question about thirty piston rings

Through this site I found rings on the HASTING RING web site If you have your bore size, and ring thickness you can match up rings by going under caterpillar tractor on the Hasting site. For my D2 the rings run about $175, about half what Cat wants

I don't think you would want to purchase rings ahead of time. Tear it down and examine what you have to work with. You may want to have the ring grooves machined out to an oversize so you can use shims or wider than standard rings. Also the pistons/cylinders may be oversize already or require boring oversize etc.

Just too many variables!

There are places that can make the rings to any size required, you just need the measurements.
For example
http://www.ringspacers.com/

I expect if you can find the rings you need from Hastings etc you will be able to get them cheaper than a custom build, but I don't know that for sure. The website had lots of measurement information etc.

Sorry, I neglected to say I have my motor torn down so I could take accurate measurements

I have installed new rings, with the top ring machined wider, But someone put the oil ring in the second from bottom groove. This does not look right to me because the bottom groove has a series of holes in the groove were the second from bottom does not, I can not find info on were the proper groove the oil ring should be installed. I think it should be in the groove with the holes but can someone point me in the right direction.

On my thirty the oil ring was in the bottom groove. Paul

Thanks Paul,

I know that it was probably a dumb question but based on what someone else had done before me it made me question "if I was doing it right". I guess that there are no stupid questions, but there are some stupid answers.

My D4400 pistons have 2 oil rings per piston. One below the wrist pin and one above.

[img]http://c2.ac-images.myspacecdn.com/images02/44/l_f549d7643e0b4081ad6a68eb784e953d.jpg[/img]

Erik,

I used Hastings for my TEN. I bored the block and installed liners to bring it back to the original bore. I contacted Hastings and gave them the bore diameter and the width of the ring grooves. The TEN uses two oil rings per piston too. One above the pin and one below. Let them know how many oil rings and how many compression rings you need and I'll bet they will find exactly what you need in their vast database.

Pat

if yours req. two oil rings then did both grooves have holes in them like the one in the pic.