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Mar 18, 2013 | 10:48 PM

white2000

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First Post Massive Problems....

Hi all Im new to the Forum But have Read and Learned a Ton so Far!!
Heres my issue I have a 2000 V10 Excursion Ive just replaced the Motor Unfourtnatly I Threw a Rod while towing So I picked up a Low mileage 77k V10 from a local Wrecking yard.
Ive Devloped a massive vibration/humming noise @ 75-80 mph and anything after 4k RPMS. Im thinking Fan clutch or harmonic balancer.

Next issue, My rear driveshaft to pinion Bolts keep backing out, Possibly due to the vibration? Had my driveshaft checked and its true and the U joints are in good shape.

Next pinging.. Had slight pinging while towing with the old motor..totaly normal.. With this new motor its bad when im driving but sounds like the motor is gonna send the valves through the hood when im towing... 26Ft warrior toy hauler with a Buggy inside probaly bout 10k when loaded..

Any help whould be greatly Appreciated Im at Witts end with this thing.. Ive done all the obious stuff for the pinging, Air,fuel filters ect.. Thanks in advance!!!

Mar 19, 2013 | 02:24 PM

04fivefour

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From: Kettering, OH

Does it vibrate like that in neutral if you rev it up to 4k?

Mar 19, 2013 | 08:41 PM

white2000

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Yes..held my hand on the driveshaft while wife reved the motor and it about vibrated my hand off..

Mar 20, 2013 | 12:52 PM

04fivefour

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From: Kettering, OH

Something is definitely out of balance then. I would try a new harmonic balancer and if its not that i think you have some more severe problems.

Mar 20, 2013 | 01:00 PM

kornfanjoe

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Joined: Sep 2011

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From: Fraser Valley

Every drive shaft bolt should be installed with red high strength thread lock. If it's backing out it likely wasn't.
As for the vibration your on the right track so far.
Could you get a video clip of the engine running to help diagnose the "pinging"

Mar 20, 2013 | 01:12 PM

white2000

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Installed a new harmonic balancer and no luck vibration is still there
Im now starting to think maybe this motor has timing chains replaced
And they are off..that would explain the pinging and if the balance
Shafts are out of phase that would cause the vibration.

Mar 20, 2013 | 09:20 PM

Restlesswildman

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Joined: Dec 2012

Posts: 1,644

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From: SW Ohio

Have you checked the the flexplate to torque converter bolts? Motor and transmission mounts?

If it the balance shafts, timing chains were out of synch wouldn't it set a synch code? I have a diesel so I do not know the answer to this.

Keep us posted!!