We ship and receive Cylinders daily, and we do an initial inspection during receiving of new cylinders received for repair or overhaul.

The cylinder is completely stripped of all components, including valves, springs, rockers, and pistons. Parts are chemically degreased in hot solvent solutions and sometimes media-blasted to remove carbon deposits and stubborn debris.

Technicians perform dimensional checks to ensure all parts meet required tolerances. Non-Destructive Testing (NDT)—such as Magnetic Particle Inspection for steel parts (crankshafts, rods) and Dye Penetrant Inspection for aluminum heads—is used to identify microscopic cracks or fatigue.

• Cylinder Barrel: The bore is measured and, if within limits, honed to a specific cross-hatch pattern to allow new piston rings to seat. If worn, it may be oversized or plated (e.g., chrome or Cermi-Nil).

• Cylinder Head: Valve seats are ground, and valve guides are often replaced to ensure a perfect seal.

In a true overhaul (as opposed to a simple repair), certain parts are always replaced regardless of condition, including piston rings, seals, and gaskets. High-quality overhauls also replace exhaust valves, springs, and keepers.

The cylinder is reassembled with new or refurbished parts, ensuring all clearances (such as ring gaps and valve stem-to-guide clearance) are within manufacturer specifications

Once installed on the engine, the cylinders must undergo a strict break-in procedure. This typically involves:

• Using straight mineral oil (non-dispersant) for the first 25–50 hours.

• Running the engine at high power settings (65–75%) to create enough pressure to seat the piston rings against the cylinder walls.

• Avoiding prolonged ground runs to prevent "glazing," which can stop the break-in process and lead to high oil consumption.