Foaming engine degreaser is specifically designed to remove heavy dirt and road grime from all types of engines. The foaming action lifts and carries away larger pieces of dirt. This foaming degreaser expands underneath and between engine components to remove unwanted road grime from your engine.Engine must be off and cool before application. Do not start your engine after the product is applied. Care must be taken with all under the hood wiring and electronic sensors or components. Cover intake system openings and electrical components. Uncovered, cracked, frayed wires, or engine computer units can short circuit. Shake well and apply generously to dry engine. Make sure to cover all dirty and grimy surface areas with spray. Rinse overspray from body surfaces to avoid possible de-waxing or streaking. Engine cleaners may cause spotting to chrome or damage to custom paint or graphics. Allow to soak for a minimum of 15-minutes. Brush unusually heavy deposits to break up dirt. Rinse all areas with water from top down. Minimize rinse water in areas that can cause performance problems. RINSING is necessary to properly clean the engine and prevent potential fire hazard. When finished, start the engine and idle for 5-minutes to ensure complete dryness.