Tapping noise in engine

1998 FORD EXPEDITION
178,000 MILES • 5.4L • V8 • 2WD • AUTOMATIC
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JAEDAV12
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Noise started yesterday. I don’t know if it’s a lifter tap or chain slap. Also what can be the cause of the noise and how to fix it?
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Nov 17, 2020 at 12:00 PM
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KASEKENNY
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That could be one or the other. So can you increase the RPM and see if the noise gets faster or changes at all? Maybe get the exact same video with someone reving the engine.

Here is a guide that will help get us started:

https://www.2carpros.com/articles/engine-noises

Let us know and we can go from there. Thanks
Nov 17, 2020 at 12:17 PM
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JAEDAV12
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Here you go:
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Nov 17, 2020 at 12:26 PM
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KASEKENNY
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Awesome. That sounds like a timing chain slap to me. I would replace the tensioner and guides if they show signs of wear as well. I attached the process. Let me know if you have questions.
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Nov 18, 2020 at 5:38 PM
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JAEDAV12
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Thank you !
Nov 18, 2020 at 5:39 PM
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KASEKENNY
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You are welcome. Please come back to 2CarPros next time. Thanks
Nov 18, 2020 at 6:02 PM