tow AUDI A4 2000 B5 / 1.G AFC Engine Cylinder Block Crankshaft And Flywheel Component Assembly Manual

13-11

Toothed belt, removing and installing


Removing

CAUTION!

Mark the direction of belt travel before
removing, using a crayon or marker.
Reinstalling a used belt in the opposite
direction could damage the belt.

- Remove ribbed belt page 13
-9 .

- Unclip toothed belt guard on both sides.

- Crank engine by hand to Top Dead Center (TDC) position.
- Check camshaft position. Large holes in camshaft sprocket locking
plates must face toward each other. If not, turn crankshaft one more
revolution.
- Remove Crankshaft Position (CKP) sensor from left-hand side of
cylinder block.
The TDC hole in the crankshaft must be aligned with the hole for the
removed crankshaft position sensor (check by looking and feeling).

- Thread crankshaft holder 3242 into hole left by crankshaft position
sensor, and tighten slightly.
- Remove ribbed-belt tensioner.
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13-25

Pistons and piston rings, checking and
installing


Note:
Before removing the pistons, mark their
installation positions clearly on the piston crowns
(as shown in illustration 13-860) using a
waterproof felt-tipped pen.

Piston installed position

CAUTION!
Do NOT scratch or scribe the piston surface. This surface has a
coating on it that must not be disturbed. - Arrow marking must point toward oil pump (front).
- Mark position clearly on piston crown with waterproof felt pen.

- Install piston using piston ring compressor.
Pa
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13-26

Checking pistons

- Measure piston approx. 10 mm (0.39 in.) from bottom of skirt, at right
angle (90 ) to piston pin. Maximum deviation from nominal dimension: 0.04 mm (0.0016 in.)

Checking and installing piston rings
"TOP" inscription must point toward piston crown Inner chamfer on plain ring must point toward piston crown Outer chamfer of stepped ring must point toward piston crown
Pa
ge 26 of 32 C
ylinder block, crankshaft and fl
ywheel, com
ponent la
yout
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE01.13.4