HITACHI
12641740
Technische Daten
SolenoidHitachi High-Pressure Gasoline Direct Injection Pump (GDI HPFP, 150 bar)Euro 56
HITACHI 12641740 Hochdruckpumpe GM Chevy Equinox Buick Regal 2.4L LEA 2.0L LHU HM10008
Motorenplattform:GM 2.4L Ecotec SIDI DOHC 16V (LEA / LAF / LUK) →
OE-REFERENZ
12608371, 12633423, HM10008, HPP0006, GDP103, 217-3440STEUERVENTIL
-EINSPRITZDÜSE
-BETRIEBSDRUCK
150 barABGASNORMEuro 5 / Euro 6
GARANTIE12 Monate
02
Fahrzeug- und Motorverwendung
03
Technische Daten
| Spezifikation | Wert |
|---|---|
| part_number | 12641740 |
| oem_reference | 12641740 |
| manufacturer | HITACHI |
| system_type | High Pressure Fuel Pump |
| pressure_rating | 150 bar (2175 psi) |
| operating_temperature | -40°C to +135°C |
| flange_mount_torque | 15 N-m (11 lb-ft) |
| high_pressure_line_torque | 30 N-m (22 lb-ft) |
| diagnostic_dtc | P0087, P0089, P0172, P0300 |
| BetriebsdruckKernwert |
04
Einbauhinweise
- 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 15 N-m (11 lb-ft).
- 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.
Hinweise & Warnungen:
- 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.
05
Fehlercodes (DTC) & Diagnoseprotokolle
Häufige Diagnose-Fehlercodes (DTCs), die ausgelöst werden, wenn dieser Common-Rail-Injektor Verschleiß, Schaltkreisfehler oder Kalibrierungsabweichungen aufweist:
P0087Critical
Fuel Rail / System Pressure Too Low
Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.
P0201 - P0208High
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.
P0300 / P0301+High
Cylinder Misfire & Balancing Deviation
Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.
P0088High
Fuel Rail / System Pressure Too High
Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.
WERKSTATT-LEITFÄDEN
Technische Diagnose- & Service-Protokolle
Verifizierte Prüfverfahren, Fehlercode-Grenzwerte und Werkstatt-SOPs für diese Baugruppe.
COMMON-RAIL WERKSTATT-DIAGNOSE
Technischen Leitfaden lesenHochdruckpumpe Diagnose: P0087 Fehler & Bosch CP4 Test
COMMON-RAIL WERKSTATT-DIAGNOSE
Technischen Leitfaden lesenZumesseinheit ZME IMV SCV Diagnose: P0088 Fehlertest
OBD-II-DIAGNOSEPROTOKOLL
Technischen Leitfaden lesenDiagnoseleitfaden P0087: Raildruck zu niedrig
COMMON-RAIL WERKSTATT-DIAGNOSE
Technischen Leitfaden lesen