An engine protection cover in car insurance keeps you financially protected against any repair cost in case of a damaged engine and/or its parts. A comprehensive car insurance policy does not cover the damages incurred on car's engine or its parts like crankshaft, piston, pins, cylinder, gearbox, etc. Having an engine protection cover provides a financial protective shield against the damages that may incur to the car's engine because of leakage of lubricating oil, water ingression, hydrostatic lock, etc.