How to Deal with Engine Rust?

[CourtneyLynn]

Check the water content in the engine oil. If there is a significant amount of water, disassemble the engine to identify and eliminate the source of water. Rust inside the cylinder is usually found on the cylinder liner surface and piston rings. Severe cases require disassembly for removal. For large-scale rust spots with considerable depth, replacement of parts is the only repair option. Add a small amount of low-viscosity engine oil or diesel into the cylinder through the hole, then manually rotate the engine to allow the rust to fall off and be washed away, flowing out with the oil from the hole.