Cummins 4BT – Pressure Relief Valve Replacement – Bosch P7100
19 mm Remove the pressure relief valve and copper sealing washer. Use a small screwdriver to check that the check ball is not sticking in the high pressure relief valve assembly. Caution: A sticky check ball will result in engine low power. Thoroughly flush the high pressure relief valve with cleaning solution. 10 mm, 19… Read More »