ムサシニュース
This oil seal prevents leaks of engine lubrication oil in the oil pump and also foreign substances from penetrating from the outside.
In the past, there was a special oil seal exclusive for oil pump, but in recent years, this oil seal is installed on the front side of the crankshaft and shared with crank shaft oil seal.
This oil seal is made of heat-resistant material because of the extremely high temperature in the oil pump.