5.4 3v grinding when running
09-22-2022, 04:03 PM
#1
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5.4 3v grinding when running
I went against the advice of my brother and replaced both heads on my flex 5.4 3v. I primed and started the truck no problems. But once I started out my driveway it started to make a grinding noise. So I parked and pulled the front cover. I didn't see any obvious issues there.
.do you think I've possibly spun a bearing or something. The motor isn't knocking as much as it is grinding. I originally suspected that the chains were rubbing the timing sprocket but after inspection I found no damage. Any ideas? 2007 5.4 3v flex XLT 4x4 240,000
.do you think I've possibly spun a bearing or something. The motor isn't knocking as much as it is grinding. I originally suspected that the chains were rubbing the timing sprocket but after inspection I found no damage. Any ideas? 2007 5.4 3v flex XLT 4x4 240,000
Last edited by Jcbelt; 09-23-2022 at 12:25 PM.
09-22-2022, 04:16 PM
#2
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I went against the advice of my brother and replaced both heads on my flex 5.4 3v. I primed and started the truck no problems. But once I started out my driveway it started to make a grinding noise. So I parked and pulled the front cover. I didn't see any obvious issues there.
.do you think I've possibly spun a bearing or something. The motor isn't knocking as much as it is grinding. I originally suspected that the chains were rubbing the timing sprocket but after inspection I found no damage. Any ideas?
.do you think I've possibly spun a bearing or something. The motor isn't knocking as much as it is grinding. I originally suspected that the chains were rubbing the timing sprocket but after inspection I found no damage. Any ideas?
What year?
09-22-2022, 05:28 PM
#4
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I never fooled with a flex plate yet.
It would make a grinding sound.
Could you record the sound? Might help.
09-22-2022, 08:05 PM
#5
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Jcbelt...
.
If you're not going to provide the vehicle information in your post(s), consider putting your complete vehicle information (year, model, cab, trim, engine, wheelbase, _x4 drive, mileage, maintenance, modifications, etc., etc.) in your signature to have it automagically included when you post. *Eliminates playing 20 questions when/if a post is made in the future pertaining to your vehicle.
» Edit Signature ««« -click-
*Don't forget to [ save ] it.
.
Also... There are year specific forums which better serve non-general F-150 issues/topics..
09-23-2022, 12:08 PM
#7
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cant hear any noise when rotating manually or when starting, but once running motor has a grinding gear sound. one might think the flex plate or the timing sprocket. apon inspection i see no damage to teeth.
Last edited by Jcbelt; 09-23-2022 at 12:12 PM.
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09-23-2022, 12:10 PM
#8
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this is my first thread, but i have seen where in the past mods have been able to move the thread to a more apporitye location. are you, me or can someone move it for me or shoulkd i start a new one in the late model ford forums?
09-23-2022, 12:16 PM
#9
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Tell him where you want it, he can change it over.
09-23-2022, 12:22 PM
#10
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