Why are balance gears bad?
 

I've seen many references on here to the balance gears being a bad thing. Just wondering why. :bigthink:

From what I understand they can come apart and destroy an eninge. What little they offer isn't worth the problems they could cause. I am sure others will give you more detail, this is just what I have read.

Ill give you my .02 worth

I pull them out of every eng I have that have them. I see no differance in the way they run, or shake. Ive pulled many out for people that have had nocks in the eng, and for some reason, the noise goes away.

The pin that they ride on or the gear it self gets worn and then they go out the side of the eng cause a small problem with the, positive crank case ventalation. Engs seem to run better with out that ventalation hole in the side of the block.

You can pull the pan off the 12's and get them out, PITA! 14's you have to pull the crank out.

Good luck! And this is a pick of Positive Crank Case Ventalation! :biggrin2:

Balance gears
 

I am in the finishing stages of a rebuild on a K321. when I tore into it the balance gears were loose on the shafts and wobbling Big Time. Its like they were about to come apart, in fact I don't know how they meshed with the crank, etc. I left them out of the rebuild. Had they came off the shafts something would have wrecked the entire engine without a doubt.
Dave in SW Missouri

I just got a 129 the motor is rattling.I wonder if the gears in it are loose could I get some more detail on removal? Other than the noise motor runs good