Piston Ring Gap

[perry kete]

I have looked at the search function and didn't find exactly what I am looking for so I thought I would ask here.

I have had my engine bored to 20 thousands over and I have purchased new aluminum pistons and rings also 20 thousands over.

I have a piston clearance of 2-1/2 to 3 thousands when inserted in the cylinder.

I now need to check ring gap and would like to know what the ring gaps should be.

Thanks

[TXGOAT2]

You need to get information on both piston to cylinder clearance and ring end gap. Both are very important.

[speedytinc]

I have looked at the search function and didn't find exactly what I am looking for so I thought I would ask here.

I have had my engine bored to 20 thousands over and I have purchased new aluminum pistons and rings also 20 thousands over.

I have a piston clearance of 2-1/2 to 3 thousands when inserted in the cylinder.

I now need to check ring gap and would like to know what the ring gaps should be.

Thanks

Your piston clearance is too tight by 1/2. Should be .004 -.006. I go with the higher end. ,005-,006.
By memory - .018". Go with the ring mfg's recommendation.

[tmodeldriver]

Good rule of thumb for ring gaps is .003" per inch of bore diameter. A little too much is better than not enough. On a T Model engine I'd shoot for about .012". Bob

[perry kete]

John,

Thanks for the information on the pistion clearance. I went down and rechecked each cylinder at the top and bottom and I can place a .005 feeler guage next to the cylinder at both the top and bottom. I don't know why I didn't keep advancing the feeler guage size when I first measured it but for some reason I stopped when I hit .003.


Bob,

Thanks for the information about the ring gap I will check that next.

Denny