🙂 Hi Scotty love your channel and videos. My question 2011 ram 1500 4.7. I want to recharge my AC system. I will vac the system to make sure moisture and air out. I have been looking to see how to add pag oil which I need 6oz easily. Adding to the yellow line on manifold gauges would take forever. I ordered a oil injector tool. Can I inject the oil into the high side of the system. I would fill the tool which is only 2oz at a time. With high side closed connect tool and once connected open valve an inject the oil. 1. Would this work 2. Would I be introducing any air into the system I saw videos on YouTube where air was def being introduced the way some people were doing it without the oil injector tool.
if easier way please tell
i also did see your video on how to charge the AC but you didn’t have to put any oil in
thanks much and keep up the great videos
Chuck in New York (Not the City)
You don't need to add oil unless you've lost some due to replacing parts or a sudden failure like a hose rupture where refrigerant and oil spray out uncontrollably. Hardly any oil is lost when pulling vacuum.
Oh so even after I vac the system oil is still in the compressor? So if I did add 6oz of pag 46 that means I would have added too much?
Yes. That's why you didn't see Scotty add any oil in the video you mentioned.
Thanks much. Appreciate all of Scotty’s videos. Guy as work know his channel and love it as well
Quick question. When I add the refridgerent in the compressor should kick on. If it doesn’t how would I get the system to suck the refridgerent in? I saw people jumping the ac cluch relay to do it. Is that a safe way? Thanks
Yeah, so long as you didn't rupture a hose or something, the PAG oil pretty much stays in the system. I have a '99 Ranger, I thought it just needed a recharge, so I vacuumed the system out, and put new refrigerant in, and the compressor started clunking. I had a tiny leak that had been there for a long time. I put a new condenser and accumulator dryer in, put in new PAG oil as far as it would go, and it's been fine since. No clunking, etc. and it's been almost 3 years now. I didn't know how much PAG oil was still in there.
It's a guessing game with oil unless the system is flushed out and you're starting fresh. There are rules of thumb for how much oil to put in for parts that are replaced, and a specification for a replacement compressor.
Yeah, I'm not sure how many times that compressor leaked out, it was such a small leak. I put like 3 oz of oil in it, as much as it would hold, lol. I didn't know you could rent special tools until after the fact.
Oh yeah I saw you could rent the tools from the auto stores. I bought my set of manifold gauges because I figure it’s good to have. 2011 ram 1500. 129,000 miles. I have done the breaks, changed original battery, altamator, starter then went that was a doozy getting my chubby ass under the truck I am not that flexible anymore. I am hoping to keep this truck until the bolts fall off. New trucks today being $80’000 or such who can afford them. I’m great at building computers and doing some mechanic stuff. Not like my brothers who were a little older then me and could strip and engine or car apart totally and rebuild it. My brothers head gasket blew once on the highway. He always carried extra parts and his tools and he did the job on the side of the highway lol. The state trooper couldn’t believe it lol
No worries. I deleted them.
Quick question. When I add the refridgerent in the compressor should kick on. If it doesn’t how would I get the system to suck the refridgerent in? I saw people jumping the ac cluch relay to do it. Is that a safe way? Thanks
You can BRIEFLY hotwire the compressor clutch that way, but make sure it actually pulls refrigerant in and disconnect the jumper as soon as not needed. Oil in the refrigerant is what lubricates the compressor and without it the thing will quickly self-destruct if the clutch is engaged. Really since you pull vacuum first, some refrigerant should be sucked in immediately though it may not be enough to overcome the low pressure safety cutoff for the compressor. Usually at least 20 psi on the low side is needed for the compressor to run.
Thanks much. Hopefully it does pull the r134a in