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Old Jan 30, 2022 | 02:20 PM
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Engine rattle

I've got a 2016 F150 with the 5.0 V8. It has a very distinct rattle in the engine during acceleration. I can only hear it at low speed mainly 1st and 2nd gear around 1800 rpms. It almost sounds like a knock. I'd say peak rpms before shifting during normal driving is the only time i hear it. When revving the engine in neutral it sounds fine. Has anyone experienced this?
 
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Old Jan 31, 2022 | 01:20 PM
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Check the heat shields on the exhaust to see if any are loose.
 
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Old Feb 1, 2022 | 07:06 AM
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Ditto on the heat shields. Had that problem on a Tacoma I once had. It could also be the gas you're using. I noticed a knock/rattle in my 2020 F150 at low speed....1st or 2nd gear. Tried a different brand of gas and don't hear it. Just a thought.
 
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Old Feb 2, 2022 | 05:44 AM
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The welds on one of my heat shields broke and I could only hear it if I was in a drive though or going past something. A simple clamp fixed that, no more noise.
 
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Old Feb 2, 2022 | 11:29 AM
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Originally Posted by tseekins
The welds on one of my heat shields broke and I could only hear it if I was in a drive though or going past something. A simple clamp fixed that, no more noise.
+1

Dang heat shields are typically tack-welded at the corners, and sometimes a couple more places. Any one of them cuts loose, and you have a custom-made rattle generator. Also check the shields on the catalytic converters.
 
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Old Feb 6, 2022 | 01:38 PM
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Believe it or not, a worn belt tensioner can also make the sound you mentioned.
 
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Old May 9, 2024 | 05:15 PM
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Originally Posted by gcardwell2
I've got a 2016 F150 with the 5.0 V8. It has a very distinct rattle in the engine during acceleration. I can only hear it at low speed mainly 1st and 2nd gear around 1800 rpms. It almost sounds like a knock. I'd say peak rpms before shifting during normal driving is the only time i hear it. When revving the engine in neutral it sounds fine. Has anyone experienced this?
have you found out what this is ? Mine does the same thing !
 
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