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Home >> BMW >> 2017 >> 530i >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> Engine - Camshaft/Rocker Arm - Repair (G30) >> 11 31 Camshaft >> 11 31 094 Removing and installing/replacing the left hydraulic chain tensioner (M550i xDrive, 2020-2022) >> Slackening the hydraulic chain tensioner of cylinder bank 2

Slackening the hydraulic chain tensioner of cylinder bank 2

G14253551Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: RISK OF DAMAGE 
Damage to timing chain or timing chain drive. 
Turning the engine without chain tensioner or special tool can result in damage to the timing chain and timing chain drive. 
  • Always turn the engine with the chain tensioner or the special tool.
  • Position the special tool 0 491 012 (11 4 120)  (3) in the bore and fasten the chain tensioner piston.