Allright, I got the new harmonic balancer on, and I test started it with the pulley attached but no belts on and I get very bad vibrations. Any thoughts on what it could be? I'm tearing my hair out.
- posted
18 years ago
harmonic balancer / torsional damper hell
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- posted
18 years ago
What was wrong with your old balancer?
These used to be balanced to your engine and if you put a new one on and got vibration, the balancer is causing it.
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- posted
18 years ago
Turns out even though I have 350 block markings, the last time the engine was rebuilt (before I owned it) it was rebuilt to 400 specs. Therefore, an externally balanced harmonic balancer was required, and I had the internally balanced version. If you have a big ol notch carved out of the rim of your balancer where the timing marking is, it's externally balanced. What a pain.
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- posted
18 years ago
If you have a 400 crank, you probably need a 400 flexplate and balancer. But its been years so I could be wrong.
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- posted
18 years ago
You're not wrong. My son and I just got through building a 400 small block. It has to have the correct flex plate with balance weights. Along with the bigger harmonic balancer as the engine is balanced externally.
Garrett Fulton