When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I'm a new member. I have the feeling that someone here might know how to uncover/find the harmonic balancer runout spec. for a Gen 3 LS - my motor is a LM7. 2006 Chevy Tahoe 5.3 - gas.
The best I can dig up is a reference to GM document #PIP4750E. This document list 0.4mm as an allowable runout but doesn't explicitly call out a 5.3 motor.
I just had the original replaced and I'm not really liking the runout because it is causing the AC pulley to bounce.
I measured the runout on the grooves and it is 0.025" or 0.63mm. See picture.
This was a Delco part so not sure buying a better one is possible. The mechanic said he would not be able to guarantee a runout but would replace it. Could be that one would have to purchase a performance damper that is not made with
rubber separating the parts. Some of the performance dampers have an "internal" damping element. Any ideas?
Thanks,
-Henry
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.
Harmonic Balancer Spec. - Gen 3 LM7 
