What to replace after opening the system

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rdm757
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Joined: Sun Jul 02, 2017 11:36 am

What to replace after opening the system

Postby rdm757 » Tue Jan 12, 2021 9:14 pm

I’m planning to do some work on my 2001 Dodge Ram 2500 diesel that will require opening the a/c system. The a/c itself is working great, but I will need to discharge and open the system for unrelated work. I know the receiver drier will need to be replaced when I put it all back together. Just wanted to see if I need to replace anything else like the liquid line or expansion valve. As always, appreciate the great advice I get here!
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JohnHere
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Location: South Carolina Upstate - USA

Re: What to replace after opening the system

Postby JohnHere » Tue Jan 12, 2021 10:11 pm

Quickly cap off any lines, hoses, and ports as you disconnect the parts so that air and moisture can't enter, and you shouldn't have to replace any major components but the receiver/dryer on reassembly. Replace the o-rings on the disconnected parts as well, lubricating them sparingly with Nylog Blue as you install them.

Pour out and measure any oil from the old R/D and add back an equal amount into the new one just before you install it. If no oil comes out, I would add 1/2-ounce to the new R/D anyway just to be on the safe side, plus an equal amount of oil that comes out during the refrigerant recovery process.

According to the information that I have, the specs for your vehicle are 32 ounces of R-134a and 6.25 ounces of PAG-100.
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Cusser
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Re: What to replace after opening the system

Postby Cusser » Wed Jan 13, 2021 6:56 am

I would do same as JohnHere posted.
rdm757
Posts: 12
Joined: Sun Jul 02, 2017 11:36 am

Re: What to replace after opening the system

Postby rdm757 » Wed Jan 13, 2021 7:51 am

Thank you! I appreciate the help.

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