Ring orientation

[Spoody6677]

717 gs engine, do piston rings have a orientation on the piston end cap, seems to confuse, please make it simple in reply

 

[Spoody6677]

1st groove nearest pin, 2nd groove

 

[Spoody6677]

1st groove nearest pin, 2nd groove

End gap, not cap

 

[burtshaver2021]

Is there not a locating pin in each groove?

 

[burtshaver2021]

I’m not sure I understand what your asking? Sorry. The ends of the rings go around the locating pin, concave side of the ring goes up, don’t know the year of your machine but looked up the specs for a 97 GSI with a 717 ring end gap was .010 min to .016 max

 

[Spoody6677]

Is there not a locating pin in each groove?

OK, let say starting groove #1 being coming from bottom of piston

 

[Spoody6677]

1st groove nearest pin, 2nd groove

omitted this part of thread

 

[burtshaver2021]

I’m not understanding, I’ve only ever rebuilt using single ring pistons. Your using a dual ring correct? You have 2 rings for each piston? Is there a locating pin in each groove on the piston?

 

[Spoody6677]

717 gs engine, do piston rings have a orientation on the piston end cap, seems to confuse, please make it simple in reply

gap sorry type error is the orientation maybe 180 degree, from other ring

 

[Spoody6677]

I’m not understanding, I’ve only ever rebuilt using single ring pistons. Your using a dual ring correct? You have 2 rings for each piston? Is there a locating pin in each groove on the piston?

Is the end gap location, 180 degree from other rings end gap

 

[burtshaver2021]

I understand what your asking, should the end gap if the second ring be 180 degrees from the gap of the first ring. I would really think that each groove would have a locating pin which would determine where the end gap will be as the pin stops the ring from rotating. Is there a locating pin in each groove of the piston?

 

[Spoody6677]

I will look at groove and let you know

 

[burtshaver2021]

 

[Spoody6677]

Is it the same for the second/top ring

 

[burtshaver2021]

Does each groove have a locating pin? Maybe post some pictures of your piston. If there is not, I wouldn’t know where the end gap would go. The attached picture shows the locating pin in the end gap of the ring.

 

[Spoody6677]

Should both grooves have a pin, I am away from my garage, but will check in morning

 

[burtshaver2021]

I have never used dual ring pistons but I would think that each groove would have a pin

 

[Spoody6677]

Thanks

 

[mikidymac]

Yes, all 2-stroke pistons have locating pins for all rings. These are not like automotive rings.

Also all rings have a stamp on them that faces up.

If they are aftermarket pistons then both rings are the same, if OEM one is an "L" ring and the other is a trapezoid so you can't get them wrong.

 

[tobytd]

2 locating pins one in each groove
they are indexed so the ring can’t get into a port opening

 

[Spoody6677]

Should I put gasket sealant along with gasket, on crankcase head, and cylinder jugs gaskets, on a 717 2stroke

 

[mikidymac]

Follow the service manual.
Gaskets go on dry, cylinder o-rings get 518 and use the loctite and grease on the correct bolts.

 

[Spoody6677]

Follow the service manual.
Gaskets go on dry, cylinder o-rings get 518 and use the loctite and grease on the correct bolts.

Is there a over counter that I can substitute for 518

 

[burtshaver2021]

518 is pretty available, order on amazon and will be in, in a couple days

 

[Spoody6677]

But need something for AM tomorrow