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Tim's Auto Repair
Tim's Auto Repair, Mechanic
Category: Car
Satisfied Customers: 15373
Experience:  Have owned a repair shop for 25 yrs.
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R12: Refrigerant..pressures required..low and high gauge readings.I

Resolved Question:

I am changing over from R12 to C134 Refrigerant in my A/C, and I need to know the pressures required for the low and high gauge readings.

I also need to know how many pounds or ounces of refrigerent are reguired.

1991 Lincoln Continental
Submitted: 6 years ago.
Category: Car
Expert:  Tim's Auto Repair replied 6 years ago.


have you already changed the oil in the pump,,added a new dryer and office for the 134?

Customer: replied 6 years ago.
Yes 7 oz and also performed the vaccumm leak test
Expert:  Tim's Auto Repair replied 6 years ago.


how hot is it where you are...the ambient tempeture?

Customer: replied 6 years ago.
95 F
Expert:  Tim's Auto Repair replied 6 years ago.


after you have dried the system with your vacuum

lets not worry about the high side.....sense the 134=more than the r12..i cant really give an ounce amount...lets add the 134 until the low side holds between 32 and 50 psi..don't go over 50psi at this high of ambient should be fine



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