Abstract: [OBJECT] To provide a resin-made oil pan without breakage even when the oil pan strikes against an obstruction. [MEANS TO SOLVE] A bottom wall 2 of an oil pan 1 made of resin material has a front side wall section 5 that is located at a vehicle front side and a rear side wall section 6 that is located at a vehicle rear side with respect to the front side wall section 5 and continues to the front side wall section 5 at a predetermined angle. The front side wall section 5 is set so as to have an inclination so that as a position on the front side wall section 5 gets closer to the vehicle rear side, the position on the front side wall section 5 is located in a lower position in a vehicle up-and-down direction in a state in which the oil pan 1 is secured to a cylinder block mounted on a vehicle.

Abstract: [OBJECT] To provide a resin-made oil pan without breakage even when the oil pan strikes against an obstruction. [MEANS TO SOLVE] A bottom wall 2 of an oil pan 1 made of resin material has a front side wall section 5 that is located at a vehicle front side and a rear side wall section 6 that is located at a vehicle rear side with respect to the front side wall section 5 and continues to the front side wall section 5 at a predetermined angle. The front side wall section 5 is set so as to have an inclination so that as a position on the front side wall section 5 gets closer to the vehicle rear side, the position on the front side wall section 5 is located in a lower position in a vehicle up-and-down direction in a state in which the oil pan 1 is secured to a cylinder block mounted on a vehicle.

Abstract: A seal member adapted to be mounted between a cylinder head cover and an ignition plug tube comprises a mount portion interposed radially movably between an upper surface of an annular stepped portion formed around an opening of the cylinder head cover for insertion of the ignition plug tube and a baffle plate. A first seal portion and a second seal portion project radially outward and inward, respectively, from the mount portion to be brought into contact with a peripheral surface of the annular stepped portion and the ignition plug tube, respectively. The second seal portion can be elastically deformed following relative radial movements between the mount portion and the ignition plug tube.

Abstract: A seal member adapted to be mounted between a cylinder head cover and an ignition plug tube comprises a mount portion interposed radially movably between an upper surface of an annular stepped portion formed around an opening of the cylinder head cover for insertion of the ignition plug tube and a baffle plate. A first seal portion and a second seal portion project radially outward and inward, respectively, from the mount portion to be brought into contact with a peripheral surface of the annular stepped portion and the ignition plug tube, respectively. The second seal portion can be elastically deformed following relative radial movements between the mount portion and the ignition plug tube.