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Discussion Starter · #1 ·
I have a 90 chevy 350 and i need to change my air conditioning from R-12 to R-134. How would i go about doing this?
 

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got beer?
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just evacuate r-12 install 134a adapters on charge ports,pull vacuum,charge with 134a and you are good to go.have done lots of vehicles like this and never had any problems
 

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HOT AIR BALLOON OWNER
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Don't forget if you happen to open the system.. you must replace the dryer! I'd consider doing the o-rings also due to the age of your truck while you have it down.

Flush that out and get a new fixed oriface tube too!

Just as Benhiers said... you need some inexpensive fittings for the ports and that's about it.

:shake:
 

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Discussion Starter · #5 ·
The kit comes with a bottle of oil and 3 bottles of r-134 and all the fittings. There are also 3 ports which ones do i use for the oil and r-134?
 
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