12698552
BOSCH 12698552 Injetor Alta Pressão Cadillac CT4 CT5 XT4 2.0T LSY 350 Bar
12707255, 0261500690, 0261500691High-Pressure Solenoid Multi-Hole Injector Nozzle-350 barEspecificações Técnicas
| Especificação | Valor |
|---|---|
| Tipo de sistema | Bosch HDEV6 350-bar High-Pressure Direct Gasoline Injector |
| Pressão de trabalhoEspec. Principal | |
| Spray Pattern | Advanced multi-hole laser-drilled atomizing pattern for Tripower cam profiles |
| Fuel Rail Bolt Torque | 10 N·m (holding bracket retaining bolts) |
| High Pressure Pipe Torque | 28 N·m Flare Nut Connection |
| Coil Resistance | 1.4 - 1.8 Ω at 20°C (High-voltage peak-and-hold driver circuit) |
| Códigos de falha comuns | P0300 (Random Misfire), P0301-P0304 (Cylinder Misfire), P0171 (System Lean Bank 1) |
| Workshop Precaution | Install new Teflon sealing rings using GM pilot tool; never reuse Teflon combustion seals |
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.
Dicas de instalação
- [
- {
- "step": 1,
- "title": "Depressurize 350-bar Fuel System & Disconnect Battery",
- "instruction": "Depressurize high pressure fuel rail via diagnostic scan tool or fuel pump relay isolation. Disconnect battery 12V negative terminal."
- },
- {
- "step": 2,
- "title": "Remove Upper Intake Ducting & Fuel Rail Shielding",
- "instruction": "Remove charge air piping and acoustic foam insulator. Loosen the high pressure steel fuel rail line (28 N·m) with backup counter-wrench."
- },
- {
- "step": 3,
- "title": "Extract Injectors & Fit New Teflon Sealing Rings",
- "instruction": "Use GM injector puller tool EN-47277 to withdraw injectors. Install replacement Teflon combustion seals using expander and compression guide."
- },
- {
- "step": 4,
- "title": "Torque Rail Fasteners & Check For Fuel Leaks",
- "instruction": "Press injectors into cylinder head bores. Torque fuel rail retaining bolts to 10 N·m. Tighten high pressure line to 28 N·m. Prime system and inspect for leaks."
- }
- ]
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:
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.
Protocolos Técnicos de Diagnóstico & Manutenção
Procedimentos de oficina verificados, valores limite de teste e normas de serviço para este conjunto.