OIL PRESSURE RELIEF VALVE COPPER WASHER [6K431]

1 x Copper Washer

• The oil pressure relief valve consists of an aluminium plunger with a heavy spring behind it.
• Access is through the 15/16″ domed cap nut beside the dizzy this is what the copper washer is placed and where it seals, once this nut is removed the copper washer and a long spring will be visible. The plunger is beneath the spring and will probably be stuck, requiring encouragement to come out.
• Briefly cranking the engine over will usually free the plunger.
• in severe cases a thread tap can be screwed in to grip the plunger from the inside to draw it out.
• To prevent the plunger seizing in the future disgaurd the aluminium plunger and replace it with a steel ball see part no. BLS916.
• The harder ball will never become galled or pitted and therefore won’t get stuck.
• This spring part no. 6K858 and ball assembly once installed should give you a steady 75 PSI @ high RPM.
• To prevent oil leaks, it is always a good idea to replace this copper washer part no.6K431 under the domed nut.
• 1 Required per vehicle.
• Suits both Mini & Mokes.