6138-21-2220 Komatsu CYLINDER LINER

These are basically the walls of each cylinder in your engine. They’re these tough, precisely – made sleeves that the pistons move up and down inside. They handle a lot of stress from combustion – that explosion that makes your engine run. They guide the piston’s motion, seal the combustion chamber, and help transfer heat away from the explosion. It’s a core part of what makes your engine work. Without good cylinder liners, you don’t have a functioning engine. Think of it like this: the cylinder liner is where all the power actually happens. It’s the main working surface for turning fuel into motion. Everything else in the engine relies on these doing their job smoothly. Well, if these get scored, worn, or cracked, you lose compression. That means less power, rough idling, increased oil consumption, and eventually, engine failure. They act like a shield protecting the engine block itself from all that heat and pressure. You’ll notice if one goes bad – usually through a loss of power, strange noises, or seeing a lot of smoke coming from the exhaust. If you need to replace one, you can sometimes find just the liner itself, but often it's a bigger job involving a complete engine overhaul. We carry a good selection of these at Fixparts Online if you’re looking, and we can help you find the right size for your vehicle. Better than the rest: Cylinder Liner (MPN 6138-21-2220) is backed by a 12-month warranty!

About Komatsu

Komatsu is a global leader in construction and mining equipment, renowned for its durable, high-performance machinery. Originating from Japan, Komatsu continues to provide innovative solutions for the toughest industrial applications.

Why Choose Komatsu?

• Komatsu parts are built to last, even in the toughest conditions, so you get more work done with fewer repairs. • We make parts specifically for Komatsu equipment, guaranteeing a perfect fit and optimal performance. • Using genuine Komatsu parts helps maintain your machine’s value and protects your investment. • You can rely on our wide network of dealers for fast, convenient access to the parts you need, when you need them. Drive with confidence – choose Komatsu parts at FixParts Online.