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Engine Service

AUT 112W

Engine Service

AUT 112W

Course Description

Prerequisite: Minimum C (2.0) grade in both AUT 100 and AUT 108. Studies automotive gasoline engines, terminology, operation, and diagnosis. Develops skills in controlled learning experiences on laboratory engine assemblies. (45-75)

Outcomes and Objectives

Diagnose General Engine; Removal and Reinstallation (R&R). Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.

Objectives:

  • Identify and interpret engine concern; determine necessary action. P-1
  • Research applicable vehicle and service information, such as internal engine operation, vehicle service history, service precautions, and technical service bulletins. P-1
  • Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, and calibration decals). P-1
  • Inspect engine assembly for fuel, oil, coolant, and other leaks; determine necessary action. P-1
  • Diagnose engine noises and vibrations; determine necessary action. P-2
  • Diagnose the cause of excessive oil consumption, unusual engine exhaust color, odor, and sound; determine necessary action. P-2
  • Perform engine vacuum tests; determine necessary action. P-1
  • Perform cylinder power balance tests; determine necessary action. P-1
  • Perform cylinder compression tests; determine necessary action. P-1
  • Perform cylinder leakage tests; determine necessary action. P-1
  • Remove and reinstall engine in a late model front-wheel drive vehicle (OBDI or newer); reconnect all attaching components and restore the vehicle to running condition. P-1
  • Remove and reinstall engine in a late model rear-wheel drive vehicle (OBDI or newer); reconnect all attaching components and restore the vehicle to running condition. P-3

Diagnose and repair cylinder head and valve train. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.

Objectives:

  • Remove cylinder head(s); visually inspect cylinder head(s) for cracks; check gasket surface areas for warpage and leakage; check passage condition. P-2
  • Install cylinder heads and gaskets; tighten according to manufacturer’s specifications and procedures. P-1
  • Inspect valve springs for squareness and free height comparison; determine necessary action. P-2
  • Replace valve stem seals on an assembled engine; inspect valve spring retainers, locks, and valve grooves; determine necessary action. P-2
  • Inspect valve guides for wear; check valve stem-to-guide clearance; determine necessary action. P-3
  • Inspect valves and valve seats; determine necessary action. P-3
  • Check valve face-to-seat contact and valve seat concentricity (runout); determine necessary action. P-3
  • Check valve spring assembled height and valve stem height; determine necessary action. P-3
  • Inspect pushrods, rocker arms, rocker arm pivots and shafts for wear, bending, cracks, looseness, and blocked oil passages (orifices); determine necessary action. P-2
  • Inspect hydraulic or mechanical lifters; determine necessary action. P-2
  • Adjust valves (mechanical or hydraulic lifters). P-1
  • Inspect camshaft drives (including gear wear and backlash, sprocket and chain wear); determine necessary action. P-2
  • Inspect and replace timing belts (chains), overhead camdrive sprockets, and tensioners; check belt/chain tension; adjust as necessary. P-1
  • Inspect camshaft for runout, journal wear and lobe wear. P-2
  • Inspect camshaft bearing surface for wear, damage, out-of-round, and alignment; determine necessary action. P-3
  • Establish camshaft(s) timing and cam sensor indexing according to manufacturer’s specifications and procedures. P-1

Diagnose and repair engine block assembly. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.

Objectives:

  • Disassemble engine block; clean and prepare components for inspection and reassembly. P-2
  • Inspect engine block for visible cracks, passage condition, core and gallery plug condition, and surface warpage; determine necessary action. P-2
  • Inspect internal and external threads; restore as needed (includes installing thread inserts). P-2
  • Inspect and measure cylinder walls for damage, wear, and ridges; determine necessary action. P-2
  • Deglaze and clean cylinder walls. P-2
  • Inspect and measure camshaft bearings for wear, damage, out-of-round, and alignment; determine necessary action. P-3
  • Inspect crankshaft for end play, straightness, journal damage, keyway damage, thrust flange and sealing surface condition, and visual surface cracks; check oil passage condition; measure journal wear; check crankshaft sensor reluctor ring (where applicable); determine necessary action. P-2
  • Inspect and measure main and connecting rod bearings for damage, clearance, and end play; determine necessary action (includes the proper selection of bearings). P-2
  • Identify piston and bearing wear patterns that indicate connecting rod alignment and main bearing bore problems; inspect rod alignment and bearing bore condition. P-3
  • Inspect and measure pistons; determine necessary action. P-2
  • Remove and replace piston pin. P-3
  • Inspect, measure, and install piston rings. P-1
  • Inspect auxiliary (balance, intermediate, idler, counterbalance or silencer) shaft(s); inspect shaft(s) and support bearings for damage and wear; determine necessary action; reinstall and time. P-2
  • Inspect or replace crankshaft vibration damper (harmonic balancer). P-3
  • Assemble the engine using gaskets, seals, and formed-in-place (tube-applied) sealants, thread sealers, etc. according to manufacturer’s specifications. P-2

Diagnose and repair lubrication and cooling systems. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.

Objectives:

  • Perform oil pressure tests; determine necessary action. P-1
  • Inspect oil pump gears or rotors, housing, pressure relief devices, and pump drive; perform necessary action. P-2
  • Perform cooling system, cap, and recovery system tests (pressure, combustion leakage, and temperature); determine necessary action. P-1
  • Inspect, replace, and adjust drive belts, tensioners, and pulleys; check pulley and belt alignment. P-1
  • Inspect and replace engine cooling and heater system hoses. P-1
  • Inspect, test, and replace thermostat and housing. P-2
  • Test coolant; drain and recover coolant; flush and refill cooling system with recommended coolant; bleed air as required. P-1
  • Inspect, test, remove, and replace water pump. P-1
  • Remove and replace radiator. P-2
  • Inspect, and test fans(s) (electrical or mechanical), fan clutch, fan shroud, and air dams. P-2
  • Inspect auxiliary oil coolers; determine necessary action. P-3
  • Inspect, test, and replace oil temperature and pressure switches and sensors. P-2
  • Perform oil and filter change. P-2

Write effectively.

Objectives:

  • Practice writing on essay unit tests.
  • Practice writing on quizes.
  • Practice writing on assignments.
  • Practice writing on weekly feedback to instructor.
  • Practice writing service repair orders (concern, cause, correction).