1. INTAKE and EXHAUST SYSTEMS Chapter7 Classroom Manual Page 199 CBC AUTOMOTIVE

2. OBJECTIVES Explain the function of the intake manifold. Explain the function of the exhaust manifold. Describe different type of air cleaners Explain purpose of heated air inlet system Explain purpose of electrically heat grid Describe operation of heat riser valve Explain Catalytic Converter Operation CBC AUTOMOTIVE

3. INTRODUCTION Proper combustion requires the engine to “breathe” properly. Intake & Exhaust manifolds & Valve train must all work together. Determine normal & Abnormal operation of Intake and Exhaust systems Auxiliary air preheat systems must function properly. CBC AUTOMOTIVE

4. MANIFOLDS Intake Materials –Cast Iron –Aluminum –Plastic Manifold Types –Single Plane –Dual Plane Runner Design Exhaust Materials –Cast Iron –Steel Tubing –Stainless Steel Tubing Manifold Types –Factory cast –Tube Headers Runner Design CBC AUTO

5. INTAKE MANIFOLD Prevents condensation and assists in vaporization of air fuel mixture Runners are Level Equal runner length and cross section. Wet or Dry Inlet temp 100 Exhaust crossover passage CBC AUTOMOTIVE

6. DUAL PLANE CBC AUTOMOTIVE

7. BI-METAL SENSOR CBC AUTOMOTIVE

8. EXHAUST MANIFOLD Made of cast iron, nodular iron, stainless steel or heavy gauge steel. Engineered for size, flow, silencing. A restriction of exhaust gas flow can result in excessive backpressure. Proper tuning of the exhaust manifold (headers) creates a vacuum that assists in air/fuel mixture induction into the cylinder. CBC AUTOMOTIVE Page 292L

9. EXHAUST MANIFOLD SERVICE New Manifolds installed with no gasket Don’t remove when hot Torque correctly Use special heat resistance fasteners Fig 7-27L

10. ELECTRIC CATALYTIC CONVERTER In development Found this on the internet

11. EXHAUST PIPE Made from Stainless steel, zinc-plated Double wall construction prevents “ringing” Sealing by: –Steel composition Gasket/Washer –Ball Shaped flange against exhaust manifold flange Fit of Pipe to Muffler or Converter should be at least 1 1/2 inches.

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