Elements of the crank mechanism (KShM)
1 - crankshaft;
2 - connecting rod;
3 - piston;
4 - piston rings;
5 - gear ring of the flywheel;
6 - flywheel;
7 - bolts;
8 - rear crankshaft oil seal.
Attention: Before removing the crankshaft, the following must be removed: flywheel, oil sump, oil pump, pistons with connecting rods, rear cover of the engine block.
Before removing the crankshaft, check the end play of the shaft. Install the gauge with the indicator coaxially with the shaft and rest the indicator rod against the end or the crank,
Press the shaft all the way back and set the indicator scale to zero. Then push the shaft all the way forward, record the arrow reading, which is equal to the backlash. If the backlash is more than acceptable, check the wear of the shaft thrust bearings. If wear is found, the clearance can be reduced by installing new thrust bearings.
main bearings (liners) crankshaft 1.6 and 1.8 liter engines
Backlash can also be measured using feeler plates. Press the shaft all the way forward. Insert feeler gauges between the shaft and the front surface of the main bearing (see fig. on right).
main bearings (liners) crankshaft 2.0 liter engines
A - root bearings
B - persistent half rings
Check the markings on the main bearings. They must be numbered and have an arrow pointing in front of the engine. If there is no arrow, paint the arrow with paint before removing the covers. Loosen the cap nuts in 1/4 turn increments until they can be removed by hand.
Main bearing cap marking
F - front cover;
R - back cover.
Tap the covers gently with a soft-faced hammer, then remove them from the cylinder block. If necessary, use the bolts as levers to remove the covers. Try not to drop the bearing shells.
Carefully pull the crankshaft out of the engine. Put the bearing shells in place, install the bearing caps and tighten the bolts by hand.
Crankshaft 1.6 and 1.8 liter engines
Crankshaft 2.0 liter engines