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Cleaning Tips

How to Clean an Engine

With a clean engine you'll enjoy more efficient cooling, less wear on cables and pulleys and a better overall life for your vehicle. Before cleaning a greasy engine bay, be sure to check your county and state laws for public car wash regulations, as well as your car owner's manual for cleaning & degreasing recommendations.

What You Need:

  • Simple Green All-Purpose Cleaner
  • Scrub brush (non-metallic)
  • Pressure washer with snow foamer (optional)
  • Garden hose or other water source
  • Plastic bags + tape
  • Clean towel or air compressor


Make sure your engine is cool before cleaning. Open the hood, and remove any leaves or other debris from under the windshield wipers and any accumulation around your engine. Check beneath your car for any potential oil leaks as well.

Cover and mask off all sensitive electrical components such as your car battery, alternator, distributor & air intake system to avoid exposure to excess moisture from water or your engine cleaner. Use tape if necessary to secure the plastic bag.

Manual Cleaning:

  1. Spray Simple Green on your entire engine bay, thoroughly coating the area. Allow the engine cleaner to penetrate the area for 3-5 minutes.
  2. Use a non-metallic bristled brush to agitate the grease & grime buildup.
  3. Spray down with a hose, brushing away any additional grime & dirt from your engine bay.
  4. When washing is complete, carefully remove the plastic bags by folding them inwards to avoid spilling on your electrical components.
  5. Dry engine thoroughly with a towel or compressed air.

Pressure Washer Directions:

Ensure that you are using a high pressured pressure washer with appropriate PSI and nozzle tips for engine cleaning. To avoid potential damage, we recommend starting 3-5 feet from the surface and moving closer as needed.

  1. Remove loose dirt & debris from around engine compartment.
  2. Pour Simple Green into pressure washer detergent tank.
  3. Use low-pressure spray nozzle or foam cannon to apply solution to engine. Allow cleaner to penetrate soiled areas for 3-5 minutes.
  4. Rinse with a higher-pressure nozzle, keeping a safe distance to avoid forcing water into sensitive areas like your carburetor.
  5. Dry with clean towel or compressed air.
For this tip we used
All-Purpose Cleaner
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