O.S. Engine OS28154000 Cylinder Heatsink GT15HZ for GT15 RC nitro engines  [OS28154000]

Cylinder Heatsink Summary for GT15

The O.S. Engine heatsink head OS28154000 is a finned cylinder head intended as an alternative or replacement for GT15 engines that require the GT15HZ designation. The description concentrates on fitment, safety checks, and the head's thermal role rather than promotional language.

Use only on GT15-designated engines; verify the engine code and perform a trial fit before final installation. The finned head interfaces with the cylinder and head studs, so accurate head screw torque and clean mating surfaces are essential for a reliable seal and consistent thermal response while the engine is running.

From a tuning perspective, this head can alter combustion chamber cooling and running temperature. When swapping heads, confirm glow plug reach, intake and carburetor clearance, and bodywork interference, and run warm-up and idle checks before extended full-throttle operation.

Employ this heatsink head as a like-for-like replacement on GT15 engines to keep cooling characteristics stable during tuning and events, and follow standard nitro engine service and torque procedures when fitting.