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73-87 Chevy _ GMC Trucks => Performance => Topic started by: 81Cheyenne on May 25, 2009, 01:15:42 pm

Title: Internal or Externally Balanced?
Post by: 81Cheyenne on May 25, 2009, 01:15:42 pm

I bought a 5.7 Vortec crate motor (1 piece RMS). It didn't come with the harmonic balancer or flexplate. The paperwork states that the engine is a 96-97 model. My Chevy Parts INterchange Manual states that all 86 and later 5.7's are external balance yet when I do a parts search I turn up mostly internally balanced balancers and flexplates. So which is correct? Is there any way that I can tell by looking at the crank?

Title: Re: Internal or Externally Balanced?
Post by: Blue 82 on May 25, 2009, 03:50:50 pm

the balancer is neutral balanced
the flexpate or flywheel has a counterweight

Title: Re: Internal or Externally Balanced?
Post by: VileZambonie on May 25, 2009, 08:35:30 pm

It's external balance.

http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_Flywheel-Flexplate-Motormite_3922464-P_267_R%7CGRPTRANAMS_724607628___