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Old 04-17-2013, 09:16 AM   #1
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My Mustang has birds in the engine...

Not literally, I do have a highly obnoxious chirp that I initially thought was the belt, replaced the belt and it still occurs. It is worst when starting up and gets quieter as the car runs. After about 15-20 minutes of running its barely audible unless you hit the gas.
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Old 04-17-2013, 09:19 AM   #2
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Quote:
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Not literally, I do have a highly obnoxious chirp that I initially thought was the belt, replaced the belt and it still occurs. It is worst when starting up and gets quieter as the car runs. After about 15-20 minutes of running its barely audible unless you hit the gas.
Hmm power steering pump maybe? I have no idea..
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Old 04-17-2013, 09:25 AM   #3
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Wouldn't that make more noise when turning the wheel? Also, when I was just listening to try and figure out exactly where it was coming from. Sounds like it coming from somewhere in the driver side near the firewall. Of course my buddy keeps harping that is the tensioner pulley, but I have serious doubts about it.
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Old 04-17-2013, 09:57 AM   #4
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My 2007 Mustang did the same thing, it turned out to be a dry bearing in one of the idler pulleys.
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Old 04-17-2013, 10:08 AM   #5
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Sounds worth a try, what kind of lubricant did you use on it?
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Old 04-17-2013, 10:19 AM   #6
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I shot some WD-40 Spray Lithium in it, but it was only quiet for a few weeks. Ended up replacing the idler....Sorry.
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Old 04-17-2013, 10:34 AM   #7
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How much did it run you to replace it?
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Old 04-17-2013, 10:53 AM   #8
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Quote:
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I shot some WD-40 Spray Lithium in it, but it was only quiet for a few weeks. Ended up replacing the idler....Sorry.
I'd recommend doing this to one pulley at a time to isolate it. Then you can see how long it lasts before making noise again and replacing it.
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Old 04-17-2013, 11:41 AM   #9
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It was under $25 from Car Quest.
My son just reminded me that the same idler on his 2006 Roush did the same thing, and a shot of lubricant solved his problem for last 18 months.
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Old 04-17-2013, 01:50 PM   #10
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I got a idler pulley for about 50 they aren't expensive. I used a auto stethoscope to find mine. But it was in my truck not my car.
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Old 04-18-2013, 01:02 AM   #11
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I'm gonna have to do that morning after tomorrow. I priced the pulleys and could just replace them, but I'll try to just replace the one for now. Got a wedding still working on paying for.
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Old 04-18-2013, 08:17 AM   #12
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Quote:
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Wouldn't that make more noise when turning the wheel? Also, when I was just listening to try and figure out exactly where it was coming from. Sounds like it coming from somewhere in the driver side near the firewall. Of course my buddy keeps harping that is the tensioner pulley, but I have serious doubts about it.
Why doubt? That would have been my first guess. A tensioner pulley that has lost tension as they COMMONLY do will cause that.
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Old 04-18-2013, 08:31 AM   #13
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Well, I doubt it because the sound would get worse as the spring grew hotter and became more malleable instead it diminishes over time and is only loud and obnoxious when the rpms raise and diminish again as soon as they drop down.
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Old 04-19-2013, 10:17 AM   #14
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I sprayed as close to the pulleys as close to the bearing as I could since I don't have the time this Morning to tear it down. Hopefully this will work until I do have time.
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Old 04-26-2013, 07:35 PM   #15
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Bad news. The sound (since it only grew louder in the time I couldn't heck it out) is now clearly coming from the cylinder head on the driver side...
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Old 04-27-2013, 11:02 AM   #16
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Are you still under warranty?



NVM I thought you had a '10-14

That sucks!
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Old 04-28-2013, 03:36 PM   #17
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I had that once and lubricated the pulleys with WD- 40.
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Old 04-28-2013, 03:40 PM   #18
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Definitely isn't the pulleys. Sounds like it might be coming from the valvetrain. It's going to the shop thursday
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Old 04-28-2013, 05:52 PM   #19
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Good luck
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Old 05-02-2013, 05:32 PM   #20
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Good news, exhaust leak.
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