V8 piston rings

[Fatheads4ever]

Hi Guys.. I was checking the ring gap of my new rings when I noticed that the box was missing a spring tensioner on the third oil control ring. 2x times thin steel flat rings separated by a wiggly spring. The wiggly part is missing.
There are 4 ring grooves with the 4th ring being cast iron.
Can I just install 3 rings and leave the 3rd one out?
Can I install the 4th ring in the 3rd ring position?
I've got some old pistons with rings so could I use a second hand piece in the new pistons?
Ideas anyone?

Regards Kevin

[Desoto291Hemi]

The wigley piece is just an expander,,,,the thin flat rings are what cleans the oil off the cylinder wall .
They wear,,,the expander doesn’t .
You should be good if you need to reuse one .

Tommy

[Fatheads4ever]

Hi Desoto.. the 2nd hand expander is off a +40thou piston. The new pistons are +80thou that is a difference of 40thou or 1mm in metric speak. The height seems right. I'm don't want the engine to chew much oil.

[Desoto291Hemi]

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The expander is the same,,,,,the thin rings should be all that is larger o.d.
If you have new oil rails,,,,it should be good .

Tommy