piston hole? August 24, 2011, 03:00:19 PM What is the round hole for? There from a 91 HO engine. Quote Selected
piston hole? Reply #1 – August 24, 2011, 03:20:30 PM Usually an orientation mark showing which way to install the piston IE: hole,notch goes toward the front ,,, however I have never seen a circle like that myself Quote Selected
piston hole? Reply #2 – August 24, 2011, 03:25:11 PM It designates FRONT. Their are all kinds of markings in different engines. Why Ford did it this way i have NO CLUE. Quote Selected
piston hole? Reply #3 – August 24, 2011, 03:25:57 PM Yeah, I thought maybe but I've never noticed it on the other SO's I've had. So that should be to the front then rite? Quote Selected
piston hole? Reply #4 – August 24, 2011, 03:27:35 PM Ok awesome, thanks for the quick answer. Now I can finish the pistons tonite Quote Selected
piston hole? Reply #7 – August 25, 2011, 06:56:41 AM Quote from: hypostang;365959Usually an orientation mark showing which way to install the piston IE: hole,notch goes toward the front ,,, however I have never seen a circle like that myself Can anyone identify the long slot in this piston?? And what it DOES?? On this photo posted by hypostang?? Quote Selected
piston hole? Reply #8 – August 26, 2011, 12:06:11 AM I am guessing some type of oil drain for oil cooling? Quote Selected
piston hole? Reply #9 – August 26, 2011, 12:22:37 AM I have no idea what that slot is for , I grabbed the pic from Google images . Quote Selected
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