LEMON Manuals: Even more car manuals for everyone
Home >> BMW >> 2021 >> M4 Base, Standard Trans >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Camshafts -- Repair M4 (G82 & G83) >> 11 31 Camshaft >> 11 31 090 Removing and installing/replacing the chain tensioner piston (M4 2021-2023) >> Removing chain tensioner

Removing chain tensioner

WARNING: Working on 12 V electrical system  .
Risk of short circuits! Risk of fire! 
  • Make sure that there is no charger  connected to the jump start terminal in the engine compartment.
  • Detach battery ground lead from battery.
  • For auxiliary batteries: Detach battery minus cables from all auxiliary batteries.
WARNING: Hot surfaces  .
Risk of burning! 
  • Perform all work only on components that have cooled down.
NOTE: RISK OF DAMAGE 
Damage to battery terminal, the safety battery terminal or the intelligent battery sensor (IBS)  .
Damaged battery terminals can lead to malfunctions or vehicle electrical system faults  .
  • Detach battery terminal from battery pole by carefully shifting to and fro. Do not pry off using a tool.

Preliminary work 

Precondition 

Negative battery cable disconnected.

NOTE: TECHNICAL INFORMATION 
Collect and dispose of emerging fluids. Observe country-specific waste disposal regulations.
G15330291Courtesy of BMW OF NORTH AMERICA, INC.