Learning ObjectivesThe Small-Block Chevy EngineThe Small-Block Chevy Engine

AUTO-01 Ver 1.0 29 Jun 2012

Applicability: 1955 - 20152

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Lesson Overview2

• Major Engine Components

• Engine Troubleshooting and Fault Indications

• Lesson Review / Quiz

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Learning Objectives

• Describe the components in the Small-Block Chevy short block assembly.

• Describe the components in the Small-Block Chevy fuel system.

• Describe the components in the Small-Block Chevy ignition system.

• Describe the components in the Small-Block Chevy valve train and timing system.

• Interpret the meaning of selected engine fault indications and describe the appropriate actions to resolve engine system malfunctions.

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Major Engine Sections

• General Engine Characteristics Review

• Short Block Assembly

• Fuel System

• Ignition System

• Valve Train and Timing System

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General Engine Characteristics Review

• The Small-block Chevy is a series of small bore/stroke engines built by the Chevrolet Motor Division:

• First Appeared in 1955 models (265 cu in.)

– Originally a 265 cu. In.

– Reached Maximum size at 400 cu in.

– Carbureted and Fuel Injected

• General Engine Characteristics:

– Variable compression ratios

– Horsepower ratings up to 1500HP

– Cast Iron and Aluminum Blocks

– Nicknamed “Mighty Mouse”

– Highly Successful in Oval track Racing

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• Short Block Components:

• Crankshaft

• Connecting Rod

• Piston

• Engine Block

• Oil Pan

Short Block Assembly

CRANKSHAFT

CONNECTING ROD

PISTON

OIL PAN

ENGINE BLOCK

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• Major Fuel Components:

• Carburetor

• Fuel Pump

• Intake Manifold

• Exhaust Manifold

Fuel System

INTAKE MANIFOLD

FUEL PUMP

CARBURETOR

EXHAUST MANIFOLD

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• Major Ignition Components:

• Distributor

• Spark Plugs/Wires

• Starter

• Generator

Ignition System

DISTRIBUTOR GENERATOR

STARTER

SPARK PLUGS/WIRES

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• Major Valve Train Components:

• Camshaft

• Intake Valves

• Exhaust Valves

• Timing Chain and Gear

Valve Train and Timing System

TIMING CHAIN AND GEAR

CAMSHAFT

IMTAKE VALVE

EXHAUST VALVE

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Engine Troubleshooting and Fault Indications

• Fuel System Malfunction Scenario

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Scenario11

During the race, you witness a flashing fuel warning message near the tachometer indicating a problem.

• Discuss the Characteristics and Indications of this Malfunction.

– How do you confirm the fuel system malfunction?

– What other systems are affected by the this malfunction?

– How many laps can you complete before you must pit?

• Describe the Your Actions for a Loss of Fuel Condition.

– Under Green Flag Conditions– Under Caution

• What are the Required Pit Crew Actions?

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Super Important Stuff

• Recent Developments

• Formal Notifications

• Driver Action Requests

• Technical Updates

Review any technical changes or operational updates to the engine:

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Lesson Review

• Major Engine Components

• Engine Troubleshooting and Fault Indications

• Lesson Review / Quiz

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Questions?

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Lesson Exam

Discuss Review Questions andAnswers with Your Instructor

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1. What is the major fuel component that distributes atomized fuel to each cylinder?

The intake manifold.

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2. What may occur if the fuel pump is subjected to extreme high temperatures?

Fuel that remains at a high temperature could cause a vapor-lock situation and possible combustion.

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3. What indication would be displayed if there was a fuel system malfunction?

A yellow flashing light near the tachometer would be visible to the driver and transmitted to the pit crew as well.

References

• Chevrolet Motor Division www.chevrolet.com

• Summit Racing www.summitracing.com

• JEGS Performance www.jegs.com

• Speedway Motors www.speedwaymotors.com

• Wikipedia http://en.wikipedia.org/wiki/Chevrolet_small-block_engine

• My memory from a very long time ago.

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This Concludes Our Lesson