Author Topic: UPDATE;;;; engine vibration at 1800 rpm  (Read 666 times)

Offline crash340

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UPDATE;;;; engine vibration at 1800 rpm
« on: May 02, 2015 - 09:09:05 PM »
The good news,,, its not the engine or trans.

I dropped the belts off the Alt and PS this morning, fired it up and its as smooth as a gravy sandwich!!!!! Put the PS belt back on, same gravy sandwich. took the fan off (flex fan) put the Alt belt back on and vibration back to some degree. put hand on Alt and run the revs up and its buzing vibrating like a biotch, bit hard to test the fan. Loosened the Alt belt, no difference, bearings in the Alt are great, no movement. I did re-build the Alt yesterday as the one that was in the car was dodgie. the front bearing housing was flogged out and the bearing was just floating, one of the three bolts that holds it all togeather was stripped etc so I replaced the housings using the old stator, free spins nicely now but, has this vibration.
Any idea's??????
Greg

73 Cuda
Brisbane, Australia




Offline 734406pk

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Re: UPDATE;;;; engine vibration at 1800 rpm
« Reply #1 on: May 02, 2015 - 09:26:28 PM »
With the vibration issue being located in the alternator, I would try another alternator complete with the pulley.
1973 Challenger 440 6 pack auto 3.91 rear
2012 Dodge Ram 3500 dually 6.7 Cummins Fleece EFI Live
1973 Challenger 318 2bbl auto 2.73 rear 22.5 mpg RIP
1970 Challenger TA 340 4bbl auto-Sold and sad
1999 Dodge Ram 3500 dually 5.9 Cummins Fleece tuned VGT-sold
1995 Kawasaki ZX1100E & still alive

Offline crash340

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Re: UPDATE;;;; engine vibration at 1800 rpm
« Reply #2 on: May 02, 2015 - 09:57:55 PM »
Im ordering one from RockAuto as we type
Greg

73 Cuda
Brisbane, Australia