Piston/Ring issue???

[Bob Mulry]

If you have access to a lathe with a 4 jaw chuck you can chuck it up and zero one side of the groove and then indicate the other......

A wavy groove would show up pretty fast............

Or...

You could use a surface plate and a height indicator on both sides of the groove......

And a plus would be that YOU knew for sure....

Just a thought from an old machinist guy,
Bob

[Mark Yacavone]

Originally Posted by Bob Mulry

If you have access to a lathe with a 4 jaw chuck you can chuck it up and zero one side of the groove and then indicate the other......

A wavy groove would show up pretty fast............

Or...

You could use a surface plate and a height indicator on both sides of the groove......

And a plus would be that YOU knew for sure....

Just a thought from an old machinist guy,
Bob

Too high tech for me ,Big Guy

I'd take a black felt tipped marker and color in the groove. Put the ring on and
squeeze it and spin it around a little by hand. You should see what's going on.

[RJ Sledge]

I appreciate all the advice, and I guess I need to let this thing play out. I don't want to mention any names right now, don't think that would be beneficial at this time.

After several phone calls on Friday, I was able to make contact with the ring people, they told me all several of my cast 2d rings were bent. All my steel top rings were fine. They are giving me a set of 1.5mm 2d rings made to my specs. They are sending my cast 2d rings back and told me I could try and take the bends out. They are charging me only for 2d day delivery ($31.50) for everything. Seems they are trying to make things good.

I don't know how you bend "several rings" and not all. I am not the brightest bulb on the tree and I may have inadvertently "bent" them while installing them on the pistons, but don't see how. A .8mm ring with a .130 radial thickness, is like a well done straw of spaghetti and installing it on a piston is effortless. I did have these rings on and off about 2 dozen times while I was lapping the spacers (at their direction). They(rings) were sticking from the first installation.

Hopefully I will receive my pistons and rings soon so I can renew my effort to finish the motor.

Thanks again for the advice, it is surely appreciated.

RJ

[carl hinkson]

Originally Posted by RJ Sledge

I appreciate all the advice, and I guess I need to let this thing play out. I don't want to mention any names right now, don't think that would be beneficial at this time.

After several phone calls on Friday, I was able to make contact with the ring people, they told me all several of my cast 2d rings were bent. All my steel top rings were fine. They are giving me a set of 1.5mm 2d rings made to my specs. They are sending my cast 2d rings back and told me I could try and take the bends out. They are charging me only for 2d day delivery ($31.50) for everything. Seems they are trying to make things good.

I don't know how you bend "several rings" and not all. I am not the brightest bulb on the tree and I may have inadvertently "bent" them while installing them on the pistons, but don't see how. A .8mm ring with a .130 radial thickness, is like a well done straw of spaghetti and installing it on a piston is effortless. I did have these rings on and off about 2 dozen times while I was lapping the spacers (at their direction). They(rings) were sticking from the first installation.

Hopefully I will receive my pistons and rings soon so I can renew my effort to finish the motor.

Thanks again for the advice, it is surely appreciated.

RJ

Use a ring expander instead of spreading them by hand.