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engine vibration ???

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Old Aug 19, 2009 | 10:23 PM
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Default engine vibration ???

ok guys im having this issue on my car. car btw 1900 and 2000 rpms it vibrates and you can feel it on the chasis, a local mechanic said that that happens when the engine ( crank / flywheel / damper) are not balanced correctly? how true can this be. im actually changing the cam on my car this week. he said i should do the balance again to make sure it was done right the first time.

what do u guys remomend me ? ever heard of this before ??

thanks !!!
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Old Aug 19, 2009 | 10:50 PM
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If you just rebuilt the engine and replaced the crank,rods and pistons, the rotating assembly should have been balanced before you installed in the car.
But if it just started to vibrate on its own, it could be a plug a plug wire and the list goes on.
You have to isolate the problem and go from there, you'll find it but it takes time.

GOOD LUCK
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Old Aug 19, 2009 | 10:56 PM
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Originally Posted by SUNNYD 95
If you just rebuilt the engine and replaced the crank,rods and pistons, the rotating assembly should have been balanced before you installed in the car.
But if it just started to vibrate on its own, it could be a plug a plug wire and the list goes on.
You have to isolate the problem and go from there, you'll find it but it takes time.

GOOD LUCK
the engine was build by the previous owner.
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Old Aug 19, 2009 | 11:50 PM
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Originally Posted by blakvette
the engine was build by the previous owner.
and how long have you had the vibration?
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Old Aug 20, 2009 | 04:12 AM
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Originally Posted by lucky131969
and how long have you had the vibration?
Was the vibration there when you bought it or did it just all of a sudden start?
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Old Aug 20, 2009 | 07:51 AM
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it was there since ibought it. i really didnt even noticed untill i took it to the shop to get and estimate to change the cam. cas has a 605/609 112lsa cam and i want to change it for something smaller. the shop said i should take the engine apart and make sure everything was balanced to avoid problems later on. how true is this? the new engine only have about 2000 miles. as you guys can see im not the biggest expert when it comes to mechanic so im trying to get the best advise and then take it from there.

thank you !!!!!!
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Old Aug 20, 2009 | 07:52 AM
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also i can only feel it when the car is not running. the guy said its not that bad but its there.. and its only 1900 and 2000 rpm.
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Old Aug 20, 2009 | 09:49 AM
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"also i can only feel it when the car is not running"

Now I really dont understand!!!
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Old Aug 20, 2009 | 10:19 AM
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Originally Posted by SUNNYD 95
"also i can only feel it when the car is not running"

Now I really dont understand!!!
ok if the car is on a gear and u hit the 1900 rpm i dont feel the vibration ( iguess it can be that since tghe car is moving u really dont feel it) i do feel it when the car is not running and u hit the 1900 u do feel the vibration on the chasis ?
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Old Aug 20, 2009 | 11:17 AM
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A couple of things to consider, as mentioned the harmonic balancer, the torque tube, possibly bad plug wire(s), mixture.
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