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Engine Cleaning Methods and Safety Guidelines

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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  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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