Alfa Romeo 159 Training Material page 62

ENGINE
Countershaft drive chain
1. Countershaft drive pulleys
2. Guide conduits
3. Crankshaft pulley
4. Tensioner unit
5. Tensioner
6. Countershaft drive chain
7. Coolant pump drive gear
Timing system
1. Output marking on camshaft actuator pulley drive chain
2. Input marking on camshaft actuator pulley drive chain
3. Fourth cylinder cam position
4. Marking on countershaft drive chain, input side (brass colour)
5. Marking on crankshaft pulley drive chain (silver colour)
6. Marking on countershaft drive chain (silver colour)
Timing is adjusted using the fourth cylinder TDC as reference. The TDC points on the chain are marked by coloured
links. These must correspond to the markings on the drive gear teeth.
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