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08-18-2010 07:47 PM #1
chevy 350 with a vibration issue
Hi there, I have a 69 chevelle small block 350, 4 spd sag trans, total rebuild on motor, when I built the motor it sat completed for 2 years before I installed it, I bought a standard harmonic damper from advanced auto, and now with the car at idle I can see the damper does not run true, and I have alot of vibration at idle, when I take it on the freeway my hurst shifter really shakes and vibrates, could the damper create that much vibration? I have not checked the drive shaft for balance yet because it vibrates at idle. What size damper should be on a small block 6" 7" 8"
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08-19-2010 12:36 AM #2
When you built the motor did you have the rotating assy. balanced?
Yes, a damaged damper can cause the engine to vibrate.
I run a 6" damper on my 383 with no vibration issues, an my engine is completely an aftermarket build form oil pan to air cleaner.
KeithLast edited by blwn31; 08-19-2010 at 12:39 AM.
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08-19-2010 04:41 AM #3
My question is how did you install the damper??.Good Bye
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08-19-2010 07:50 PM #4
I had the crank turned professionally, as far as the install of the damper, I honestly can't remember, but I have been reading and it should be pressed on not beaten with a block of wood, it could be time for a new one but the size has me wondering which one will work.
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08-19-2010 08:10 PM #5
You could have damaged the thrust bearing? But if your damper is not "running true" it could be damaged and will viberate I would make some calls and find out which one belongs on it.Charlie
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Could it be a 10114182? If so, it is a Gen V 454, 4 bolt 1991 (or later). Hope that helps..
GM Engine de-coding