I'm going to be putting in my new used engine soon and my entire ac system was depressurized and bled out.
I'm not too savvy on the AC system, all I (think I) know is I need to put some PAG46 into the compressor, fill with R134a, and some sort of A/C recharge kit.
Does anyone know the proper procedure and measurements to recharge it? Any tips are greatly appreciated 👍
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This is something you take to a mechanic. You need to draw the system down to a vacuum and then monitor it for at least 10 minutes to assure there are no leaks. There are machines made for this and its not something that a driveway mechanic is qualified for. There are regulations for the handling of refrigerant because of the environment. Also make sure you use new, purpose built o-rings for the pipe seals and you should replace the high and low side schrader valves.

 

Damn ur right I'm not qualified just being a low experience driveway mechanic 😞. Let me take the new engine out, put the old one back in, sell the cherry picker, tow it to a mechanic and just pay em like 3k to swap it for me.
Jokes aside, I appreciate your response but I believe this is something very doable for a driveway mechanic as long as you do the proper research and are careful like with any other job. I will definitely replace the seals, but are the schrader valves really necessary?
I plan on flushing the system, I already have a vacuum pump so I just gotta buy an ac manifold gauge set, emptying the compressor oil, replacing condenser with dryer and filling with PAG46 and r134a with a bit of UV dye.
Any other tips are greatly appreciated 👍

 

OK so you didn't reveal you had the tools and knowledge (things like adding the same amount of oil in a new compressor as the old) in your post so I apologize. Beyond an actual mechanical failure one of the most likely leaks comes from the schrader valves so most mechanics just replace them as a maintenance item. They are just another rubber ring on a spring and they are cheap. I'm guessing you also have a UV flashlight and glasses?

The amount of refrigerant should be on a sticker in the engine compartment. As far as measuring you can use a kitchen/snail-mail scale to measure the weight of the refrigerant can during the recharge procedure. Just make sure the hose that connects to the can is not moving around adding/removing weight which will affect the scale's accuracy. I am assuming you're using small cans of course.

Good luck with it. I've just seen too many people watch a couple of youtube videos, buy something from Amazon and a week or so after they have "fixed" it suddenly the AC no longer cools (leaks galore) and all of that refrigerant has been blasted into the stratosphere.

V/R

 

no need to apologize, I was just joking haha. Thanks for taking to time to share your knowledge, I'll take all your tips into consideration and I'll look into replacing the schrader valve 👍 Hopefully I'm competent enough to recharge it properly haha