Bleed Screw Radiator Hose will fit most BMW Vehicles 

423750HP Bleed Screw

Maintain your cooling System at all times

A Cylinder Head overhaul is composed of the replacement of components inside the cylinder head without having to remove the engine from the vehicle, such as valve and rocker arm replacement. A "major overhaul" is composed of the whole engine assembly, which requires the engine to be removed from the vehicle and transferred to an engine stand for the work to be carried out. Removal of the engine takes a lot of time so this type of work is only carried out when absolutely necessary and not during normal service intervals.