HITACHI
12668649
Ver Especificações
SolenoidHitachi High-Pressure Gasoline Direct Injection (SIDI / DIG, 150 bar)Euro 56
HITACHI 12668649 Injetor Direto GM Silverado Sierra Tahoe Yukon 5.3L 6.2L V8 EcoTec3 L83 L86 FJ1217
Plataforma do motor:GM 4.3L V6 & 5.3L / 6.2L EcoTec3 Gen V V8 (LV3 / L83 / L84 / L86 / L87) →
REFERÊNCIA OE
12623116, 12656932, 12668390, FJ1217, 842-12384, 12698484VÁLVULA DE CONTROLO
-BICO INJETOR
-PRESSÃO DO RAIL
150 barEMISSÕESEuro 5 / Euro 6
GARANTIA12 Meses
03
Especificações Técnicas
| Especificação | Valor |
|---|---|
| part_number | 12668649 |
| oem_reference | 12668649 |
| manufacturer | HITACHI |
| system_type | Fuel Injector |
| pressure_rating | 150 bar (2175 psi) |
| operating_temperature | -40°C to +135°C |
| flange_mount_torque | 12 N-m (106 lb-in) |
| high_pressure_line_torque | 28 N-m (21 lb-ft) |
| diagnostic_dtc | P0300, P0301, P0171, P0172 |
| Pressão de trabalhoEspec. Principal |
MONTAGEM DE CIRCUITO
Bomba de alta pressão compatível (Montagem do circuito de combustível)
Opera no mesmo circuito de alta pressão Common Rail. Ao diagnosticar pressão baixa (P0087), verifique a vazão da bomba antes de trocar os injetores.
HITACHICorrespondência exata de motor e chassi
12692511Gasoline Direct Injection (GDI) • 150 bar
🚙 Chevrolet Silverado 1500 / Tahoe / Suburban (L83)
HITACHICorrespondência exata de motor e chassi
12694551Gasoline Direct Injection (GDI) • 150 bar
🚙 Chevrolet Silverado 1500 / Tahoe / Suburban (L83)
GMCorrespondência exata de motor e chassi
12698485Gasoline Direct Injection (GDI) • 200 bar
🚙 Chevrolet Silverado 1500 / Tahoe / Suburban (L83)
HITACHICorrespondência exata de motor e chassi
12668390Gasoline Direct Injection (GDI) • 200 bar
🚙 Engine Code L83
BOSCHCorrespondência exata de motor e chassi
12698944Gasoline Direct Injection (GDI) • 200 bar
🚙 Engine Code L83
04
Dicas de instalação
- 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 12 N-m (106 lb-in).
- Torque high-pressure hydraulic tube fittings using a calibrated flare nut wrench to 28 N-m (21 lb-ft).
- Prime low-pressure fuel circuit, cycle ignition key 3-4 times, and inspect for high-pressure hydraulic leaks before road test.
Dicas e Avisos:
- 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
Codigos de Falha (DTC) e Protocolos de Diagnostico
Codigos de falha diagnosticos (DTC) comuns acionados quando este injetor common rail apresenta desgaste, falhas de circuito ou desvio:
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.
PROTOCOLOS DE OFICINA
Protocolos Técnicos de Diagnóstico & Manutenção
Procedimentos de oficina verificados, valores limite de teste e normas de serviço para este conjunto.
Protocolo de Diagnóstico de Oficina
Ler protocolo técnicoTeste de Retorno de Injetores Common Rail: Valores e Limites
SOP DE OFICINA DIESEL COMMON RAIL
Ler protocolo técnicoRemoção de Injetor Preso e Descarbonização | Guia SOP
PROTOCOLO DE MONTAGEM E INSTALAÇÃO
Ler protocolo técnico