A2740700501
BOSCH A2740700501 Pompe Haute Pression Mercedes-Benz C300 E300 GLC300 2.0T M274
2740700501, A2740700401, 0261520215, 0261520216Integrated Solenoid Quantity Control Valve (Flow Metering)-200 barCompatibilité véhicules et motorisations
| Véhicule | Moteur | Années |
|---|---|---|
| Mercedes-Benz C300 W205 | Mercedes-Benz M270 / M274 (1.6L & 2.0L BlueDIRECT Turbo) | 2015-2021 |
| Mercedes-Benz E300 W213 | Mercedes-Benz M270 / M274 (1.6L & 2.0L BlueDIRECT Turbo) | 2017-2020 |
| Mercedes-Benz GLC300 X253 | Mercedes-Benz M270 / M274 (1.6L & 2.0L BlueDIRECT Turbo) | 2016-2020 |
Spécifications techniques
| Spécification | Valeur |
|---|---|
| Type de système | Camshaft-Driven Single-Piston High-Pressure Fuel Pump (HPFP) |
| Pression de serviceSpéc. clé | |
| Drive Mechanism | Three-lobe exhaust camshaft actuation with roller tappet bucket |
| Flange Mounting Bolt Torque | 12 N·m (tighten evenly in cross-pattern to prevent housing tilt) |
| High Pressure Line Torque | 27 N·m (high pressure steel flare nut connection) |
| Flow Control Valve ResistanceSpéc. clé | |
| Codes défauts fréquents | P0087 (Fuel Rail Pressure Too Low), P0088 (Fuel Rail Pressure Too High), P0016 (Camshaft Correlation) |
| Workshop Precaution | Inspect roller tappet for wear prior to installation; check engine oil for gasoline dilution odor |
Pompe haute pression associée (Ensemble circuit de carburant)
Fonctionne sur le même circuit haute pression Common Rail. En cas de chute de pression (P0087), vérifier le débit de la pompe avant de remplacer les injecteurs.
Conseils de montage
- [
- {
- "step": 1,
- "title": "Relieve Fuel Line Residual Pressure & Disconnect Battery",
- "instruction": "Disconnect negative battery lead. De-pressurize low-pressure fuel circuit and cover HPFP with shop towels to catch fuel discharge during line disconnection."
- },
- {
- "step": 2,
- "title": "Remove Acoustic Cover & Detach Fuel Flow Control Plug",
- "instruction": "Unclip sound deadening foam around pump housing. Disconnect electrical connector from integrated fuel volume metering solenoid."
- },
- {
- "step": 3,
- "title": "Inspect Camshaft Roller Tappet & Fit New Viton O-Ring",
- "instruction": "Evenly loosen dual flange mounting bolts half-turn at a time. Withdraw HPFP and remove roller tappet. Inspect tappet surface for scuffing and lubricate with fresh engine oil."
- },
- {
- "step": 4,
- "title": "Install HPFP, Torque Mounting Bolts & Reconnect Lines",
- "instruction": "Position HPFP onto cylinder head. Alternately tighten mounting bolts to 12 N·m. Torque high pressure outlet flare nut to 27 N·m. Start engine and verify zero fuel weepage."
- }
- ]
Codes de Defaut (DTC) & Protocoles de Diagnostic
Codes de defaut diagnostiques (DTC) courants déclenchés lorsque cet injecteur common rail subit une usure, des pannes de circuit ou une dérive d'étalonnage:
Fuel Rail / System Pressure Too Low
Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.
Injector Circuit Malfunction / Open Circuit
Solenoid coil resistance drift (0.2-0.5 Ω) or piezo stack degradation triggers driver stage shutdown on affected cylinders.
Cylinder Misfire & Balancing Deviation
Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.
Fuel Rail / System Pressure Too High
Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.
Protocoles Techniques de Diagnostic & Réparation
Procédures d'atelier vérifiées, seuils de test et guides d'intervention pour cet ensemble.