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Roley94

Arp balancer bolt

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Has anyone used an arp balancer bolt? I’ve heard you can torque the arp more than the standard bolt.

 

My bolt keeps coming loose every few months and I’m using a powerbond balancer. Torquing the standard bolt to 125nm and using plenty of loctite it still comes loose. The balancer is still a very tight press fit so I don’t think it’s been wearing on the key. 

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if it's coming loose it'll be because of vibrations, not for how much torque you can apply to the bolt.

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yeah.. it's not unusual for aftermarket balancers to struggle... but it could be something in the engine, but surely you'd notice it in other ways if it was the engine or something generically in the drivetrain that causes vibrations like that.

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It’s an XFT built engine with about 30k km and it runs smooth, I’ve never noticed or felt anything weird other than the balancer bolt coming loose often. Could it be time for a proper balancer like an atomic or Ross? 

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hmm... would be best to speak to your engine builder about what might be occurring, if I were you.

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