Disassembly Of Piston And Connecting Rod Assemblies - Volkswagen Taro 1989 Workshop Manual

4Y Standard size
Mark
"1" 91 000
-
91.010 mm
Mark"?' 91 011 -91 020 mm
Mark'J' 91 021 -91.030 mm
Maximum cylinder bore diameter:
2Y. Standard size 86.23 mm
Oversize 0.50 86.73 mm
Oversize 0.75 86.98 mm
Oventze 1.00 87 23 mm
4Y: Standard size 91 23 mm
Oversize 0.50 91.73 mm
if the diameter is greater than maximum, rebore ail four
cylinders, if necessary, replace the cylinder block.
6.
Remove scoring from cylinder bore
if the wear is less than
0
2 mm the cvlinders do not have to be
reground However any SnoL Oer prna~ced
m
the cyllnoer wai
abore lne upper plslon rmq m s t he remavw wnh
a
reamer
DISASSEMBLY OF PISTON AND CONNECTING ROD ASSEM-
BLIES
1.
Check fit between piston and pin
Try to move the piston back and fonh on the pislon pin
if any movement
IS
felt, replace the pislon and pin
2.
Remove piston rings
(a) Using a piston ring expander, remove the
compression
ring