What are the methods for cleaning the oil cap

Time：2026-06-22

Author： Chongqing Xinhaoyu Auto Parts Co., Ltd.

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Use gasoline, anhydrous alcohol, or acetone to wipe the threads and surface. These solvents can efficiently dissolve engine oil and sludge, making them suitable for stubborn stains.

Solvent dissolution method: Use gasoline, anhydrous alcohol, or acetone to wipe the threads and surface. These solvents can efficiently dissolve engine oil and sludge, making them suitable for stubborn stains. The operation should be carried out in a well ventilated area and away from open flames.

Physical friction method: Add a small amount of detergent hot water into the lid, put in crushed eggshells, rice or fine sand, tighten and shake vigorously. Use particle friction to remove oil stains from gaps, and finally rinse with clean water.

Soaking softening method: Soak the oil cap in hot water for 10-15 minutes (the temperature of the plastic cap should not be too high to prevent deformation) to soften the sludge, and then use an old toothbrush to brush the threads and sealing groove.

Special cleaning agent: Spray car specific engine external cleaning agent or carburetor cleaning agent, let it stand for a moment, and then scrub it. It has strong oil removal ability and is relatively safe.

Check the sealing gasket: When cleaning, be sure to check whether the rubber sealing ring is aging or cracked. If the seal is poor, oil will still leak and form new sludge after cleaning. If necessary, a new gasket needs to be replaced.

Thoroughly dry: After cleaning, use compressed air to blow dry or air dry naturally to ensure that the threads and sealing surfaces are free of water and residue before installation, to prevent water vapor from entering the engine.

Safety protection: Smoking and open flames are strictly prohibited when using flammable solvents such as gasoline; Avoid contact between highly corrosive chemicals and plastic parts that may cause embrittlement.

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What are the methods for cleaning the oil cap

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