Cleaning engine parts
Debris often missed• Under side of intake
Leading cause of bearing failure• Particle contamination
• Oil pump pick-up screen
Cleaning engine parts
Solvent tanks• Small degreasing jobs• Safe for all metals in engines
Cleaning engine parts
Cold tanks• Safe for all metals in engines• Slow soaking process
Cleaning engine partsHot tanks - Used for ferrous, nonferrous, or both
• Ferrous - caustics for iron and steel only (pH 12.5)
• Working assemblies may bind in hot tanks
• No cleaning solution dissolves carbon• Rinse with water and spray with rust inhibitor• Corrosion may take place after cleaning
• Both - detergents for all materials
Cleaning engine parts
Ovens for degreasing• Environmentally safe process• Primary chamber for cleaning• Exhaust afterburner to control emissions
Process • Primary chamber heats to 375F to start vaporization• Exhaust afterburner (1300°F) oxidizes vapors in stack• Primary chamber continues to heat to 700°F for iron• After cleaning, the sludge is left as ash• Aluminum should be limited to 500°F• Slow cooling prevents distortion
Cleaning engine parts
Shot blasting• For iron and steel only
• Tumble cylinder heads to remove shot or beads
• Shot .030” or larger• Minimal labor• Parts must be degreased and dry
Cleaning engine parts
Bead blasting• Parts must be degreased and dry
• Tumble cylinder heads to remove shot or beads• Glass beads used to remove carbon• Avoid threads, oil passages, and cooling passages
Cleaning engine parts
Bead blasting with baking soda• Water soluble• No shot retention
Cleaning engine parts
Tumbling small parts
• Small valve train parts agitated in tumbler
• Parts are tumbled with small media
• Agitation in solvent to wash away debris
• Protect valve stems
Cleaning engine parts
Ultrasonic cleaning• High frequency sonic generators
• Cleaning agents and heat add efficiency
Cleaning engine parts
Other cleaning tools• Ring groove scraper – ring grooves
• Wire wheel – piston tops
• Bore brushes – oil galleys
• Flare brush in a drill – combustion chambers
• Cold acid descalers – removing rust
