dimensions AUDI A4 2000 B5 / 1.G AWM Engine Pistons And Connecting Rods Workshop Manual

13-82


7 -
Piston
Checking Fig. 3
, Page 13
-84
Mark installation position and cylinder
number. Arrow on piston crown points to pulley endInstall using piston ring clamp.Piston and cylinder dimensions Page 13
-86

8 -
Piston rings
Offset gaps by 120Remove and install with piston ring pliers."TOP" must face piston crownCheck ring gap Fig. 1
, Page 13
-83
Check ring to groove clearance Fig. 2
,
Page 13
-83

Pa
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g rods, disassemblin
g and assemblin
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11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
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pair&id=AUDI.B5.GE06.13.4

13-83


Fig. 1 Checking piston ring gap
- Push ring squarely from above down to approx. 15 mm from bottom
end of cylinder. To do this, use a piston without rings. Piston ring
Dimensions in mm
New
Wear limit
1. compression ring 0.20 to 0.40 0.8
2. compression ring 0.20 to 0.40 0.8
Oil scraper ring 0.25 to 0.50 0.8

Fig. 2 Checking ring to groove clearance
- Clean groove before checking clearance.Piston ring
Dimensions in mm
New
Wear limit
1. compression ring 0.06 to 0.09 0.20
2. compression ring 0.05 to 0.08 0.20
Oil scraper ring 0.03 to 0.06 0.15
Pa
ge 5 of 8 Pistons and connectin
g rods, disassemblin
g and assemblin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE06.13.4

13-86

Piston and cylinder dimensions


Honing
dimension

Piston
diameter
Bore
diameter
Basic
dimension mm
80.950
1)
81.01
Oversize mm
81.450 1)
81.51

1) Dimension without graphite coating (thickness
0.02 mm). The graphite coating on the piston
skirts wears away.
Pa
ge 8 of 8 Pistons and connectin
g rods, disassemblin
g and assemblin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE06.13.4