers for our trucks.

I checked into this when building my dually. I called a reputable aftermarket manufacturer about one in the same dimensions as my OE unit. He told me that the serpentine condenser in these trucks had enough surface area that they would get the job done. He said I could spend the extra money for a parallel unit & might (might) see 1-2° difference in vent temps.

He said he would take my money if I insisted but that he felt the need for full disclosure.

[DieselSJ]

Originally Posted by SCOTI

I checked into this when building my dually. I called a reputable aftermarket manufacturer about one in the same dimensions as my OE unit. He told me that the serpentine condenser in these trucks had enough surface area that they would get the job done. He said I could spend the extra money for a parallel unit & might (might) see 1-2° difference in vent temps.

He said he would take my money if I insisted but that he felt the need for full disclosure.

What MFG would that be?

[SCOTI]

Originally Posted by DieselSJ

What MFG would that be?

I knew after I typed that the question would be asked. I would have to go back through my notes on the project for the manufacturer. I found them through various online threads for people wanting a custom/built to spec condenser.