Inspection Of Cylinder Block - Volkswagen Taro 1989 Workshop Manual

INSPECTION OF CYLINDER BLOCK
1. Remove gasket material
Using a gasket scraper, remove all the gasket material from the
cylmder block surface
2.
Clean cylinder block
Using a soft brush and solvent, clean the block
3.
Inspect top of cylinder block for flatness
Using a precision straight edge and fee4er gauge, check the
sultace contacting the cylinder head gasket for warp
Maximum warp. 0 05 mm
If warp
IS
greater than maxlmum, replace the cyllnder block
4. Inspect cyllndem for vertical scratches
Vlsually check the cylinders for venical scratches
If deep scratches are present, rebore all four cyitnders
(See page 6 4
5. Inspect cylinder bores
Using a cylinder gauge, measure the cylinder bore d~ameter at
posalons A, B and
C
~n the thrust and axlal dtrectrons
(1) Thrust
Direction
(2) Axal Dwect~on
(3)
Front
NOTE. There are three slzes of standard cylinder bore diameter,
marked
"l
'.
"2' and
"3"
accordingly The mark
(4)
is stamped on
the cylmder block as shown
tn
the illustrat~on
Standard cylinder bore diameter
2Y Standard size
Mark ' l " &WO-85010 mm
Mark
" 2
86 01
l
-
86
020 mm
Mark'J" 86 021
-
86 030 mm