While driving the Lincoln Navigator, you may notice a burnt oil smell, accompanied by light smoking from the sides of the engine. Also, the oil may consume more oil than normal between oil changes. The head gaskets are prone to oil leaks on this vehicle, but this is not what would be expected. Instead of the symptoms of a blown head gasket, such as white smoke in the exhaust, engine stalling or surging, coolant and oil mixing, and the check engine light, the main concern here is simply an external oil leak and light smoking under the hood. Please note, however, this oil leak can easily turn into a blown head gasket, so it should not be ignored.