أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
The pressure inside the cylinder is variable depending the position of crankshaft and depending the load. So the pressure is not constant.
By doing the preventive maintenance in time and with the engine oil having right viscosity and quality grade. Keep the air intake and cooling sytem properly maintained.