Department of automobile engineering


Figure 10 INSPECTING CRANKSHAFT JORNALS



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Figure 10 INSPECTING CRANKSHAFT JORNALS
CHECKING THE CRANKSHAFT END PLAY:

End play should be 0.14 – 0.17 mm ( 0.0055 to 0.0067 in), wear limit 0,22 mm ( 0.0087 in). End play should be adjusted before installing the crankshaft. The use of more than one soft iron gaskets is not permissible.





1. Properly position Bearing 1 on Journal 1

2. Install spacer of calculated thickness. The spacers are available in thicknesses from 0,8 to 1.05 mm (0.0315 to 00413 in) and are marked alphabetically from A through F.





3. Attach flywheel to crankshaft and torque gland nut to 45- 50 mkp

4. Measure end play with feeler gauge.





End play is measured at the crankshaft pulley when the engine is installed in vehicle and at the flywheel when the engine is removed. In both cases use a dial gauge mounted in P 17 holder. When measuring end play at the crankshaft pulley, attach gauge holder to a stud in the timing gear cover; when measuring at the flywheel, attach the holder to the engine mounting flange by means of a bolt

CHECKING OF CRANKSHAFT:

Measure each rod journal for taper (at each end of the journal surface). Maximum allowable rod journal taper is generally around 0.0002-inch. Also measure rod journal width (base of fillet to base of fillet — in other words, the front of the journal and the rear of the journal relative to crank length), and compare this to the listed spec. If journal width is too tight, you’ll have insufficient connecting rod side play Measure each rod journal for taper (at each end of the journal surface). Maximum allowable rod journal taper is generally around 0.0002-inch. Also measure rod journal width (base of fillet to base of fillet — in other words, the front of the journal and the rear of the journal relative to crank length), and compare this to the listed spec. If journal width is too tight, you’ll have insufficient connecting rod side play.






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