Boring Of Cylinders; Inspect Connecting Rods - Volkswagen Taro 1989 Workshop Manual

5. Inspact connecting rods
(a) Using a rod aiigner, check the connecting rod alignment
Check for bend.
Maximum bend:
0 05 mm per l00 mm
If bend is greater than maximum value, replace the connecting
rod assembly
.
Check for twist
Maximum twist
0 15 mm per 100 mm
If twist is greater than maximum value, replace the connecting
rod assembly
NOTE When replacing the connecting rods, replace the same
number of connecting rod bearings and new connecting
rod cam
BORING
OF
CYLINDERS
NOTE.
Bore all four cyllnders for the oversized piston's outside
drameter
.
Replace the piston rings with ones 10 match the oversized
plslans
l.
Keep oversized pistons
Oversized piston diameter.
2Y Oversize 0 50 86 415
-
86 M 5 mm
Oversize 0 75
86 655
-
86 695 mm
Oversize
1 00
86 915
-
86 945 mm
4Y Oversize 0 50 91
438
-
91
468
mm
Calculate dlmenaion for boring cyllnders
(a) Using a mlcrometer. measure the plston diameter at right
angles to the piston pin center line.
24
mm from the piston
head
(b) Calculate the size each cylinder is to be rebored as follows
Size to be rebored
=
P
+
C
-
H
P
=
piston diameter
C
=
plston clearance