Page 324 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

Check the crank shaft journal bore diameter, Journal diameter and bearing oil clearance using plastic gauge, refer
with manufacturer’s service manual, if it is out of specification replace the bearing.
3 Checking of Cylinder Block
Check the cylinder bore taper and ovality wear using cylinder bore guage, If it is out of specification, Reboring ,
honing or replacing liner is to be done.
Check the cylinder block mating surface warpage. If necessary machine the surface
4 Checking of Piston assembly
Visually check the piston for scoring ,pitting, Wear or any damage, If necessary replace with new standard piston
Measure the piston diameter using outside micrometer, Measure the piston pin diameter, Measure Piston
clearance, Piston ring groove side clearance and piston ring end clearance If necessary replace the component
5 Checking of connecting rod assembly
Measure the connecting rod small end bore diameter, Measure the connecting rod big end bore diameter if it is
out of specification replace the connecting rod
Check the connecting rod bend and twist using connecting rod alignment fixture if necessary, replace it
6 Checking of camshaft
Check the camshaft lobe height, Straightness of the shaft, cam shaft journal diameter, Cam lobe flatness if
necessary replace it
7 Checking of cylinder head assembly
Check the cylinder head mating surfaces for warpage. If necessary Machine the mating surfaces.

Check the rocker arm, Rocker arm shaft, rocker arm springs, Adjusting screws, Hydraulic tappet if necessary
replace the part
Check the valve face, valve seat, Valve length, valve guide, valve springs if necessary replace the component.

8 Checking of flywheel
Check the flywheel surface for any scoring, Pitting or wear and check the flywheel ring gear if necessary replace it
Assembling of CRDI engine
Reassemble all the engine parts in the reverse order of dismantling

Note: While reassembling valve timing has to set properly. After assembling of engine, set and
adjust the valve tappet clearance as per the specification provided by the Manufacturer.

307

CITS : Automotive - Mechanic Diesel - Exercise 17.4 CITS : Automotive - Mechanic Diesel - Exercise 17.4