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AMX A/C Question |
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CamJam
Moderator Group Joined: Jan/04/2014 Location: Arizona Status: Offline Points: 6549 |
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Posted: Aug/07/2018 at 2:32pm |
The a/c on my AMX generally works fine, but once it's been running for awhile, if I restart the engine with the a/c engaged the belt slips and makes a bunch of noise. The belts are tight, and it doesn't do this unless the engine has been running for awhile and then sits, i.e. when I stop for gas. Once the car is moving again (and air is running through the condenser), I can turn the system on and there's no noise. What's going on here? Does heat soak possibly raise pressures in the system, thereby putting more load on the compressor on a restart? |
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'73 Javelin 360 (current project)
'72 Baja Bronze Javelin SST '69 Big Bad Orange AMX (2018 Teague Heritage Award) SOLD |
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19676 |
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That would be my guess, and the belt getting hot and stretching a little.
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Frank Swygert
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6768rogues
AMC Addicted Joined: Jul/03/2007 Location: United States Status: Offline Points: 6237 |
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I agree. The system did not sit long enough for pressures to equalize and if you have the original compressor it is a positive displacement pump.
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amcenthusiast
AMC Addicted Joined: Jul/02/2012 Location: SW Atlanta GA Status: Offline Points: 1778 |
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I bet your system has slightly too much freon in it; have a technician check the pressures and readjust as necessary.
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CamJam
Moderator Group Joined: Jan/04/2014 Location: Arizona Status: Offline Points: 6549 |
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Ok, thanks for the input guys. I wondered if there might be too much freon. As much as anything, I'm just trying to educate myself as to what's happening.
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'73 Javelin 360 (current project)
'72 Baja Bronze Javelin SST '69 Big Bad Orange AMX (2018 Teague Heritage Award) SOLD |
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george w
Supporter of TheAMCForum Joined: Jan/27/2013 Location: New Jersey Status: Offline Points: 2899 |
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Are you sure it's the belt slipping and not the driven ( inner portion ) of the clutch ? Cause in either case is likely to be an overcharge.
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Long time AMC fan. Ambassador 343, AMX 390, Hornet 360, Spirit 304 and Javelin 390. All but javelin bought new.
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sidewinder
Moderator Group Joined: Oct/07/2007 Location: Niagara Falls, Status: Offline Points: 6665 |
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If you have a belt gauge make sure the belt is tight to spec. I was surprised to see how tight it has to be when I did mine. That compressor pump doesn't turn over easy!! I had a similar issue but once I get the belt tight to the spec it was fine.. Chuck Page
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Chuck Page ,AKA Sidewinder
1968 "BLACK CHERRY" Javelin Previous owner of 2013 Heritage Cup winner 1970 BBO AMX |
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