LR3/Disco 3
Crankshaft Main Bearing Journal Clearance
1 . NOTE :
NOTE :
NOTE :
Position on a length of Plastigage on the bearing journal.
2 . NOTE :
Carry out the measurement.
3 . NOTE :
Remove the lower crankcase with bearing shells.
4 . Read off the measurement.
Published : Dec 20, 2001
Verify that the following stages are followed exactly. The crankshaft must be to specification.
The bearing shells and journals must be free from engine oil and dirt.
The measuring point should be near to the center.
Insert the associated bearing shells, without lubrication, into the cylinder block.
Insert the crankshaft, without lubrication, into the cylinder block.
Position a strip of Plastigage, equal to the width of the bearing, on the bearing journal.
Measure all the bearings at the same time.
Install the lower crankcase with bearing shells following the relevant tightening sequence.
Do not hit the lower crankcase.
Compare the length of plastigage with the Plastigage scale.
The value that is read off is the bearing clearance.
If the measurement is out of the specified range, change the bearing shells and repeat the measurement.
