Department of automobile engineering

SIGMA INSTITUTE OF TECHNOLOGY & ENGINEERING (POLYTECHNIC)-648


DEPARTMENT OF AUTOMOBILE ENGINEERING
AUTOMOBILE ENGINE DIAGNOSIS & TESTING

3360201

LABORATORY MANUAL


EXPERIMENT: - 1 DATE:-
^{AIM: Cylinder Boring & Honing}

Objective: After completion of this experiment student will be able to know.

• 
  Boring process for cylinder block
  
• 
  Method of boring and its precautions
  
• 
  Surfacing of bore by surfacing tool
  
• 
  Honing process for cylinder
  
• 
  Method of patterning of hatch-back in bore
  

DESCRIPTION:

CYLINDER BORING:

Cylinders should be measured across the engine (perpendicular to the crankshaft of us), where the greatest wear occurs. Most wear will be found just below the ridge, and the least amount ar will occur below the lowest ring travel. The cylinder should be checked for out-of-round and taper. Most cylinders are serviceable if:

Maximum of 0.003 inch out-of-round

No more than 0.005 inch taper

^{Have no deep scratches in the cylinder wall}
The most effective way to correct excessive cylinder out-of-round, taper, or scoring is to rebore the cylinder. The rebored cylinder requires the use of a new oversize piston.

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