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wjeffcoat
wjeffcoat 11/24/2010
1989 Mercedes Benz 560SL Base 8Cyl5.6L - Transmissions & Drivetrains
Car develops a vibration in engine or transmission area when engine is accelerated to 1900 rpm's.
Auto begins viabrations appx. 1,900 rpm until 2,400 to 2,500 rpm's. The viabrations develop whether static or moving. SL 560 has 160,000 miles. Runs very good. In effort to stop viabrations, mechanics have replaced engine mounts, universal joints (?) and have suggested other things such as exhaust system (?) and something in the transmission. No one , that I have talked to, really seems to know the problem. Other than the viabration, car drives, handles and rides well. Any help will be appreciated. Thanks.
2 Answers
  • MOONSTER_TOOLZ
    MOONSTER_TOOLZ 11/24/2010
    Vehicle vibration is one of the difficult to diagnose because it occur in any driving conditions and caused by various faults. Engine vibration is may be caused by a belt-driven accessory, or a gear-driven component that is out-of-round, out-of-balance. It can also be caused by piston slap, excessive valve lash, excessive bearing clearances, deformation of parts under stress, crankshaft and camshaft deformations, etc. Other than that are vibrations caused by normal engine operating characteristics such as: cylinders firing events, rocking motions, crankshaft deflection, exhaust pulsations, etc. All engines have vibrations which are a normal part of the engine running; however, they should not be felt in the passenger compartment. I to check the clearances of the engine parts that may require an engine overhaul. Pulleys have to be checked also including the flywheel performance and harmonic balancer.
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  • wjeffcoat
    wjeffcoat 11/26/2010
    Thanks for your answer. It sounds like it may be " to much candy for a nickel"., in other words, more work than it's worth.
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