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Old 08-04-2013, 09:54   #1 (permalink)
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Question Rattling 5.4L?

I've got 2000 F150 that has a rattling noise coming from the engine. I took the belt off and it is not anything belt driven. It's not a knocking sound but more of a rattle. This thing is driving me nuts! Had the motor rebuilt about 90,000 mile ago and it runs fine, just has a rattling sound. It does it sitting still so nothing in the drivetrain. Ya'll got any ideas?
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Old 08-04-2013, 11:48   #2 (permalink)
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Re: Rattling 5.4L?

Possibly the timing chain/tensioners, flywheel cracked etc. What area of the engine do you hear it the loudest? Try a piece of hose to listen through.
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Old 08-04-2013, 21:55   #3 (permalink)
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Re: Rattling 5.4L?

Sounds like timing chain tensioners or perhaps the cam phasers if that model has variable cam timing.
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Old 08-05-2013, 04:45   #4 (permalink)
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Re: Rattling 5.4L?

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Possibly the timing chain/tensioners, flywheel cracked etc. What area of the engine do you hear it the loudest? Try a piece of hose to listen through.
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Sounds like timing chain tensioners or perhaps the cam phasers if that model has variable cam timing.
It sounds like it's coming from the front of the motor. They didn't start using cam phasers until '04. This is '00 so it doesn't have them. I'm leaning towards timing chain tensioners.
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Old 08-05-2013, 06:14   #5 (permalink)
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Re: Rattling 5.4L?

Checked crankshaft pulley ?
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Old 08-05-2013, 06:17   #6 (permalink)
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Re: Rattling 5.4L?

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Checked crankshaft pulley ?
No. But I will before I tear everything down. The motor still makes this sound with the drive belt off, so I think it is something inside.
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Old 08-27-2013, 05:52   #7 (permalink)
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Re: Rattling 5.4L?

Finally got around to tearing it down. It has a broken timing chain guide. A lot of work getting there, but at least an easy fix.
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Old 08-27-2013, 06:13   #8 (permalink)
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Re: Rattling 5.4L?

Good to hear you got it fixed,thanks for updating the forum.
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Old 08-27-2013, 17:26   #9 (permalink)
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Re: Rattling 5.4L?

Thanks for the update and great that you got it sorted
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Old 08-29-2013, 08:19   #10 (permalink)
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Re: Rattling 5.4L?

Only problem now is one of the guide bolts was cross threaded when the engine was rebuilt. Gonna have to put a helicoil in it.
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