A/C Compressor question
Hotshot
Joined: Jun 2015
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I hope you didn’t damage a good part (pulley) when you were prying on it. Once you remove the snap ring the pulley should slide right off especially since it is new.
Since the compressor is getting that hot when running it makes me wonder if you added oil to it before use? There really isn’t anything in the clutch to get hot unless it is slipping. I take it that the clutch, pulley and field coil were already installed on the compressor.
Since the compressor is getting that hot when running it makes me wonder if you added oil to it before use? There really isn’t anything in the clutch to get hot unless it is slipping. I take it that the clutch, pulley and field coil were already installed on the compressor.
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Lead Driver
Joined: Oct 2016
Posts: 6,185
Likes: 633
From: Houston/Sugar Land
I hope you didn’t damage a good part (pulley) when you were prying on it. Once you remove the snap ring the pulley should slide right off especially since it is new.
Since the compressor is getting that hot when running it makes me wonder if you added oil to it before use? There really isn’t anything in the clutch to get hot unless it is slipping. I take it that the clutch, pulley and field coil were already installed on the compressor.
Since the compressor is getting that hot when running it makes me wonder if you added oil to it before use? There really isn’t anything in the clutch to get hot unless it is slipping. I take it that the clutch, pulley and field coil were already installed on the compressor.
serious..............The compressor came assembled from Rockauto. Question, will I lose any freon when I do this? Thanks Sandy
Hotshot
Joined: Jun 2015
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There is a seal on the front shaft of the compressor and o-rings seal the hoses so the answer is no. Technically, you would only lose Freon if the system is filled with R-12 since that is a brand name.
What was the reason for replacing the compressor?
What was the reason for replacing the compressor?
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Lead Driver
Joined: Oct 2016
Posts: 6,185
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From: Houston/Sugar Land
I test drove the truck to see if it would make the noise again this morning. After about 10 min it started making the grinding. Before replacing the clutch I called my bro in laws mechanic that installed the compressor. His thought was the compressor was getting hot because it was low on oil. Clutch working fine and when it should etc. We put in a 3 oz can of compressor oil and the compressor sounds normal now. Drove it home 20 min or so and still no noise. At this point I would think the oil was needed and hopefully everything is fine. I'll keep an ear on it. Thanks for all the suggestions and help guys. Any additional thoughts are appreciated. Myfourfordtrucks, I don't remember exactly why we originally replaced the compressor. I do know it wouldn't have been done if not needed. Sandy
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Lead Driver
Joined: Oct 2016
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From: Houston/Sugar Land
Wanted to bump this up again. Drove the truck 35 miles today and no compressor noise. I started reading up on compressor oil and really never knew it could and needed to be added in addition to refrigerant. There are different symptoms that you can tell when oil might be necessary. And A/C systems need to run some during the winter season also. I just wanted to post this for the folks that use the A/C hard like we do here and for those that don't use them on a regular basis. I think and hope I saved my 15 mo old Motorcraft compressor by adding oil soon after hearing the noise. Sandy
Hotshot
Joined: Jun 2015
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Compressors are shipped without oil. There should have been a note in the box stating that you are supposed to add oil to the compressor before it is installed. Most times you drain what you can out of the old compressor to get an idea of how much to add new part. Hopefully running without oil didn’t hurt it.
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Lead Driver
Joined: Oct 2016
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From: Houston/Sugar Land
Compressors are shipped without oil. There should have been a note in the box stating that you are supposed to add oil to the compressor before it is installed. Most times you drain what you can out of the old compressor to get an idea of how much to add new part. Hopefully running without oil didn’t hurt it.
"Most times you drain what you can out of the old compressor to get an idea of how much to add new part"
If the oil in mine was low and I did this, I could be low on oil from the start.
It is still running ice cold so hopefully all is well. Sandy .........Feel like temp is 107* right now here.
Elder User
Joined: Dec 2016
Posts: 854
Likes: 39
From: Mid Missouri
New Motorcraft compressors come shipped with oil for the ENTIRE system. At least mine did that I ordered off Rock Auto and replaced 15 months ago. Makes me think you have a leak somewhere?
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Hotshot
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Every(?) a/c system runs all year long. The compressor runs not only for air conditioning but for the defroster to help dry the air. The system does not use oil so it had to leak out over time around the seals
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Lead Driver
Joined: Oct 2016
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From: Houston/Sugar Land
EllieMae94
That is where I got mine from and it was 15 months ago also. That was the first compressor I watched the installation of. Maybe I mistook the dye for oil as things were happening pretty fast and they were foreign to me. Like I mentioned, I use a black light regularly now but didn't for a while after the change. My refrigerant was low once since it was installed and that is when I got the black light. I have not seen a leak since it was low but not before. I just read the RA info and it doesn't say if it is or is not shipped with oil installed, but I take your word for it. Sandy
That is where I got mine from and it was 15 months ago also. That was the first compressor I watched the installation of. Maybe I mistook the dye for oil as things were happening pretty fast and they were foreign to me. Like I mentioned, I use a black light regularly now but didn't for a while after the change. My refrigerant was low once since it was installed and that is when I got the black light. I have not seen a leak since it was low but not before. I just read the RA info and it doesn't say if it is or is not shipped with oil installed, but I take your word for it. Sandy
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Lead Driver
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From: Houston/Sugar Land
I have never used the defroster. Are you saying oil is not used in the A/C system or not used when the defroster is used? Thanks for your info. Sandy
Hotshot
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Oil is distributed throughout the entire system. The compressor runs in positions than a/c and max a/c.
I’m saying that the quantity that was put in the system is how much should be there for life or until a component is replaced or there is a leak in the system.
I’m saying that the quantity that was put in the system is how much should be there for life or until a component is replaced or there is a leak in the system.
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Lead Driver
Joined: Oct 2016
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From: Houston/Sugar Land
One thing that could have a play in my situation is that the drier was not replaced when the new compressor was installed. It is a R134 model drier. Any thoughts on that?
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