One way to improve oil economy, reduce emissions, extend life cycle of combustion engine is compensation of ovality and taper in cylinders. It is clearly that clearances in the combustion chamber first of all depend on oval and taper of cylinder. Cylinder/piston clearances promote to increase of piston grooves wear and can lead to serious damage of the piston and rings.
As for sleeved engines (engines with removable liners) there is developed new method reducing of ovality from 150 to 15-20 micrometers. Developed method allows to return the cylinder/ piston clearances to original specification.
With it all cylinder sleeves remain in its original position inside engine and entire procedure takes 5 minutes per cylinder. This method allows to use old piston.
This method had been developed on the basis of similarity characters of ovality cylinder and ovality of proper circular liner compressed by two diametric opposite forces enclosed to the top of it.

So developed method allows correct cylinder deformation during life cycle of engine.
After applying of our method the oil consumption, guantity of blow-by combustion gases and guantity of toxic harmful exhaust droop approximately by 35%
http://golova.nsk.ru

 

Hi Golant, Happy to hear from you in Russia.
Your discription is intueging.
On this board, all the engines donnot use sleeves as thay are all light duty for light work, towing and personal use.
You need to contact rebuilders of heavy class trucks and industrial engines, with you procedure.
I do agree that liner (out of roundness) and taper hurt ring seal after many kilometers of running such that oil control can become a problem with it's effects on emmisions.
Good luck and keep looking.

 

That isn't anything new. It is the same as using a torque plate when honing one of our blocks. You basically want to simulate all of the same stresses of an assembled engine. IIRC, Deere has been doing this for years.