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Engine Cleaning Methods and Safety Guidelines

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Learn about the different cleaning methods for engine parts, including cleaning with bases, acids, solvents, and various tools. Ensure safe and effective cleaning with this comprehensive guide.

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Engine Cleaning Methods and Safety Guidelines

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Presentation Transcript

  1. Chapter 5 Cleaning the Engine

  2. Objectives • Safely and correctly use cleaning tools and equipment • Describe the best choice of cleaning method for a particular application

  3. Cleaning with Bases • Cut grease very well • Work best when heated • Most automotive soaps are alkaline

  4. Cleaning with Acids • To remove rust and scale • Will not cut grease • Remove grease and oil with alkaline solution before using acid to remove rust • They can cause damage to air conditioning and electrical components

  5. Cleaning with Acids

  6. Cleaning with Solvents • Three types of solvents: • Mineral spirits • Water-based • Chlorinated hydrocarbons • Disposal of solvents is regulated by hazardous waste laws

  7. Solvent Parts Cleaning Tanks • Use a petroleum-based solvent • Include a bristle tip parts brush for removal of grease • Some include agitators to keep solvent moving for reduced cleaning time

  8. Solvent Parts Cleaning Tanks

  9. Hot Soak Tanks • One of the oldest forms of cleaning • Items are soaked for one to eight hours • Parts are placed in basket or lifting table

  10. Hot Soak Tanks

  11. Spray Washers • Similar to a dishwasher • Heats water to 180ºF or hotter • Parts are placed on a rotating platform

  12. Spray Washers • Advantages • Speed, safety, and drying time • Disadvantages • Do not clean oil galleys as well as hot tank • Parts rust if not removed immediately

  13. Spray Washers

  14. Manual Cleaning Methods • Wire wheel • Handheld wire brush • Sandpaper • Scotch Brite • Surface conditioning discs • Handheld gasket scrapper

  15. Glass Bead Blaster • Effective for carbon removal • Removes flaws and stress spots • Compressed air forces glass beads through a nozzle • Use caution when bead blasting engine parts • Glass beads can get lodged into oil galleys

  16. Glass Bead Blaster

  17. Soda Blaster • Baking soda • Soda used once and is not reclaimed • Removal or residual baking soda from galleys is not as crucial as glass beads • Works well for carbon • Not as effective on rust

  18. Soda Blaster

  19. Airless Blaster • Shot Blaster • Environmentally friendly • Oil and grease must be removed first • Tumbler is used after to remove steel shot • Process distorts machined surfaces • Shot comes in different sizes

  20. Thermal Cleaning • High temperature oven turns oil and grease to ash • Convection • Open Flame • Ferrous metals are cooked at 700ºF • Aluminum is cooked at 450ºF

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