How to Paint Top of Car Engine and Valve

Materials

Prepare the engine. Clean the engine with a degreaser and let it dry completely. Sand the surface of the engine with fine-grit sandpaper to create a smooth surface for the primer to adhere to. Remove any loose paint or debris from the engine.
Apply primer. Apply a coat of primer to the engine. Allow the primer to dry completely according to the manufacturer’s instructions.
Mask off the areas you don’t want to paint. Use masking tape to cover any areas of the engine that you don’t want to paint, such as the spark plugs, wires, and hoses. Cover any other parts of the engine that you don’t want to get paint on, such as the intake manifold and exhaust manifold.
Paint the engine. Apply a thin coat of paint to the engine. Allow the paint to dry for a few minutes before applying a second coat. Apply as many coats of paint as necessary to achieve the desired coverage. Allow the paint to dry completely according to the manufacturer’s instructions.
Remove the masking tape. Once the paint is dry, remove the masking tape. Be careful not to damage the paint when removing the tape.
Allow the engine to cure. Allow the engine paint to cure for several days before driving the car. This will allow the paint to fully harden and become more resistant to wear and tear.

Use a high-temperature engine paint. This type of paint is designed to withstand the high heat of an engine.
Apply thin coats of paint. This will help to prevent the paint from running or dripping.
Allow the paint to dry completely between coats. This will help to ensure that the paint adheres properly to the engine.
Be careful not to get paint on any electrical components. This could cause damage to the electrical system.
If you are painting the valve cover, be sure to remove the spark plugs and wires before painting. This will prevent damage to the spark plugs and wires.

Wear gloves and safety glasses when painting the engine. This will help to protect you from the paint fumes.
Do not paint the engine while it is running. This could cause the paint to catch fire.
Allow the engine to cool completely before painting. This will help to prevent the paint from blistering or peeling.