BUDDAH wrote:The difference is a harmonic balance pulley as fitted by Subaru has a rubber dampener built into it the rubber ring within the pulley this is designed to absorb and eliminate vibrations that are generated buy all the other pulleys and belt. With out the dampening effect of the HARMONIC BALANCER these vibrations will be transferred to the end of your crankshaft causing the end bearing to shit its self.
Actually, glad you brought that up BUDDAH cause I've been reading a lot of differing opinions on this with some saying "it's not a harmonic balancer" etc etc -but I trust the advice of you guys foremost.
So is it a case of technically, the "it's not a harmonic balancer" statements may be true, in that the crankshaft's harmonic vibrations are not dampened by the pulley, but in reality, the pulley's dampening function is to isolate the vibrations produced by the ancillaries upon the end bearings??
I sure as hell won't be doing anything that jeopardises the longevity of those end bearings that's for bloody sure!!
The H4 crew can choose from various LIGHTENED harmonic balancers on the market, getting the best of both worlds ...but for the H6-ers? SFA!!
Even tho I've heard some good things about LCPs giving a 'revier, more alive' engine, I personally won't pursue this mod any further until a LIGHTENED harmonic balancer is available to us H6-ers. (...G'day Tim

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Thanks for your advice BUDDAH, very much appreciated.
Think I might save my money for a certain CAI that's in development...
Cheers, Jay.