What to replace while system is open
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New User
Joined: Feb 2011
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What to replace while system is open
1998 Expedition 5.4 4wd
I have been working with a local shop on my a/c system. He pulled vacuum initially and couldn't find a leak source. He recharged, added dye and asked me to return when the system started showing signs of low refrigerant. Today I returned and he told me the compressor body is leaking. I told him I have more time and mechanical ability than $$ right now so he agreed to pull the remaining refrigerant so I can replace the compressor.
So, my question is....are there any other items I should replace while the system is open to prevent any future issues? Any things that are very important vs just a good idea? I am working with a tight budget so I'm don't want to go crazy but I definitely don't want to have to do this again any time soon.
Thanks in advance for all advice.
I have been working with a local shop on my a/c system. He pulled vacuum initially and couldn't find a leak source. He recharged, added dye and asked me to return when the system started showing signs of low refrigerant. Today I returned and he told me the compressor body is leaking. I told him I have more time and mechanical ability than $$ right now so he agreed to pull the remaining refrigerant so I can replace the compressor.
So, my question is....are there any other items I should replace while the system is open to prevent any future issues? Any things that are very important vs just a good idea? I am working with a tight budget so I'm don't want to go crazy but I definitely don't want to have to do this again any time soon.
Thanks in advance for all advice.
Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
Likes: 5
From: Lorain County, Ohio
Compressor, accumulator and orifice tube and o-rings in their related connections.
You'll need to add back oil to the system to replace any lost in the old compressor and accumulator. About 4-5 ounces of PAG-46.
You'll need to add back oil to the system to replace any lost in the old compressor and accumulator. About 4-5 ounces of PAG-46.
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New User
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Thanks lsrx, I had the planned on the orifice and o-rings (cheap insurance) but was on the fence with the accumulator. I did some research on it and added it to the list. Pricey little piece, but since my system has been low/leaking for over 6months I took your advice and will replace it as well. Thanks again!
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Joined: May 2011
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From: Charm City
I just got the AC working in my old F250 and there is one component that I didn't replace and now it's biting me in my ***, the low pressure cut-off switch!
I'll have to have the system evacuated so I can change a simple switch that I should have done from the start...
I'll have to have the system evacuated so I can change a simple switch that I should have done from the start...
Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
Likes: 5
From: Lorain County, Ohio
I just got the AC working in my old F250 and there is one component that I didn't replace and now it's biting me in my ***, the low pressure cut-off switch!
I'll have to have the system evacuated so I can change a simple switch that I should have done from the start...
I'll have to have the system evacuated so I can change a simple switch that I should have done from the start...
Thread Starter
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New User
Joined: Feb 2011
Posts: 10
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lsrx, do I do this before taking the truck back to be pressurized? If so, where do I need to add it? Do I just need to instruct the tech to add it?
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Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
Likes: 5
From: Lorain County, Ohio
The new compressor may or may not have a full (10oz ) load of oil in it. Depends on the mfgr,
If it does, drain it completely into a clean container, measure 4-5 ounces and put it back into the suction line at the accumulator (accumulator to compressor line) after you install the compressor. Spin the comp about 20 times once you get everything assembled to get the excess out of the cylinders.
If the compressor is dry, add oil from a fresh, sealed container.
If it does, drain it completely into a clean container, measure 4-5 ounces and put it back into the suction line at the accumulator (accumulator to compressor line) after you install the compressor. Spin the comp about 20 times once you get everything assembled to get the excess out of the cylinders.
If the compressor is dry, add oil from a fresh, sealed container.
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