CRANKMECHANISM
Checkingthecrankshaftandcrankshaft
bearings
Checkingthecrankshaftbearingshell
expansion
Note
ThedifferencebetweendimensionAand
dimensionBistheexpansionofthe
crankshaftbearings.
•Cleanthebearingshells(2)andputthemtogether
onaatsurfaceasmarked
•CheckdimensionAusingamicrometer(1)
•CheckdimensionBusingamicrometer(1)
Ifthemaximumpermittedexpansionof2.0mmis
exceeded,newbearingshellsmustbetted.
Checkingthecrankshaftbearingshellinside
diameter
•Insertthecrankshaftbearingshellsintothe
crankcaseandcrankcaselowersection(3)as
marked
•Putonthecrankcaselowersection(3)
•Screwintheoldmountingbolts(4)forthe
crankcaselowersection(3)andtightenthemto
65Nm
•Checkthecrankshaftbearingusingtheinternal
calliper(2)inconjunctionwiththeDialgauge[146]
(1)
•Repeatthemeasurementatallthecrankshaft
bearings
•Removethecrankcaselowersection(3)
Ifthecrankshaftbearingdimensionsareoutof
tolerance,seeGlycomainbearingdimensions,334,
tnewmainbearingshells.
AE63stedition345
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