On and off clicking noise - Ford Mustang Forum
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post #1 of 3 (permalink) Old 03-24-2018 Thread Starter
careck200's Avatar
Joined: Mar 2018
Posts: 2
Therer is and on and off clicking aound coming from my engine. It goes on for 3 seconds, off for 4, and back and forth. Sometimes it happens, sometimes it doesn't. Have not been able to associate it with any particular temp, time of day, fan, AC, Gear, Etc. Just sometimes it clicks back and forth. Sometimes it doesn't. I found the clicking was caused by a triangular end piece at the bottom right of the engine attached to the serpentine belt. Specifically when the piece switched between rotating and not rotating. I'm only average with engines, so I don't know exactly what part of the engine that is. Particularly because this is my first Ford and Mustang. Please see attached pictures and tell me what you think.
History: Vehicle is a rebuilt salvage. Serpentine belt recently replaced. Passed California Smog.
2006 Ford Mustang 4.0L V6 Automatic

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post #2 of 3 (permalink) Old 03-25-2018
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Dana W's Avatar
Joined: Jul 2009
Location: Oviedo FLA
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That is the air conditioner compressor clutch. It is normal for it to cycle on and off in response to the demand level set by your A/C control on the dash. Once the demand level is reached, the compressor turns off, then when the temperature changes away from the demand level, it turns back on again.

However, 3 or 4 seconds seems a little rapid to me. Maybe you should have a shop check out the A/C system.

130 total pounds of Pitbull ruled by 8 pounds of cat.
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post #3 of 3 (permalink) Old 03-29-2018 Thread Starter
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Joined: Mar 2018
Posts: 2
Thank you so much. Considering my AC doesn't work (Well) That makes perfect sense. Thanks you.
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