Year: 1989
Make: Honda
Model: Civic
Engine Size: 1.5
Refrigerant Type: R12
Just like the title says - can I mix dye to the R12 mineral oil before adding it to the system? I'm hoping to this way avoid having to try to "inject" the dye later on.
I'll be (hopefully) putting my new system together this weekend and it would be really convenient if I could just add/mix the dye when I put the oil in the system. I see they make oil for r134a systems that already come with dye mixed in but I can't find anything like that for R12/mineral oil.
Mixing it in a bottle or mixing in a system really makes little difference.
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You can just pour dye into one of the system lines while it is open. It will mix when the oil starts to flow.
Check out this picture some uv dye set ups have little lines on them that show you how much to use per injection. The picture of the dye canister in the injector has lines that show you to squeeze until the next line to test a car.
Once that stuff mixes in, you don't need much that a little squeeze of it.
Edited: Tue May 01, 2012 at 12:09 AM by RobbieP
Use 1/4 oz, maybe even less in a small system such as yours. Anything other than refrigerant in the lines is just getting in the way of heat transfer.
I had actually bought a dye injector kit a month or two ago, and now realize that was pointless to buy since I don't need to "inject" it after the fact since I put it in ahead of time. The kit said to use 1/4 oz of dye for every 10 oz of oil in the system. Since my system only takes 5 oz of oil I used 1/8 oz of dye. I've got the car sitting on vacuum now to verify it holds vacuum (been an hour now, and it's holding steady). I'll charge it this afternoon and then with the dye in the system I'll periodically check for leaks in the coming months
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