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Title: piston hole?
Post by: Nate on August 24, 2011, 03:00:19 PM

What is the round hole for? There from a 91 HO engine. (http://photos-h.ak.fbcdn.net/hphotos-ak-ash4/310849_2277868784779_1190545670_32796500_835026_n.jpg)

Title: piston hole?
Post by: hypostang on 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

Title: piston hole?
Post by: TOM Renzo on 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.

Title: piston hole?
Post by: Nate on 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?

Title: piston hole?
Post by: Nate on August 24, 2011, 03:27:35 PM

Ok awesome, thanks for the quick answer. Now I can finish the pistons tonite

Title: piston hole?
Post by: thunderjet302 on August 24, 2011, 03:34:45 PM

Speed hole :mullet:

Title: piston hole?
Post by: bryan163 on August 25, 2011, 01:20:12 AM

(http://insideoutandbackwards.files.wordpress.com/2010/12/speed-holes-1.jpg?w=320&h=240)

Title: piston hole?
Post by: TOM Renzo on August 25, 2011, 06:56:41 AM

Quote from: hypostang;365959

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

Can anyone identify the long slot in this piston?? And what it DOES?? On this photo posted by hypostang??

Title: piston hole?
Post by: Haystack on August 26, 2011, 12:06:11 AM

I am guessing some type of oil drain for oil cooling?

Title: piston hole?
Post by: hypostang on August 26, 2011, 12:22:37 AM

I have no idea what that slot is for , I grabbed the pic from Google images .

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Technical => Engine Tech => Topic started by: Nate on August 24, 2011, 03:00:19 PM