Excavator Engine Liner Kit

If you've got a Doosan DX340LCA with the DE12 engine that's started blowing blue smoke under load and going through oil fast, you know the problem isn't just one worn part. The cylinder liner, excavator engine piston, piston rings, and piston pin all wear together over thousands of hours on the job, and swapping just one will only lead to blow-by and repeat failures. That's why we put together this matched excavator engine liner kit, made specifically for the DE12 engine, so you can replace everything in one go.

The cylinder liner in this kit is cast from high-grade alloy iron, with a plateau-honed crosshatch finish that matches the factory spec exactly. This helps the new rings seat quickly and hold oil without scuffing, even in the dusty construction sites these machines work in. The excavator engine piston is heat-treated and coated with a graphite anti-scuff layer, which we've seen hold up better than standard uncoated pistons in high-hour machines. The piston pin is induction-hardened and centerless ground to stay round, so it won't egg out and cause knock under full load. The piston ring set includes two compression rings and one three-piece oil control ring, all sized to fit the liner and piston perfectly, no guesswork needed.