How to Easily Wash an Engine Bay




Introduction: How to Easily Wash an Engine Bay

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Video tutorial on how to wash dirt, grease, or grim away from your engine bay. Make sure your engine is cool when doing this procedure. This is the same procedure used by vehicle dealership and many detailers. Many people do not realize but your engine is always exposed to moisture or water, especially in the rain or snow. This can be applied to both gasoline and diesel engines.

Tools/Supplies Needed:

  • soap (used in the video is Spray Nine)
  • plastic bags
  • water
  • pressure washer or hose
  • brush
  • air compressor
  • clean cloth

Step 1:

First ensure that your engine is cool, this procedure should not be done with the engine running or warm. Have your vehicle parked in a shaded area which will reduce the chance of the soap drying. Using a plastic bag, cover up any high risk components such as the alternator, fuse panel, coil pack, and distributor. Using a degreasing soap, spray down the engine, then allow the soap to soak for about five minutes, depending on how dirty the engine is.

Step 2:

Using a pressure washer or hose, set it to the widest fan spray. Be careful around the areas you have bagged off and any areas where your engine fluids are added. Continue to rinse the engine off, washing away any dirt and debris. Rinse thoroughly to remove any soap residue. Once finished, inspect for any dirt which may be remaining. If there is dirt remaining you can spray the engine again with the soap and use a brush if needed to agitate the built up dirt. Again rinse thoroughly.

Step 3:

Once satisfied, use compressed air to blow away any water residue which will help dry the engine. Remove the plastic bags, and clean any high risk areas by hand using a damp toothbrush and cloth.

Step 4:

Leave the hood open, park the vehicle in the sun and allow it to dry. Once dry, your vehicle is ready to use. As an additional step if you wish, oil spray can be applied to help protect the metals from rust or corrosion.

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    4 years ago

    If you want to go that extra step, you can even use a light coat of no-touch tire shine on the engine and engine bay. It will look like new after that. JMHO


    Reply 4 years ago

    Great tip, thank you for sharing. I used 303 areospace on my other engine bay cleaning tutorial. Gives a really mild shine, similar to what is found on new plastic and no residue is left on the surface. I haven't touched my engine bay since I've cleaned it and it appears to help repel dirt/dust too.