R-12 to 134a Conversion question

[Brandon K.]

Hi. I saw the post from a few days ago regarding R-12 and I am wondering how conspicuous are the port adapters? From what I've seen on the conversion kits, the adapters look kindof big and ugly. That's the biggest thing holding me back from making the change. I have my system totally apart so now would be the time to do it. Thanks, Brandon

[Allan Wicklund]

Re: R-12 to 134a Conversion question

Brandon, I am presently working on my 67 with A/C. If you shoot me an email we'll keep in touch as well as posting here.

[Allan Wicklund]

Re: R-12 to 134a Conversion question

Brandon, I am presently working on my 67 with A/C. If you shoot me an email we'll keep in touch as well as posting here.

[Christopher R.]

Re: R-12 to 134a Conversion question

As you note, the R-134a ports are different from the original R-12 ones. This is to positively prevent using the wrong refrigerant. You are also supposed to put a conspicuous sticker in the engine compartment advising of the change.

I suppose you could trick this system. That is, keep the R-12 ports and finagle some way to get an R-134a hose to mate with them. Probably need to use a combination of brass fittings.

Where are the high and low ports on your car? Are they obvious? You fill through the low pressure port. That's the only one you would need to change. Yes, the ports are noticeably different, but the point deduction can't be too much.

[Christopher R.]

Re: R-12 to 134a Conversion question

As you note, the R-134a ports are different from the original R-12 ones. This is to positively prevent using the wrong refrigerant. You are also supposed to put a conspicuous sticker in the engine compartment advising of the change.

I suppose you could trick this system. That is, keep the R-12 ports and finagle some way to get an R-134a hose to mate with them. Probably need to use a combination of brass fittings.

Where are the high and low ports on your car? Are they obvious? You fill through the low pressure port. That's the only one you would need to change. Yes, the ports are noticeably different, but the point deduction can't be too much.

[Dave Christensen]

Re: R-12 to 134a Conversion question

The R134A will cause most of the rubber materials used in the seals in the R12 systems to swell and leak. This will cause you problems with trying to adapt the exising port fittings.

Dave Christensen

[Dave Christensen]

Re: R-12 to 134a Conversion question

The R134A will cause most of the rubber materials used in the seals in the R12 systems to swell and leak. This will cause you problems with trying to adapt the exising port fittings.

Dave Christensen

[Clem Z.]

Re: R-12 to 134a Conversion question

check into R-414B,you do not have to change anything,so i have been told by the A/C guys.

[Clem Z.]

Re: R-12 to 134a Conversion question

check into R-414B,you do not have to change anything,so i have been told by the A/C guys.

[Brandon K.]

Re: R-12 to 134a Conversion question

Dave, I just replaced everything. New evap, new POA, new exp valve, new O-rings, everything. I guess I still need to put a port adapter in, though.

[Brandon K.]

Re: R-12 to 134a Conversion question

Dave, I just replaced everything. New evap, new POA, new exp valve, new O-rings, everything. I guess I still need to put a port adapter in, though.

[Larry Barickman]

Re: R-12 to 134a Conversion question

You can splice together an R12 hose and an R134 hose and use the stock service ports..But you will have to service it yourself. I would be illeagle for a shop to do this.

[Larry Barickman]

Re: R-12 to 134a Conversion question

You can splice together an R12 hose and an R134 hose and use the stock service ports..But you will have to service it yourself. I would be illeagle for a shop to do this.

[Dave Suesz]

How about R-414b?

I've been reading up on it, since it is recently approved, and the claim is it is R-12 system compatible (no need for seal and oil replacement), and 9% MORE efficient than R-12, not less, like R-134b. Still asking around, the only disadvantage I have seen is it costs about twice as much as R-134b, but at least no conversion is necessary.

[Dave Suesz]

How about R-414b?

I've been reading up on it, since it is recently approved, and the claim is it is R-12 system compatible (no need for seal and oil replacement), and 9% MORE efficient than R-12, not less, like R-134b. Still asking around, the only disadvantage I have seen is it costs about twice as much as R-134b, but at least no conversion is necessary.