Fuel Pump Seal kit is designed to keep hot engine oil in the engine and out of the fuel pump. Fuel Pump Seal kit is designed to keep hot engine oil in the engine and out of the fuel pump.?ÿ?ÿ Our new seal kit uses a molded neoprene seal bonded to an alloy plate to seal around the pump arm and keep the hot oil out of the pump cavity.?ÿ Special insulating gasket and sleeved, insulated bolts also cut down on the engine heat transferred to the pump to further reduce fuel temperature.