Piston Ring Supplier

I use Total Seal in Arizona. They can make any ring you need. Just call them with the dimensions.

Dongya are exported all over the world and different industries with quality first. Our belief is to provide our customers with more and better high value-added products. Let's create a better future together.

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I&#;ll look through my piles of supplies, I&#;m 99% sure I have a ring that will work for your application. If you want a used ring.. I call them &#;Tried and True&#;..

What you need to look at is the ring gap with your old rings: This is a good indication of how worn they are.

For a 3.50&#; bore, the ring gap should be no less than .014&#; and not over .025&#; . These are very general specs.

Some engines are a bit more specific with the range of gap preferred.. A good average is .004&#;-.005&#;/inch of bore.

Check the gap with a ring up near the top of the cylinder bore, this is where the greatest wear usually is, Then use one of your pistons without rings or pin to push the ring down to the middle of the cylinder bore, the ring gap will close up.

Contact us to discuss your requirements of Piston Ring Exporter. Our experienced sales team can help you identify the options that best suit your needs.

If the rings are worn, or the cylinder bore worn or has a lot of taper, [wide at the top, correct at bottom] then the ring gap will clearly show it.

Reassembling an engine with used rings has a high likelihood of the rings not sealing or seating very well. The bores do not wear perfectly round, and a ring usually will find it&#;s &#;spot&#; and then the ring will wear the same as the bore.. so if you don&#;t get the rings back on the same piston, in the same groove, in the same position on the piston, the oval wear patterns may not match, and you will have to endure some oil burning and compression loss, until either the rings rotate around in their grooves and get back to their &#;spot&#;.. or wear to fit tighter against the cylinder wall.

All that said, usually our engines run ok with reusing old rings,, but don&#;t expect low oil consumption.

Greg Long

Post by Eagle » Sat Jan 28, 3:49 am

Dear Nate,
Dear Dcal,
Dear Modok,
Dear engineguyBill,

Many many thanks for all your replies.
Now, it is very very clear to me.
If I am using any forged brand ( which I do use for the competition engines ), they do come with NPR or NPR type nitrided steel rings. I understand from your explanations that as long as I am getting the honing correct it would not matter if the cylinder is plain or ductile iron sleeved. This is a relief for me since I was on the correct direction.
For me, more challenging part was the choice of cast pistons with rather thick rings combinations. I now understand that if there is a Moly faced ring option is available, I better opt for Moly face that rather than the plain or ductile iron rings. Chrome faced rings should better be avoided for my type of builds.
Also, if I did understand correct, if available, I would better use thinnest possible ring combination on the cast pistons as well. It seems that, nowadays, some aftermarket cast piston manufacturers also redesigning their pistons for rather thinner rings than the original heavy and thick rings. To find suc a piston for the application is certainly beneficial.
Again, many many thanks to you all.
All the best,
Kerem

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