Whether you're prepping your vehicle for a car show, listing it for sale, or simply taking pride in your ride, a clean engine bay can make all the difference.
Note: This guide is written with all vehicle owners in mind, no matter what you drive.
Why Clean The Engine Bay?
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Makes it easier to spot small leaks and issues early
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Helps components stay cooler and function more efficiently
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Reduces wear on belts, pulleys, and wiring
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Improves resale value and shows pride of ownership
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And let’s face it, it just looks better
Step-by-Step Engine Compartment Cleaning Guide
1. Make Sure the Engine Is Cool
Never clean a warm engine. Let your vehicle sit overnight before cleaning. Spraying cold water on warm components can cause condensation inside electronics, leading to damage.
2. Protect the Air Intake
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Remove the air intake duct
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Tape off the throttle body opening with duct tape
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Remove or cover the air filter housing if needed
3. Choose a Good Cleaner
We recommend Greased Lightning, which lifts dirt without aggressive scrubbing. There are other safe underhood cleaners as well, just avoid citric acid-based products on coated parts (they can cause discoloration).
4. Apply Cleaner and Let It Soak
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Work in the shade when possible, or clean in sections
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Remove plastic engine covers to reach hidden areas
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Spray cleaner on the engine, inner fenders, and radiator area
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Let the cleaner soak for 10 minutes, keeping it wet the entire time
5. Rinse Gently, Not Forcefully
Use a standard garden hose. Avoid:
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Pressure washers (which can force water into sensitive areas)
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Steam cleaners (which can cause damaging condensation)
6. Dry It Out Thoroughly
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Use compressed air to blow off water
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Focus on areas under covers and around the alternator
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No air compressor? A leaf blower works too!
7. Final Touches That Go a Long Way
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Wipe down plug wires with silicone spray applied to a cloth- this repels moisture and restores shine
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Apply high-temperature grease to the hood latch
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Spray hood hinges with a lubricant like Superlube or LPS #1
💡 Bonus Tip:
If your vehicle allows it, remove the radiator cover for better access to the radiator and A/C condenser. You might be surprised how much debris collects up top and how much it affects cooling.
A clean engine compartment shows you care and it’s simple maintenance anyone can do.
Have questions about your setup or which products to use? We’re happy to help!