Engine piston pin bushings are cylindrical bearings that reduce friction between the piston pin and connecting rod. They ensure smooth movement and durability within the engine's combustion system. These components are critical for maintaining efficient power transfer and engine performance.

Engine Piston Pin Bushings:
Size: 20mm to 50mm (inner diameter)
Grade: SAE 841, SAE 792
Material: Bronze alloy (C93200, C93700), Steel-backed with overlay
Viscosity: N/A (solid component)
Buoyancy: N/A (non-floating component)

Engine Systems:
Size: Varies by engine type (e.g., 1.0L to 15L displacement)
Grade: API SN, CK-4, ACEA A3/B4
Viscosity: 5W-30, 10W-40, 15W-40 (engine oil)
Buoyancy: N/A (system-dependent)
Material: Cast iron, aluminum alloy (block/head), steel (crankshaft), polymer (gaskets)