I see in the service procedure for the M103 that the torque for the pulley to water pump bolts is 10 Nm. I question whether this is correct as they are M8 bolts. The M104 has a similar arrangement and the torque for the water pump and power steering pump is 32 Nm.

10Nm would be correct for the M6 fan pulley bolts.

Anyone know if there has been a correction or update to the M103 pulley torque specs?