Mercedes Benz Engine Timing Gears 2700506100 For DE20 M276 DE35 OM642 DE30

2700506100 Mercedes-Benz Engine Timing Gear  FOR M272/M273/M274 DE20 LA/M276 DE35/OM642 DE30 LA 

1. Product Purpose

Core Function:
As the central drive component of Mercedes' timing system, it precisely transmits crankshaft power to the camshaft to ensure:

• Perfect synchronization between valve timing and piston movement

• Optimal air-fuel ratio and combustion efficiency

• Coordination with fuel injection and ignition timing systems

Critical Applications:

• Mandatory replacement during engine overhaul

• Required when timing chain elongation exceeds 3%

• Essential repair item for P0016/P0017 fault codes

2. Features & Advantages

3. Working Principle

Power Transmission Path:
Crankshaft gear → Timing chain → This gear → Camshaft → Valve train

Synchronization Precision:

• ≤0.5° crankshaft angle deviation (equivalent to <0.1mm gear backlash)

• Dynamic compensation: Hydraulic tensioner maintains constant chain tension

4. Vehicle Compatibility Chart

5. Installation Precautions

Critical Steps:

1. Position Locking:

   • Use MB SST 000-589-00-30-00 to secure crankshaft at TDC

   • Camshaft alignment holes must match perfectly (<0.2mm tolerance)

2. Torque Procedure:

    

   Stage 1: Pre-tighten 50Nm → Stage 2: Final 80Nm → Stage 3: Additional 90° rotation  

3. Prohibited Actions:

   • Never use impact wrenches (causes micro-deformation)

   • Stretch bolts are single-use only (MB mandatory standard)

6. Common Issues & Solutions