Factory/Proper A/C Refrigerant to use ? - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 7 (permalink) Old 05-07-2019, 04:04 PM Thread Starter
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Factory/Proper A/C Refrigerant to use ?

https://www.google.com/search?q=type...hrome&ie=UTF-8

Anybody know what type refrigerant to use on a 2008 Commander 5.7 ?

Also, what compressor oil ?

How much does it hold if it is completely empty ?
134?
R-134a refrigerant oil.?

Front & rear evaporator...

Thanks ?

08, Commander, Overland, 5.7L HEMI, QD-II

Last edited by vjsimone; 05-07-2019 at 05:24 PM.
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post #2 of 7 (permalink) Old 05-07-2019, 04:55 PM
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If you have to ask what type of refrigerant your vehicle needs. I am concerned.
However I will tell you, that it takes R134a.
And since you have front and rear units it's a total of 963 kg.
The oil is going to be ND-8
And that will take 220 ml.
I'm assuming since you want to know how much the entire system holds in oil.
You must have flushed out your system.
If you did not flush out. You only have to put in what you take it out.
So for example if you replace your compressor. Just drain the compressor and measure how much you take out. I put that much back in. That's everything quickly in a nutshell.


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post #3 of 7 (permalink) Old 05-07-2019, 05:52 PM Thread Starter
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Quote:
Originally Posted by Spraygun View Post
If you have to ask what type of refrigerant your vehicle needs. I am concerned.
lol. I did know that much... I was looking for a brand and with or without oil, sealer, leak detector, synthetic etc?

So, more to the story;

I traded another one for this one 4-5 years ago with a dealership, after the first season the system stopped cooling, they were on the hook to repair, so they put in some leak detector, charged it up, was cooling great again. I took it back a few weeks later for them to check for the leak detector and they said they could not find the leak. Next season, same thing.

So, year after year they charge it up, no leak found. Now they don’t charge me for this.
So, I don’t’ think they ever took the dash apart or the cowling in the rear. I know this because I did things to know if they took out nuts and bolts…..
I think it’s just easier for them to give it a charge and send me away happier, no charge $. But I’m tired of scheduling it, and spending a half day in the waiting room each year, dealership is an hour away.

The leak must be real small, I think.
It takes a year for it to leak down to the point where the system stops cooling.

This coming winter, I plan to disassemble interior parts and look for the leak myself. I’ll look at the rear first, and the lines in the wheel well.

My plan was to hang my gauges, pull a vacuum and recharge.
But you bring an important issue, oil….
So, how do I tell how much oil is still in the system ?
Thanks.

08, Commander, Overland, 5.7L HEMI, QD-II

Last edited by vjsimone; 05-07-2019 at 07:37 PM.
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post #4 of 7 (permalink) Old 05-07-2019, 07:35 PM
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I charged my up once a year for about 4 years. And then recently it finally gave up. It ended up being the evaporator inside the dash. I put dye in it years ago. And it never had a leak that I could find. So I just waited for it to go bad. I knew eventually it would surface.
If you replace the evaporator. Just drain it into something that will allow you to measure the fluid. Otherwise it holds about 40 ml.

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post #5 of 7 (permalink) Old 05-08-2019, 05:02 AM
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My leak was small as well. The rear cross member had rubbed the line. Capped them off as I have never in 4 years had the 3rd row seat in use. No rear air but not missed.
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post #6 of 7 (permalink) Old 05-08-2019, 07:45 AM Thread Starter
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Join Date: Mar 2014
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963 gr ?
34 ounces R-134a?

08, Commander, Overland, 5.7L HEMI, QD-II
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post #7 of 7 (permalink) Old 05-09-2019, 09:43 PM Thread Starter
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Join Date: Mar 2014
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Model year: 2008
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4WD
If 4WD - system: QD-II
Current Mileage: 150000
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Quote:
Originally Posted by vjsimone View Post
963 gr ?
34 ounces R-134a?

There was a small amount of pressure still in the system.

Ok, I pulled a vacuum on it and then charged it up today.
Cooling down to 40 front and back.

I put in a 3 ounce tin of oil in, then a 12 ounce can with leak detector, then a 12 ounce can with stop leak, the another 8-10 ounces of generic.

Anyone know what the low side pressure and high side pressures should be? (2008, 5.7L, front and rear a/c.)

I can remember what the low side was when I was done, 30-50ish maybe, but the high side was about 275 at idle and about 325 at 2500 rpm.

I didn't flush the system, because I didn't know if I should or know how. I assumed that most of the oil was intact, minus what is in the freon that leaked out, minus what I may have vacuumed out. so I added the 3oz tin of PAG-46 oil and hoped for the best.

08, Commander, Overland, 5.7L HEMI, QD-II

Last edited by vjsimone; 05-10-2019 at 11:14 AM.
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