12692511
HITACHI 12692511 Pompe Haute Pression Chevrolet Silverado GMC Sierra 4.3L V6 LV3
12658481, 12641740, 12674508, HM10043, HPP0027, GDP114--150 barSpécifications techniques
| Spécification | Valeur |
|---|---|
| part_number | 12692511 |
| oem_reference | 12692511 |
| manufacturer | HITACHI |
| system_type | High Pressure Fuel Pump |
| pressure_rating | 150 bar (2175 psi) |
| operating_temperature | -40°C to +135°C |
| flange_mount_torque | 10 N-m (89 lb-in) |
| high_pressure_line_torque | 30 N-m (22 lb-ft) |
| diagnostic_dtc | P0087, P0089, P0172, P0300 |
| Pression de serviceSpéc. clé |
Injecteurs de carburant associés (Ensemble circuit de carburant)
Alimenté directement par cette pompe haute pression. Vérifier le débit de retour des injecteurs si la pression de rail ne monte pas au démarrage.
Conseils de montage
- Depressurize the fuel system completely via diagnostic scan tool or by removing the fuel pump fuse prior to line disassembly.
- Clean all surrounding bracket areas thoroughly using residue-free brake cleaner to prevent abrasive particulate ingress.
- Inspect the mechanical camshaft lobe and roller follower or clean injector bore seating surfaces before hardware alignment.
- Install component using fresh factory O-rings or Teflon combustion chamber seals lubricated only with clean motor oil.
- Torque mounting flange fasteners in alternating increments to 10 N-m (89 lb-in).
- Torque high-pressure hydraulic tube fittings using a calibrated flare nut wrench to 30 N-m (22 lb-ft).
- Prime low-pressure fuel circuit, cycle ignition key 3-4 times, and inspect for high-pressure hydraulic leaks before road test.
- Always replace single-use high-pressure metal fuel lines and micro-filter seals whenever disconnected.
- Verify camshaft driving lobe surfaces for scoring or flat spots before installing any mechanical pump.
- Reset long-term and short-term fuel trim adaptations via OBD-II diagnostic scanner after physical replacement.
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.