Piston Ring Oil Consumption

Oil consumption is a known issue but why it occurs and how to avoid it are things that are fully understood until today.

Piston ring oil consumption. The piston rings are there to prevent oil from entering the combustion. The class action alleges defective piston rings are prone to premature wear and excessive engine oil consumption that causes damage to the ecotec engines. September 19 2020 a gm piston ring lawsuit failed class action certification and was mostly. Oil collecting on the stems of intake valves is sucked into the combustion chamber during normal operation.

Check for oversize cylinders and use of standard ring set. Improving heat transfer from the piston to the cylinder wall. Oil consumption primarily occurs near or through the combustion chamber either downward through valves or upward past the piston ring pack. A piston ring is a metallic split ring that is attached to the outer diameter of a piston in an internal combustion engine or steam engine.

To better understand ring related oil consumption let s look at piston and piston ring design. The consolidated class action lawsuit. Worst of all your oil level will continue to decrease making it necessary to constantly top off oil. General motors vortec engines allegedly have piston ring problems that cause oil consumption.

If you have worn out or damaged piston rings oil will be able to seep through them and then enter the internal combustion chamber this will cause the oil to burn while carbon deposits form on the piston rings and cylinders. Oil washing is an indication of engine oil passing through the piston rings see photo 1. This list is to be used when the engine is disassembled and pistons and rings are available for inspection. Incorrect set for job.

Maintaining the proper quantity of the oil between. Sealing the combustion chamber so that there is minimal loss of gases to the crank case. The piston ring liner system is a major source of lubricating oil consumption design approaches to minimize cylinder bore distortion and lube oil consumption include increased piston ring conformability specialized liner surface finish piston ring stability piston design and minimizing lubricant evaporation. On the other hand most oil consumption is through the pistons and piston rings which is where our story goes next.