🔧 Optimized Harmonic Balancer Installation Tool – ProForm 66515 Review

A tool screwed into the end of the crankshaft with two wrenches allowed the Harmonic Balancer to be installed in just minutes. Very smooth, no problems, no drama. could not have been better. Exactly the same as Moroso #61741 but half the price. Highly recommended!

The tool works as it should and I wish I had bought it sooner. A very solid tool. Must be used as directed. If the tool in the balancer breaks or damages the balancer, most likely it was improperly connected. There are many videos on the internet showing how to properly use this type of setup tool.

The Harmonic Balancer is properly installed. I may not need it, but I really don't like using a factory screw to set it, it's just more reassurance that it was done right. The vibration on my 2005 Chevy Astro Van has decreased since the harmonic balancer was replaced. I think it's time to balance the tires.

Purchased to install a new Harmonic Balancer on my Mark IV Big Block. It worked. I deducted 1 star because the threads were hanging from the packaging in the handle. So I had to clean the threads of the tool with a wire brush and then clean them with a carving tool. It worked but it took about half an hour to clean the tool before it could be used.

I mounted an equalizer on an SBK 305 with this tool. After a few turns, this tool cut my crankshaft off! Now if I can't get the tool part out of the crank, I have to remove the motor and either get a new crank or take it to a machine shop for repair. I spend a lot of time and money because of this tool. I believe the seller should be held responsible for the sale of this terrible instrument.