I'm having compression issues with my year 2000 TD5 and I wonder if anyone has any info on piston rings. My pistons are standard and probably original but after fitting new rings I'm finding a loss of compression. After a lot of head scratching (and eliminating everything else it could be) I did some investigating into the rings. I have been told that rings suitable for my original pistons are no longer available and that I need new pistons c/w compatible rings.

Is that true? I'm find it a little difficult to believe.

Could you be losing compression via injector seals or poor valve seats or stem seals.

Does compression improve with a thimble of oil in the bores? did you deglaze the bores before rebuilding?