35320-2G720
BOSCH 35320-2G720 High Pressure Fuel Pump Hyundai Sonata Santa Fe Kia Optima Sorento 2.4L GDI 2.0T
35320-2G730, 35320-2G700, 0261520282Integrated Normally Open 12V Pulse-Width Modulated SCV-150 barVehicle & Engine Fitment
Technical Specifications
| Specification | Value |
|---|---|
| System Type | Bosch HDP-5 Radial Mechanical Plunger High-Pressure Fuel Pump |
| Operating PressureCore Spec | |
| Actuation Mechanism | Exhaust Camshaft Lobe via Roller Tappet Lifter 35325-2G700 |
| Mounting Flange Torque | 13 N·m Evenly tightened cross pattern |
| High Pressure Line Torque | 27 N·m Flare Nut Connection |
| Pressure Regulator Valve | Integrated Normally Open 12V Pulse-Width Modulated SCV |
| Common Fault Codes | P0087 (Fuel Rail Pressure Too Low), P0088 (Rail Pressure Too High), P0172 (Fuel Trim Rich) |
| Workshop Precaution | Inspect cam roller follower 35325-2G700 for scoring; verify oil is not fuel-diluted from torn plunger seal |
Matched High-Pressure Fuel Injectors (Fuel Circuit Assembly)
Directly supplied by this high-pressure pump. Verify injector backleak balance if rail pressure fails to build during engine cranking.
Installation Tips
- [
- {
- "step": 1,
- "title": "Depressurize Fuel Rail & Disconnect Wiring",
- "instruction": "Depressurize fuel line by removing fuel pump fuse. Disconnect electrical connector from high pressure flow control solenoid."
- },
- {
- "step": 2,
- "title": "Disconnect Fuel Feed & High Pressure Pipes",
- "instruction": "Remove low pressure rubber supply line clamp. Loosen high-pressure flared fuel pipe connection (27 N·m union nut)."
- },
- {
- "step": 3,
- "title": "Remove Flange Bolts & Inspect Roller Tappet",
- "instruction": "Back out mounting flange bolts evenly in alternating turns. Remove pump body and extract roller lifter 35325-2G700. Check for surface galling."
- },
- {
- "step": 4,
- "title": "Install Pump with New O-Ring & Final Torque",
- "instruction": "Install new lubricated Viton seal ring. Position pump squarely and torque flange bolts evenly to 13 N·m. Torque high pressure steel pipe to 27 N·m."
- }
- ]
Diagnostic Trouble Codes & Fault Protocols
Common diagnostic trouble codes (DTCs) triggered when this common rail injector experiences wear, circuit faults, or calibration drift:
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.
Technical Diagnostic & Service Protocols
Authoritative field procedures, diagnostic testing thresholds, and service SOPs for this assembly.