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post #11 of 18 (permalink) Old 06-25-2019, 02:14 PM
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Some of the drop in mixes have worked reasonably well. Just stay away from R134a!

There are those that will tell you R134 is good and cools just as good as R12. I have to guess they live in Antarctica or northern Alaska.

Rick

Last edited by rick; 06-25-2019 at 02:22 PM.
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post #12 of 18 (permalink) Old 06-25-2019, 02:25 PM
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Unhappy Air con change to R134

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Originally Posted by rick View Post
R134 is terrible in these cars. It works good until the outside temperature gets above 95 to 97, then you might as well open the windows.
I have to agree with Rick. It's pretty useless at high temps. Trouble here is that we have nanny state laws regarding air con. We aren't allowed to top up- you have to find the leak first. R12 is banned.
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post #13 of 18 (permalink) Old 06-26-2019, 06:41 AM
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Does anybody know which Pro6TEN compressor is required? There is a SH (Super Heat style) and a HP (high pressure style). Both same price

https://www.oldairproducts.com/produ...pro6ten&mainc=
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post #14 of 18 (permalink) Old 06-26-2019, 07:03 AM
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Does anybody know which Pro6TEN compressor is required? There is a SH (Super Heat style) and a HP (high pressure style). Both same price

https://www.oldairproducts.com/produ...pro6ten&mainc=
Call them, probably super heat
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post #15 of 18 (permalink) Old 06-26-2019, 09:05 AM
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This is the one you want- 21-2201HP

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post #16 of 18 (permalink) Old 06-26-2019, 11:07 AM
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I'm the weird one, I have r134a in my car and I'm very happy with the system. So long as the vents are operating as intended, it keeps me cool even in the hot SoCal summers.

Trick is to not part the car in direct sun!
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post #17 of 18 (permalink) Old 06-26-2019, 11:34 AM
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I have the 21-2201HP on my W108 4.5 I changed all the barrier hoses and flushed the system. Went with R134a. It cooled OK until 2 years ago when I bit the bullet and changed out the condenser for a modern horizontal flow aluminum one. Now, I get cold in the car and never have to run at the coldest settings, even in 90 weather in traffic ( It takes me an hour to drive the 8 miles home in the afternoon). So, I'm with "okyoureabeast" on liking the R-134a. You just can't expect it to perform with the antiquated condenser.
cwmoser and okyoureabeast like this.
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post #18 of 18 (permalink) Old 06-26-2019, 01:27 PM
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You just can't expect it to perform with the antiquated condenser.
I think that might be the magic right there, the condenser on my car was replaced and looks to be more modern.
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