Originally Posted by sai charan
what is the use of sump plug washer?what will happen if we dont replace it with new one
Its the washer that doesn't allow oil to leak from engine. Just like rubber washer used in water pipe fittings.
As engine oil gets worst after long run (i.e after 7500 KM's), the washer also does (i.e Due to high temperature of engine) and also the old washer will be flattened when the bolt is tightened previous.
Left side is old washer which is flattened and right side new washer. The same will be worst if the old washer is rubber based.
So its better to replace to new one on every oil change. It doesn't cost much either and there will be no doubt of oil leakage.