Engine knocking when giving throttle in park

2018 FORD EXPEDITION
133,000 MILES • 3.5L • TURBO • 4WD • AUTOMATIC
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FORDTRUCKS1216
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  • 2 POSTS
my expedition has a knocking noise when I give it gas in park but quiet at idle also I pulled the valve covers and ford only replaced 3 of 4 cam phasers and there is metal in my VVT solenoid screens on Both banks and in the oil puddled up under the valve cover there was a couple flakes of metal all the metal was magnetic I'm not sure what could cause magnetic metal in my oil here's a video of the sound skip to about 30 seconds to hear the noise also has no DTC's
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Jul 28, 2026 at 8:35 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Thanks for the video, yep that noise is not good, I would put your hand on the HPFP to see if this is where the noise is coming from and if so remove the pump to check the camshaft lobe which are known to wear down which will cause the noise can cause low engine power. Can I ask if there are any codes? Why didn't ford replace the last cam phaser, that seems strange. I assume they replaced the timing chain and tensioners correct? Please let me know
Jul 29, 2026 at 2:37 PM
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FORDTRUCKS1216
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it was warranty work so they just did 3 phasers and seals no chains guides or tensioners the noise isn't the HPFP I listened with a mechanics stethoscope the noise sounds like its on the bank 2 front of the valve cover could the metal be from the phasers what could cause that its all magnetic metal shavings thanks for your help
there were no codes for anything other than EVAP system fault
Jul 29, 2026 at 2:44 PM
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