Inspection And Repair Of Crankshaft - Volkswagen Taro 1989 Workshop Manual

H
=
allowance for honing
0 02 mm or less
3. Bore and hone cylinders t o calculated dimensions
Amount of honing:
0 02 mm maximum
CAUTION
Excessive honing will destroy the finished
roundness.
Main journal diameter:
Standard slze 57 985
-
58 000 mm
Undersize 0 25
57 745
-
57 755 mm
Crank pm diameter.
Standard sme
47 985
-
48 000 mm
Undersize 0 25
47 745
-
47 755 mm
If the diameter is not wnhin specificat~on, check the oil
clearance
INSPECTION AND REPAIR OF CRANKSHAFT
1. Inspect crankshafi for runout
(a) Place the crankshaft on V-blocks
(b) Using a dlal indicator, measure the circle runout at the
centre journal
Maxmum circle runout 0 06 mm
If the circle runout is greater than maximum, replace the
crankshaft
2.
Inspen main journals and crank pins
(b) Check each maln journai and crank pln for taper and out-of-
round as shown
Maximum taper and out-of-round:
0 02 mm
if taper and out-of-round is greater than maximum, replace the
crankshaft.
3. It necessary, grind and hone main journals andior crank pins
, L
G m d and hone the main journals andior crank pins to the
undersized
finished diameter.
(a) Using a
micrometer,
measure the diameter of each maln
journal and crank pin
Fit new main journal andior crank pin undersize bearings.