Volvo Penta TD520GE Workshop Manual page 100

Repairing components
110
3. Tighten the locknut to ........ 20 ±2 Nm (15 lbf ft).
Recheck the setting with the feeler gauge.
4. Rotate the crankshaft another revolution (360°).
Set the valve clearance for each cylinder using a
feeler gauge, according to the black markings.
Mark up the rocker arm on each set cylinder,
using a chalk.
5. Tighten the locknut to ........ 20 ±2 Nm (15 lbf ft).
Recheck the setting with the feeler gauge.
6. Fit a new rocker cover gasket.
Group 21