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freon lbs. for a 72 truck
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rgrimmer
New User
| Posts: 1
| Joined: 09/09
Posted: 09/28/09
05:46 AM
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I have a 72 chevy and I just converted to 134 freon. Does any one know how many lbs. of freon it takes. Right now I have 3 1/2 lbs. Is this correct? It is sweating good but it seems like it should be colder.
Thanks in advance
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autotec
New User
| Posts: 23
| Joined: 09/09
Posted: 10/02/09
09:47 PM
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not familair with what system the 72 runs but if is like the newer cheys it is a orfice tube design and you may have to change the orfice to a green tube ,that will make it ice cold and if it holds 3.5 lbs of r-12 you only want to put in 3.lbs of r-134a with about 6 oz. of ester oil, and 80% of the mineral oil should be removed from the old system or it will pool and not cool good.If it uses a exp. valve system install one made for r-134a. good luck it will never be as good as r-12 at idle but should work great on the road.
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