An improved oil seal cap for use in a shock absorber for a vehicle including an end wall, and aperture extending through the end wall, and a sidewall extending away from the sidewall in a first direction. The end wall includes a first portion and a second portion, wherein the second portion is raised in a second direction opposite the first direction with respect to the first portion, with the second portion forming a ridge. The oil seal cap is inserted into a reserve tube and cooperates with an oil seal to seal off the top of a shock absorber. The ridge of the end wall is at or above the oil seal and protects the oil seal from impacts of a jounce bumper provided on the shock absorber.