Piston install questions

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Apr 17, 2013 | 08:37 PM

#16

baddad457

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From: south louisiana

The package I have illustrates a half dozen different chamfers, notches, etc. Some go up, some go down. Just wanted to make sure you were aware of this. Putting an engine together is pretty easy, but the details need to be paid attention to.

Apr 17, 2013 | 10:16 PM

#17

crazy96863

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Joined: May 2011

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From: Northern California

Thanks for being so persistent with this. I missed something.

The order is fine.

The top groove has no dot or bevel. These are fine.

Sorry these pics arent the best. Camera didnt want to zoom on the ring.

The middle ring has a bevel and a dot. I over looked this assuming it was the same as the top.

Since I only installed half I inspected the rest. Half were off. Damn now I have to pull them all.

Apr 17, 2013 | 10:20 PM

#18

crazy96863

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From: Northern California

Just wanted to shout out to this site... I am assembling this 100% on tech data I find here. You guys are keeping me in check. Thanks!

Apr 18, 2013 | 05:23 PM

#19

crazy96863

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From: Northern California

Whats the purpose of the bevel? Or do they like to present more arbitrary shìt for assemblers to screw up?

Apr 18, 2013 | 08:30 PM

#20

baddad457

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From: south louisiana

I think it's for the compression pressure that makes it's way down to that ring to add additional force to press the ring against the walls harder than it would without it. It was that chamfer I could see in your previous pics that put me onto making sure you get them installed correctly. You also should check the end gaps too, to insure the gap is wide enough to prevent it from closing completely when the ring heats up. A ring gap closing allows the ends to butt together putting stress on the ring. I am guilty though of not always doing this. But so far I don't think I've ever had anything bad happen if the gaps did close.