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Detaching timing chains from camshafts, removing and installing chain tensioners > < Removing and installing timing chain cover (bottom)

A4 Mk2

Camshaft timing chains - exploded view of components
Camshaft timing chains - exploded view of components
  Note
t  The crankshaft and camshafts must only be turned with the chain drive mechanism fully installed. Otherwise the valves may strike the pistons, causing damage to valves and piston crowns.
t  Mark rotation direction of camshaft chain with paint before removing. If a used chain rotates in the opposite direction when it is refitted, this can cause breakage.
   
Camshaft timing chain (left-side)
1 - Camshaft adjuster for exhaust camshaft
q   Identification “Exhaust”
q   Removing and installing → Chapter „Detaching timing chains from camshafts, removing and installing chain tensioners“
2 - Bolt for camshaft
q   Renew
q   Pre-tightening torque: 40 Nm
q   Final tightening torque: 80 Nm + 90° (1/4 turn) further
3 - Bolt for camshaft
q   Renew
q   Pre-tightening torque: 40 Nm
q   Final tightening torque: 80 Nm + 90° (1/4 turn) further
4 - Camshaft adjuster for inlet camshaft
q   Identification “Intake”
q   Removing and installing → Chapter „Detaching timing chains from camshafts, removing and installing chain tensioners“
5 - Camshaft timing chain (left-side)
q   Removing and installing → Chapter
6 - 9 Nm
7 - Chain tensioner for camshaft timing chain (left-side)
q   Removing and installing → Chapter „Detaching timing chains from camshafts, removing and installing chain tensioners“
8 - Oil strainer
q   Inserted in chain tensioner
q   Watch position of locking lug on outer circumference
9 - Gasket
q   Renew
q   Clipped onto chain tensioner
10 - Bearing bracket for drive sprocket
11 - 8 Nm + 45° (1/8 turn) further
q   Renew
q   Lubricate with oil before installing
12 - Drive chain sprocket for camshaft timing chain (left-side)
13 - Thrust washer for drive sprocket
14 - 6 Nm + 60° (1/6 turn) further
q   Renew

   
Camshaft timing chain (right-side)
1 - Drive chain sprocket for camshaft timing chain (right-side)
2 - Bearing mounting for drive sprocket
3 - 30 Nm + 90° (1/4 turn) further
4 - Camshaft timing chain (right-side)
q   Removing and installing → Chapter
5 - Bolt for camshaft
q   Renew
q   Pre-tightening torque: 40 Nm
q   Final tightening torque: 80 Nm + 90° (1/4 turn) further
6 - Camshaft adjuster for inlet camshaft
q   Identification “Intake”
q   Removing and installing → Chapter „Detaching timing chains from camshafts, removing and installing chain tensioners“
7 - Chain tensioner for camshaft timing chain (right-side)
q   Removing and installing → Chapter „Detaching timing chains from camshafts, removing and installing chain tensioners“
8 - Oil strainer
q   Inserted in chain tensioner
q   Installation position: locating lug on outer circumference
9 - Gasket
q   Renew
q   Clipped onto chain tensioner
10 - 9 Nm
11 - Camshaft adjuster for exhaust camshaft
q   Identification “Exhaust”
q   Removing and installing → Chapter „Detaching timing chains from camshafts, removing and installing chain tensioners“
12 - Bolt for camshaft
q   Renew
q   Pre-tightening torque: 40 Nm
q   Final tightening torque: 80 Nm + 90° (1/4 turn) further
13 - Thrust washer for drive sprocket

   

Detaching timing chains from camshafts, removing and installing chain tensioners > < Removing and installing timing chain cover (bottom)