tsi_tom Posted August 7, 2015 Report Share Posted August 7, 2015 I got my car inspected yesterday. While I was there I asked if they have R12 to recharge my system. He said nobody does. And then I asked what it takes to convert to R134a, he said the whole system the needs to be flushed, dryer replaced, and a tube replaced. Link to comment Share on other sites More sharing options...
ucw458 Posted August 7, 2015 Report Share Posted August 7, 2015 I got my car inspected yesterday. While I was there I asked if they have R12 to recharge my system. He said nobody does. And then I asked what it takes to convert to R134a, he said the whole system the needs to be flushed, dryer replaced, and a tube replaced. And that's exactly how they get lots of $$$ from people. Most people don't know squat when it comes to AC. So they accept any BS mechanics say. Link to comment Share on other sites More sharing options...
tsi_tom Posted August 7, 2015 Report Share Posted August 7, 2015 Would you dump out the existing oil in the compressor? Link to comment Share on other sites More sharing options...
ucw458 Posted August 7, 2015 Report Share Posted August 7, 2015 Never have. I just fix the leak and charge. Link to comment Share on other sites More sharing options...
tsi_tom Posted August 7, 2015 Report Share Posted August 7, 2015 What is this tube that they are talking about changing? Link to comment Share on other sites More sharing options...
Edde Posted August 7, 2015 Report Share Posted August 7, 2015 What is this tube that they are talking about changing? Maybe the rubber pressure hose. Switch to barrier hose or some such thing. Link to comment Share on other sites More sharing options...
BuGG Posted August 7, 2015 Report Share Posted August 7, 2015 Probably expansion tube. Our cars run an expansion valve. The mike c post explains that its under the dash but should not need to be changed out because its compatible with 134a. The dryer is real simple to replace and might have the old r-12 oil in it. Its a $15 part and sits next to the oil cooler. Link to comment Share on other sites More sharing options...
JohnnyWadd Posted August 7, 2015 Report Share Posted August 7, 2015 I highly recommend replacing the drier. We cut a few open in my a/c class and they are not pretty inside even after 45 minutes of vacuum. Its a small price to pay to maximize the performance and longevity. Link to comment Share on other sites More sharing options...
Mech Posted March 2 Report Share Posted March 2 Old thread bumpage. I am going to convert the R12 to 134a on my 88 I want to replace all the o rings in the system. Where should i buy them? Just buy a kit with assorted sizes and match them up? Rock auto has two o ring kits available, anyone ever use them? https://www.rockauto.com/en/moreinfo.php?pk=3919260&cc=1062470&pt=13290&jsn=879 https://www.rockauto.com/en/moreinfo.php?pk=1251595&cc=1062470&pt=13290&jsn=880 Link to comment Share on other sites More sharing options...
BKB94 Posted March 2 Report Share Posted March 2 I bought 2 kits off Amazon. Just look at the sizes and it seems there are 2 common metric sizes from the kits I looked at. Think it was under $30 for both kits. Weird part is the larger the o-ring even if it fits the worse my micron rating while pulling a vacuum. It seemed if the tubes slipped together with slight drag from the o-ring it sealed better. Link to comment Share on other sites More sharing options...
Mech Posted March 2 Report Share Posted March 2 1 hour ago, BKB94 said: I bought 2 kits off Amazon. Just look at the sizes and it seems there are 2 common metric sizes from the kits I looked at. Think it was under $30 for both kits. Weird part is the larger the o-ring even if it fits the worse my micron rating while pulling a vacuum. It seemed if the tubes slipped together with slight drag from the o-ring it sealed better. Can you give me the links to the kits you bought from amazon. Thanks Link to comment Share on other sites More sharing options...
Mech Posted March 2 Report Share Posted March 2 Do I need to remove the old oil in the system beofre adding new oil, and if so, how do i do that? Link to comment Share on other sites More sharing options...
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