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93 Ford 150 Serpentine Condenser

jgcox6 on Sat November 24, 2007 12:05 PM User is offline

Year: 1993
Make: FORD
Model: F-150
Engine Size: 4.9L
Refrigerant Type: R-134 CONVERT
Country of Origin: United States

How much freon should I put in if I had to change from a tube & fin to a serpentine condenser? DO you have to reduce the amount? My system was a R-12 that took 44oz of freon. What should I add now? How different will the gauge readings be with the different condenser/

TRB on Sat November 24, 2007 3:14 PM User is offlineView users profile

No need for a capacity change do to a condenser swap. But since you are changing refrigerants you should start with 80 percent of the R12 charge and work up slower form that point watching vent temps and low and hi pressure readings. Did you replaced the oil and accumulator also do to the refrigerant change?


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Chick on Sat November 24, 2007 3:18 PM User is offlineView users profile

Your original condenser was most likely a "piccalo" design, not a tube and fin, but I could be wrong. So since you are both retrofitting and using an aftermarket condenser of a different design I would first change the fan clutch now before you even charge the system. Unless it is already new.. You are going to need a good airflow, and fan clutches wear out after a couple years.. They may seem to be pulling a lot of air, but really are not. Next, you can follow the vac/charge procedure on the Tips and FAQ page of this forum. When you are close, say 80 to 85% of the R12 charge, feel both the inlet and outlet of the evaporator. charge until the inlet and outlet are the same temp...When they are both the same temp, outlet may be slightly cooler, you are done. Pressures give you an idea and guide, but it's the temps of the evap that will tell you it's done. Try to stay around 2.2 to 2.5 times the ambient temp on the high side, but that also is just a guide.. Use the temps of the inlet and outlet of the evap to tell you that the system is full...Hope this helps..

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jgcox6 on Sun November 25, 2007 9:32 AM User is offline

I had to do a complete new system...i changed out everything! If you guys remember...I am the one that had "another" compressor experience "black death" because the Mechanic that did my last one..didn't flush the condenser good enough apparently.. not to mention they had actually damaged the other condenser and had to bypass some of the tubing! Anyway...figured I would do it right...replace everything!

jgcox6 on Sun November 25, 2007 9:34 AM User is offline

Thanks for the advice. oh and it is a new fan clutch as well...and will do what ya tell me because you guys are the experts...I am just a guy trying to make a living, raise 4 kids, 3 guinnea pigs and a dog...while trying to keep my ol truck going to be able to keep my sanity! YOU GUYS ARE AWESOME...

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