R134 conversion question

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Jul 12, 2025 | 04:30 PM

Cravan

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Joined: May 2023

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R134 conversion question

Hello everyone, i recently got a 1993 coupe and i am looking into a conversion for r134. my biggest question is what do i need? I know i need the new oil for r134, orings, and to flush the system. Do i need a new drier or condenser? I have searched but never got a very clear answer and im trying to do this for relatively cheap.

Jul 12, 2025 | 06:11 PM

typical boomer

Pro

Joined: Jul 2023

Posts: 542

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From: Marysville WA

I'm just going to jump in here and say that Arbee can be a fantastic resource re: C4 A/C systems. Keep him on your good side. Just my 2 cents.

Jul 13, 2025 | 08:18 PM

The Green Hornet

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Joined: Jun 2005

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From: Everyone needs something to believe in, I believe I'll have another beer. Wisconsin

I just did a search for R134 conversion in the c4 section and nothing came up, just saying.

Jul 13, 2025 | 10:32 PM

arbee

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Joined: Feb 2003

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From: Saskatoon Sask.

Quote:

Originally Posted by The Green Hornet

I just did a search for R134 conversion in the c4 section and nothing came up, just saying.

Go to the search and put in "R12 to R134A conversion". In about two seconds, it will return 106 threads that deal with this situation. If you can't find the necessary information in 106 threads, then I don't know what to tell you.

JUST SAYING!

EDIT: I double checked and I made a terrible error. It's no where near 106. It's 64 threads here in General and 106 in Tech. I should have said 170 threads dealing with R12 - R134A conversions. My error.

Last edited by arbee; Jul 13, 2025 at 10:45 PM.