Volvo B 21 - Engine Cleaning and Checking Procedures; Engine Component Cleaning; Crankshaft Examination and Measurement

r
Group 27 Reconditioning engine
e/eaning and checking
c. Cleaning, checking
O ut -o f- round 119 452
Ct
Cl ean:
cylinde r bores (polish du ll parts)
cylinder block (eontact faces. bearing seats, oilways.
holes for cy l inder hoad balts, remove old gasket
material)
crankshah, blow compressed air through Qilways
main bear ing caps and sheiis.
C2
Examina c rankshah
Massure out-of-round and taperwith micrometer, Take
rneasurements at
different points on journals.
Connect ing rOO jo urnals
Maxout-of-raund . . ..... .
M
axtaper .. . . ...... .
Maln bea ri ng journals
Maxout-of-raund
Maxtaper ........ .
0.05 mm (0.0020 in)
0.05 mm (0.0020 in)
0. 07 mm (0. 0028 inJ
0.05 mm (0.0020 in)
Journals can be ground down to two undersizes. see
specifications on page 7.
If crankshaft is thought to be out-of-trua, check with a
dia
I indicator as follows.
Support crankshaft on 'V' blocks. Rotate one turn and
measure
out·of·true for two centre journals.
Out-of-true - max 0.05 mm (0.0020 in)
23