All of the Volvo radiators offered are designed to withstand system pressures much higher than the 150kPa that is the maximum specified by Volvo. However, defective pressure caps or hose blockages can cause the pressure to exceed the radiator's designed limit, leading to damage of the radiator or the engine. ALWAYS check the rest of the cooling system for problems before assuming the job is complete. We recommend the installation of a NEW pressure cap whenever a radiator is being replaced.