jaxcam02

iTrader: (1)

I just finished doing a head and cam swap on my LS1. I tried google searching for the answer but couldnt really find it.

Every single one of my pistons had a tiny little hole machined into them. They were all at the 3 o clock position IIRC.

Is that a balancing hole, or something else?




example of the hole. not from my engine

KCS

iTrader: (20)

Those holes are to indicate which way the pistons should be installed. The dots face to the front of the engine.

99 2500

The dot is used help for correct installation of the piston, they are all suppose to face the front of the engine.

jaxcam02

iTrader: (1)

awesome, thank you. I was just curious.

does it really make that much difference though. Is the rod and crank offset a tiny bit to make a difference?

Che70velle

iTrader: (6)

Yes, piston pins are offset on most, if not all LS engines.