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Home >> BMW >> 2017 >> M2 Automatic DCT Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine - Tightening Torques (F87) >> 11 28 V Belt With Belt TENSIONER And Idler Pulley

11 28 V Belt With Belt TENSIONER And Idler Pulley

N55 ENGINE (2016-2018): 

11 28 V-RIBBED BELT WITH TENSION AND DEFLECTION ELEMENT - TIGHTENING TORQUE SPECIFICATION

  Type Thread Tightening specification Measure
Standard belt drive        
1AZ Belt tensioner with deflection pulley to engine block. N55 M10x90   38 Nm
AZ Belt tensioner with deflection pulley to engine block. N55 M10 x 103   38 Nm
2AZ Deflection pulley 65 x 32 N55 M10x55   60 Nm
3AZ Deflection pulley 75 x 32 N55 M10x55   60 Nm
4AZ Holder for deflecting element to oil sump N55 M10x37   38 Nm
5AZ Holder for deflecting element to oil sump N55 M10x30   38 Nm
6AZ Deflecting element 75 N55 M10x55   56 Nm
7AZ Deflecting element 90 N55 M10x55   56 Nm
SGR belt (start alternator belt)        
8AZ Belt tensioner to crankcase (operating tensioner) N55 M10x90   38 Nm
9AZ Belt tensioner to crankcase (start tensioner) N55 M10x55   38 Nm
10AZ Deflecting element 75 N55 M10x55   56 Nm
11AZ Holder for deflecting element to oil sump N55 M10x37 ASA screw (exterior star handle) 38 Nm
12AZ Holder for deflecting element to oil sump N55 M10x30 ISA countersunk screw (interior star handle) 38 Nm

S55 ENGINE (2019-2022): 

11 28 V-RIBBED BELT WITH TENSION AND DEFLECTION ELEMENT - TIGHTENING TORQUE SPECIFICATION

  Type Thread Tightening specifications Dimension
Standard belt drive        
1AZ Belt tensioner with deflection pulley to engine block. S55 M10x90   38 Nm
2AZ Deflecting element 65x32 S55 M10x55   60 Nm
3AZ Deflecting element 75x32 S55 M10x55   60 Nm
4AZ Holder for deflecting element to lower section of crankcase (bedplate) S55 M10x30   38 Nm
5AZ Deflecting element to air conditioning compressor holder S55 M10x55   60 Nm
6AZ Belt wheel to coolant pump S55 M6x12   8 Nm