Compressor oil

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Aug 19, 2019 | 10:03 PM

One Sock

Thread Starter

Tuned

Joined: Aug 2010

Posts: 343

Likes: 7

From: Arizona

Compressor oil

I'm replacing the air con compressor on my 2000 7.3. I have a new Four Seasons compressor, and the generic instructions that came with it are very confusing about adding oil. It says, "This compressor is charged with 3 ounces of Oil. Must add recommended amount and type... for compressors without an oil plug, install half the required system oil in the suction side... the remaining amount of required system oil should be installed in the accumulator."

But nowhere does it say how much is the "recommended amount" of oil. Is the 3 ounces not enough and I need to add more? I'm only replacing the compressor and accumulator, not the entire system.

Aug 21, 2019 | 07:24 AM

416bigbore

Junior User

Joined: Aug 2019

Posts: 93

Likes: 1

Hello, No AC expert here, but I will address my own AC issues myself to help save from a costly shop visit. I posted two links below that should help you, Youtube is another good place to look for helpful DIY repair info. I also like to add the compressor oil with dye in it to help find any slow leaks that may develop over time. I would rather find the leak issue with the dye over adding Freon with stop leak in it. On the Four Seasons link below I found a PDF download that gives the total amount of AC system oil for your truck, 14 oz with rear AC and 9 oz without. They should also have a Tech Support contact number to call for any other questions you may have? Hope this helps, Good luck !

https://drivinglife.net/how-much-oil-in-ac-compressor/

https://www.4s.com/en/products/compr...ut-compressors

Aug 21, 2019 | 08:27 AM

ford390gashog

Fleet Owner

Joined: Jan 2004

Posts: 26,007

Likes: 575

From: Brentwood,CA

Quote:

Originally Posted by One Sock

You should during a compressor replacement flush the system. So then you start with a dry system, the oil charge is with the refrigerant charge on the underhood label.

Jul 11, 2024 | 08:24 PM

wpg_250

Fleet Mechanic

Joined: Feb 2023

Posts: 1,924

Likes: 817

Any of you fellas down south use this brand of a/c refrigerant and if so is it good stuff?

Thanks

https://www.walmart.com/ip/SuperTech...2&from=/search

Jul 12, 2024 | 08:25 AM

shaun.be

Tuned

Joined: Dec 2015

Posts: 349

Likes: 72

From: Seguin, Texas

I use the Walmart freon in my truck. no issues with it, I can get it down to almost 40 degrees out of the vent when its 102 degrees outside.

Also, don't put too much oil in the system or the a/c won't work as its intended,

Jul 12, 2024 | 09:51 AM

wpg_250

Fleet Mechanic

Joined: Feb 2023

Posts: 1,924

Likes: 817

Quote:

Originally Posted by shaun.be

I added roughly 4oz of pag 46 oil after replacing parts which fixed the leak and used 25oz of over the counter Canadian garbage AC pro brand to charge the system and got vent temp down to 50f which i wasn't happy with so i hooked up my gauge set and low side hovered around 35psi and high side around 150 and should be closer to 50/250 with ambient temp so i fiddled a bit more and made things worse lol so I'm just going to order some of the good stuff you guys have down south and start from scratch and see if I can get vent temps down to 40f.

Already spent more than what a shop would charge me lol, but I'm stubborn and want to learn how to do everything myself.

Thinking it might be a good idea to remove a bunch of the ac components and drain/blow out as much of the pag oil as possible so I can redo the whole system from scratch and might as well replace the in dash evaporator while I'm at it and install a ball valve to block off the heater core just for the summer.

Jul 12, 2024 | 01:32 PM

nydiver

More Turbo

Joined: Jun 2009

Posts: 661

Likes: 186

From: Lakeland, MN

You want a vacuum pump to pull the system down to -30in. leave it for an hour, if it stays better than -25 its sealed. Also pulling it down will pull moisture and alot of the oil out of the system. Fixing a leak and slamming refrigerant into the system is not going to yield the best results. You also want to replace the dryer (accumulator) if the system was depressurized and ambient air entered