tow AUDI A4 1998 B5 / 1.G AEB ATW Engines Pistons And Connecting Rods Workshop Manual

13-53


Pistons and connecting rods,
disassembling and assembling
1 -
Nut for connecting rod bolt
30 Nm (22 ft lb) + additional 1/4 turn (90 )Always replace connecting rod bolt -13-Grease thread and contact surfaceTo measure radial play, tighten to 30 Nm
(22 ft lb) but not any further
2 -
Pressure relief valve Tightening torque: 27 Nm (20 ft lb)Opening pressure: 2.5-3.2 bar (36.25-46.4
psi)
3 -
Oil spray nozzle For piston cooling
4 -
Connecting rod bearing cap Mark -B- to indicate which cylinder each
cap belongs to
Installed position:Marks -A- point toward belt pulley side
Pa
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11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
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8 -
Connecting rod
Replace only as a setMarkings -B- indicate which cylinder each
rod belongs to
Installed position:Marks -A- point toward belt pulley sideWith oil bore for piston pin lubrication
9 -
Circlip
10 -
Piston pin If stiff, warm pistons to approx. 60 C
(140 F) When removing and installing, use
VW222a pilot drift
11 -
Piston rings Offset by 120Use piston ring pliers to remove and installMarking "TOP" must point to piston headChecking piston ring end gap Fig. 1Checking piston ring side clearance Fig.
2

Pa
ge 4 of 9 Pistons and connectin
g rods, disassemblin
g and assemblin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.13.4

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12 -
Pistons
CheckingMark installation position and matching
cylinder Arrow on piston head points toward belt
pulley side Install using piston ring compressor
13 -
Connecting rod bolt Always replace
Pa
ge 5 of 9 Pistons and connectin
g rods, disassemblin
g and assemblin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.13.4