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Automobile Engineering Lab Lab Experiments

Dismantling of Six Cylinder Diesel Engine


To dismantle the given six cylinder diesel engine.

Tools and equipment:

Given six cylinder diesel engine, socket tool kit, spanners, screw drivers, hammer, pliers, chisels, diesel, kerosene, cotton waste etc.



  • Drain off all the oil from the engine.
  • Remove the tappet cover with its gasket.
  • Remove the rocker shaft assembly and then push rod.
  • Remove the nuts of inlet and exhaust manifold and remove them.
  • Remove the cylinder head nuts and remove cylinder head with its gaskets.
  • Tilt the engine to one side, remove the oil sump with its gaskets.
  • Remove timing cover and chain.
  • Remove oil pump with strainer after removing pump foundation bolts.
  • Flywheel is then removed.
  • Remove connecting rod big end bolts, remove the cap, push the connecting rod so that piston comes out from the other side.
  • After the pistons are removed the crank shaft is taken out from the cylinder block.
  • Remove the water pump.
  • Remove timing gear from the cam shaft.
  • Remove the cam shaft.
four-stroke diesel cycle, compression ignition engine
piston ring
connecting rod
crank shoft


The procedure for dismantling operation is adopted in the reverse to assemble operation.

  1. At first cam shaft is placed properly.
  2. Timing gear is attached to the camshaft correctly.
  3. Water pump is then attached.
  4. Crank shaft is kept inside the cylinder block.
  5. Pistons connecting rod assembly is then inserted into the cylinder bore properly and then attached to the crank shaft.
  6. Flywheel is then attached to the crank shaft.
  7. Oil pump with strainer is then placed, followed by timing cover and chain.
  8. Oil sump with its gaskets is then attached.


Thus the given six cylinder diesel engine is dismantled.

Viva Questions:

  1. Name of the various fuel supply system?
  2. Which one is most accurate fuel supply system for petrol cars?
  3. Where the fuel pump is usually located in the car?
  4. Why the carburetor float is made hollow?
  5. What is the function of check valve is the carburetor?
  6. What is the function of venturi in the carburetor? 7 Name any Indian vehicle using solex carburetor?
  7. What is the purpose of petrol injection?
  8. What is the common rail fuel injection system?
  9. What are the various types of petrol injection system?
  10. What is the function of a fuel feed pump?
  11. What is the function of fuel injector?