| Re: [GMCnet] Did you know your timing mark can MOVE on Olds engines? I didn't. [message #326317 is a reply to message #326316] |
Fri, 24 November 2017 19:28   |
James Hupy
Messages: 6806
Registered: May 2010
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Senior Member |
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Some engines are "internally balanced" like a 327 chev from the 60's.
Others, like the small block 400 2 bolt main chev engines are "externally
balanced". If you really want an engine to shake, bolt a 327 balancer and
flex plate on to a 400. Been there, done that, still got the broken crank
somewhere in my junk pile. Broke the block too.
Jim Hupy
On Nov 24, 2017 5:21 PM, "Ken Henderson" wrote:
> I can't imagine anyone balancing a crankshaft with an external engine
> component, like a flex plate or harmonic balancer, or hub, attached. What
> if one of those requires replacement on an assembled engine? Disassemble
> the engine to re-balance? Seems much more logical to me to balance each
> component individually. One might, in an especially critical application,
> then test their balance while assembled, but even then, if a system
> imbalance appeared, I'd want to find and correct the out-of-balance
> component.
>
> JMHO,
>
> Ken H.
>
>
> On Fri, Nov 24, 2017 at 8:05 PM, Rob Mueller
> wrote:
>
>> Jim,
>>
>> My experience with "good overhaul shops" is that they balance the crank
> by
>> drilling holes in the counterweights to lighten them or
>> filling the holes with lead to increase the weight.
>>
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