This oil seal prevents lubricant leakage and blocks contaminants from entering the engine or transmission housing at the rotating shaft interface. It is installed in the bore of the housing and rides on the shaft journal, maintaining a fluid-tight barrier under normal operating pressures and temperatures. A worn or hardened seal allows oil seepage past the lip, which can lead to low lubricant levels and accelerated bearing wear. Corteco manufactures this seal to match the original housing bore tolerance and shaft contact surface, so no additional shimming or adapter is required during replacement. On reinstall, ensure the seal lip faces the lubricant reservoir and that the bore is clean to avoid lip damage.