21XZ-R Head Gasket AL0.2 - OS22014160 by O.S. Engine  [OS22014160]

21XZ-R compatible head gasket

This RC head gasket is made for use with 21XZ-R engines. The AL0.2 designation in the part name denotes a thin-profile sealing gasket that sits between the cylinder head and crankcase on compatible units.

Installation notes: remove the old gasket and clean the mating surfaces thoroughly before fitting a new gasket. Align the gasket with the head ports and bolt pattern, then tighten fasteners evenly in stages to the engine manufacturer's recommended torque. Avoid overtightening and ensure the head face is clean and flat before reassembly.

Tuning and maintenance role: the gasket preserves compression sealing and consistent combustion volume, so replacing a degraded gasket stabilizes performance and prevents the leaks that disrupt tuning. Inspect the gasket during routine servicing or if you notice compression loss, visible fuel or oil seepage, or erratic idle.