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Old 04-29-2014, 05:58 PM
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Installing harmonic balancer on small block chevy

I am new to assembling engines and I have a question about installing the harmonic balancer on a SBC. I have a 1-peice rear main GM 350 crate engine that is going in my 56 Chevy. I bought the balancer installation tool and did some research including watching some videos online before installing it. One of the videos from Proform tools made it appear that it takes everything you have to wrench it on there. It even said when you think its all the way you still have more to go. Well, mine was either not quite that hard or the gym is paying off because once mine got tight, i cranked on it probably a whole complete turn before snapping the tool in half. I am pretty confident that the balancer is seated on the crank but my question is could I have damaged the crank forcing the tool to go another turn or did the tool take all of the stress? The crank and water pump pulley line up perfectly so I think it is good to go. I'm just concerned about it and want to make sure I did not screw anything up. I was able to get the broken tool out of the crank.


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Old 04-29-2014, 06:09 PM
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You didn't hurt the crank at all. No worries there. The ProForm tool isn't the strongest, I've seen them broke before if care isn't taken using them.

Don't forget to install the balancer bolt, 60-65 ft.lbs torque
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Old 04-29-2014, 09:16 PM
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you broke the tool so looks like the gym is paying off. Some balancers are loose, some are tight. Over the years I've had a few balancers that wouldn't got on at all and some that went on with a few taps. If you get a crank that's on the larger side of spec and a balancer that is on the smaller side it will be difficult to install. I usually use some emery paper on the crank and balancer to smooth and debur. Sometimes that's all it takes for a smoother install.
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Old 04-30-2014, 12:22 AM
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ya your harmonic balancer may be a tight fit so maybe honing of the entry slot may help the situation?
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