A/C went a squealing..
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Logistics Pro
Joined: Mar 2005
Posts: 4,698
Likes: 47
From: Mexico, Missouri
A/C went a squealing..
2 days ago, I was running my truck, and started the A/C. abut 3 mins into letting it run, it starting making this terrible squealing noise, with smoke and then it quit when I shut the A/C back off. The one side of the A/C line was SUPER HOT to the touch(on the driver side near the top of the radiator).
After doing some much needed research here on FTE, I did what was suggested and check the Air gap. it's about .026 give or take some. I pulled the faceplate of the clutch and there is no shim's behind the faceplate. The clutch moves when the A/C is off and also when the truck isn't running. Not completely freely, but not seized either.
Is this going to involve a new compressor and complete discharge? The only thing I could find that even closely resembled a washer was a snap ring inside the compressor housing. The faceplate with the spring load shows some metal to metal wear. I'm no einstein when it comes to A/C on auto's, but my bet is is on a new compressor..
Any ideas would be appreciated. Thanks!
After doing some much needed research here on FTE, I did what was suggested and check the Air gap. it's about .026 give or take some. I pulled the faceplate of the clutch and there is no shim's behind the faceplate. The clutch moves when the A/C is off and also when the truck isn't running. Not completely freely, but not seized either.
Is this going to involve a new compressor and complete discharge? The only thing I could find that even closely resembled a washer was a snap ring inside the compressor housing. The faceplate with the spring load shows some metal to metal wear. I'm no einstein when it comes to A/C on auto's, but my bet is is on a new compressor..
Any ideas would be appreciated. Thanks!
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Logistics Pro
Joined: Mar 2005
Posts: 4,698
Likes: 47
From: Mexico, Missouri
Tensioner is a year old, belt is 2 years old. The A/c isn't blowing very cold when at idle. After 2 attempts at running the A/C, only to have the Gawd-awful sound of screeeching and smoke, it would quit as long as I turned the A/C off. Could it really be the tensioner?
Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
Likes: 5
From: Lorain County, Ohio
Tensioner is a year old, belt is 2 years old. The A/c isn't blowing very cold when at idle. After 2 attempts at running the A/C, only to have the Gawd-awful sound of screeeching and smoke, it would quit as long as I turned the A/C off. Could it really be the tensioner?
Run the AC and spray water from your garden hose over the condenser. If it operates correctly and cools well, the fan clutch is dead or the condenser/radiator is plugged with dirt and debris.
If it still locks up and squeals, the compressor is probably toast.
To know for 100% certain, you would need to monitor the High side pressure and see where it is when the compressor gets tight.
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Logistics Pro
Joined: Mar 2005
Posts: 4,698
Likes: 47
From: Mexico, Missouri
I'm leaning towards a failing compressor. I no longer have a fan clutch installed. I removed the fan clutch and fan when I changed over to (2) 16" E-fans. I have checked the condenser and the the radiator. The radiator is 3 years old. I periodically check and clean the condenser and the rad.
I have a local mechanic here that stands by their work, and doesn't charge as much as the dealer does. I was leaning towards the thought of the compressor, so I will drop by tomorrow morning and give them the symptoms.
I have a local mechanic here that stands by their work, and doesn't charge as much as the dealer does. I was leaning towards the thought of the compressor, so I will drop by tomorrow morning and give them the symptoms.
Cargo Master
Joined: Dec 2004
Posts: 2,232
Likes: 3
From: NE Texas
It is very simple to determine if the compressor is locked up or not. Simply grab the front most of the compressor in front of the belt and see if it turns freely. If it does, then the compressor is not locked up internally. I expect that it will feel like the compressor is full of rocks.
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