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SEALING the ENGINE

SEALING the ENGINE. Chapter 5 Classroom Manual Page95 Lab Manual Page 113. CBC AUTOMOTIVE RK. OBJECTIVES. Locate cracks in castings. Explain process of repairing cracks by welding. Properly install common engine gaskets including cyl. head & valve cover gaskets.

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SEALING the ENGINE

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  1. SEALING the ENGINE • Chapter 5 • Classroom Manual • Page95 • Lab Manual • Page 113 CBC AUTOMOTIVE RK

  2. OBJECTIVES • Locate cracks in castings. • Explain process of repairing cracks by welding. • Properly install common engine gaskets including cyl. head & valve cover gaskets. • Properly install typical lip seals. • Extract broken fasteners. • Perform thread repair. CBC AUTOMOTIVE RK Page 113

  3. INTRODUCTION • Cracked castings - Repair or Replace? • Other causes of leakage, • Worn or damaged seals • Gaskets • Threaded holes can be damaged from, • Improper torquing • Corrosion CBC AUTOMOTIVE RK Page 113

  4. CRACK DETECTION • Visual Inspection • Magnetic Particle Inspection (MPI) • Magnetic Fluorescent • Spray Penetrant Dye • Pressure Testing • On-car • Off-car CBC AUTOMOTIVE RK Page 114

  5. CRACK REPAIR • Pinning Cracks • Welding Cracks • Chemical Crack Repair • Ceramic block sealers • Epoxy CBC AUTOMOTIVE RK Page 115

  6. GASKET INSTALLATION • Follow instructions. • Thoroughly clean the mating surface. • Match to old gasket. • Check for proper fit. • Never reuse gaskets. CBC AUTOMOTIVE RK Page 118

  7. CYLINDER HEAD GASKET • Must be capable of withstanding tremendous heat and pressure. • Follow gasket makers instructions on whether or not to use sealant. • What type of sealant and how much? • Run thread chaser in bolt holes. CBC AUTOMOTIVE RK Page 119

  8. USING STRAIGHTEDGE CBC AUTOMOTIVE RK

  9. VALVE COVER GASKETS • Check cover flanges for straightness. • Use load spreaders when available. • Use sealants only when necessary and not to much. See P5-8 CBC AUTOMOTIVE RK Page 120

  10. SEAL INSTALLATION • Install with lip (and garter spring) toward liquid. • Lubricate lip before installation. • Use sealant on the outside of steel seals. • Use a seal installer. CBC AUTOMOTIVE RK Page 122

  11. USING SEALANTS • Use proper sealant for application. • Do not use sealants unless specified in service manual or by gasket manufacturer. • Types of sealants • Hard drying • Aerobic (RTV) • Anaerobic CBC AUTOMOTIVE RK Page 122

  12. FASTENERS • ID fasteners by • Nominal diameter • Pitch (Threads per Inch) • Length • Strength CBC AUTOMOTIVE RK

  13. THREAD REPAIR • See Handout CBC AUTOMOTIVE RK

  14. THREAD REPAIR • See Handout CBC AUTOMOTIVE RK

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