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Home >> BMW >> 2021 >> M3 Base, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System -- Repair M3 (G80) >> 13 31 Fuel Pressure Check, Fuel Supply Line >> 13 31 035 Removing and installing/replacing fuel supply line (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS) >> Removing fuel delivery line

Removing fuel delivery line

Preliminary work 

WARNING: Working on fuel system 
Risk of fire! Danger of explosion! 
  • When working on the fuel system, make sure the workstation has sufficient ventilation, e.g., by means of extraction
  • Tightly seal off open lines and connections; collect any leakage fuel directly at the point of exit
  • No fire, sparks, open flames or smoking
CAUTION: On releasing high pressure line, fuel may emerge at high speed 
Injury hazard! 
  • Wear suitable personal protective equipment
  • Before performing any installation work, allow cooling system to cool down to less than 40°C
  • Note warnings on cylinder head cover
NOTE: RISK OF DAMAGE 
Damage to the ignition coil 
The silicone hose of the ignition coil must not be contaminated by fuel as this can lead to failure of the ignition coil 
  • When working on the fuel system, cover the ignition coils with suitable materials and remove where required
  • Do not oil or grease the silicone tube of the spark plug socket. Do not  use any protection or maintenance products (e.g. silicone spray, rubber care products, rust remover, etc.)
NOTE: RISK OF DAMAGE 
Contaminant or foreign body 
Contamination can result in malfunctions, loss of function or leaks 
  • Adhere to the utmost cleanliness
  • Protect components from contamination e.g. by covering
  • Close off line connections with seal plugs
NOTE: TECHNICAL INFORMATION 
Reset special tool in early to avoid bending pressure lines
G14902513Courtesy of BMW OF NORTH AMERICA, INC.