O.S. Engine OS28154000 Heatsink Head GT15HZ cylinder head for GT15 RC nitro engines  [OS28154000]

Heatsink head for GT15

This O.S. Engine heatsink head OS28154000 is an RC-scale cylinder head designed as a direct replacement or upgrade for GT15 nitro engine applications where the original part designation GT15HZ is specified. The text focuses on fit, installation considerations, and its role in tuning rather than promotional claims.

Compatibility is limited to GT15-designated engines, so confirm the engine code on your model before installation. The head provides a finned heatsink form factor that interfaces with the engine’s cylinder and head studs; correct torque on the head screws and clean mating surfaces are essential to maintain sealing and predictable thermal behavior on the model.

From a tuning perspective, this cylinder head is used to influence combustion chamber temperature and cooling characteristics during runs. When swapping heads, verify clearance with your glow plug, carburetor intake, and any bodywork on the RC model, and perform a warm-up and idle check before full-power testing.

Use this heatsink head as a like-for-like replacement for GT15 engines to maintain consistent cooling behaviour during tuning and track sessions, and follow standard RC nitro engine maintenance and torque procedures when fitting.