This applies only to a mechanical fuel pump on the side of the engine.
Hydrogenated nitrile natural rubber (HNBR)
Oil Seal 75x100x10 A Complete Guide
Thoroughly clean the area around the oil seal and check how it is fitted. If you cannot see the outer end of the seal, remove the timing-belt cover or chain cover (not the belt or chain) and possibly the water pump (See Replacing a water pump ) to reveal it. On an engine with a belt-driven overhead camshaft , remove the belt and its drive sprocket .