CUMMINS-4BT-6BT-ACCESS-HOLE-COVER

3903463 is an access hole cover for Cummins 4BT and 6BT engines, sealing one of the inspection or service openings in the block or timing case. Small as it is, this cover holds back oil under crankcase pressure, and a degraded gasket here is a common source of an oil leak that's frustratingly hard to trace back because it's an easy spot to overlook during inspection. Orange.net.za stocks this part for fast dispatch across South Africa.