TwinTurbo.NET: Nissan 300ZX forum - 95 Stock NA High Speed RPM Engine Vibration
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Subject 95 Stock NA High Speed RPM Engine Vibration
     
Posted by tiger850 on July 21, 2014 at 5:57 PM
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Message Yes this is totally Engine RPM causing vibration. Car can be in Neutral Stopped and have same vibration as 1st to 5th gear...AT the same 5000+rpm..peaks at 5800. Some think flywheel, others think trans Mount, others have said VCT. Front end was torn down and all looks good there.

95 NA with 59k miles....At 5000 rpm to redline I get a very fast frequency vibration in the engine. It can be heard like a howl. Felt in the shifter and clutch peddled ..and the entire car, Feels like my soniccare tooth brush. Accelerating hard to say 6000rpm vibration is strong then letting off the gas she really grinds and howls. Pushing in the clutch the vibration can no longer be felt in the shifter nor clutch peddle. BUT remains buzzing in noise and seat of the pants at 5000RPM+. T-belt, and clutch with flywheel resurfaced made no difference. The vibration is so bad it feels like it is robbing power from engine. Car runs great and pretty smooth below 4500. What is out of round? Car is stock everything except K&N air cleaner.

     
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