93*Corvette
Well-known member
I normally hang out on the C4 column, but since you guys perfer to keep the Mid years stock, I thought I'd ask my question here.
My father have 30lbs of R12. My 93 needs R12. Half the people I talk to say that you need to invert the R12 when filling, the other half say you keep it upright. Is this the difference from R12 and R134? Does R12 need to be inverted, and R134 needs to be upright?
On the cheap R134 guage, they have a presure meter on the filler hose that shows if your low, normal, high, over charged. Pretty simple. But with the R12, all I can find is the the professional manifold guage. An the instuction with it are very basic. Yes, I know that you can buy the cheaper type (without a pressure guage) connection on Ebay, but then I'd have get 12oz cans somewhere. So I'd rather use the 30lbs I have access too (and is free).
I know with the 12oz cans you can tell how much you put in because the can will be empty. How do you tell with a 30lbs cylinder? (with a scale?)
I'm afraid I'll over charge it.
Lastly, is there a web site that shows how to use a professional manifold guage? What do the guage reading mean to me? I know your never suppose to have the high side valve on/ connected when filling, but I want to know is when connected, what is the guages suppose to read on the high/low side? I live in Denver (5000 ft) and lets say its 70 degrees outside.
Can one of you cool Midyear people help me? Keep it extremely basic.
My father have 30lbs of R12. My 93 needs R12. Half the people I talk to say that you need to invert the R12 when filling, the other half say you keep it upright. Is this the difference from R12 and R134? Does R12 need to be inverted, and R134 needs to be upright?
On the cheap R134 guage, they have a presure meter on the filler hose that shows if your low, normal, high, over charged. Pretty simple. But with the R12, all I can find is the the professional manifold guage. An the instuction with it are very basic. Yes, I know that you can buy the cheaper type (without a pressure guage) connection on Ebay, but then I'd have get 12oz cans somewhere. So I'd rather use the 30lbs I have access too (and is free).
I know with the 12oz cans you can tell how much you put in because the can will be empty. How do you tell with a 30lbs cylinder? (with a scale?)
I'm afraid I'll over charge it.
Lastly, is there a web site that shows how to use a professional manifold guage? What do the guage reading mean to me? I know your never suppose to have the high side valve on/ connected when filling, but I want to know is when connected, what is the guages suppose to read on the high/low side? I live in Denver (5000 ft) and lets say its 70 degrees outside.
Can one of you cool Midyear people help me? Keep it extremely basic.
