Melling oil pump repair kits are provided to supply the parts needed to rebuild a specific individual oil pump that is a part of a timing cover application. A new or existing timing cover unit, if serviceable, is assembled using the components provided in the Melling oil pump repair kit. Melling kits include the required springs, shafts, gears gaskets, all the parts needed for a quality result. Although Melling recommends the purchase and install of a complete oil pump, in addition to oil pump repair kits for timing cover pumping units; Melling also supplies oil pump repair kits for several standard engine applications when a re builder has the desire to reuse the serviceable original oil pump casting.