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SINOTRUK HOWO A7 CNG LNG ENGINE WT615.91 T12L Wastegate Control Valve VG1560110426
When the engine is under high load or high torque, or during a sudden deceleration (throttle lift-off), the engine ECU sends an electrical signal (a PWM pulse) to the control valve. The valve reacts immediately, directing airflow to open the wastegate on the turbocharger. This releases excess exhaust energy, preventing boost pressure from becoming too high-which could otherwise lead to engine knocking, a blown cylinder head gasket, or damage to the turbocharger itself.
Common Faults and Vehicle Symptoms
1. Dashboard Error Codes: Diagnostic trouble codes (DTCs) appear, relating to issues such as "boost pressure too high/low" or "open/short circuit in the exhaust control valve."
2. Speed and Torque Limiting (Loss of Power): The engine enters "limp mode" (protection mode). Under heavy loads, the truck struggles to climb inclines, and the vehicle fails to accelerate even when the accelerator pedal is fully depressed.
3. Exhaust Roaring or Backfiring: Because the exhaust bypass valve (wastegate) fails to open or close correctly, the air-exhaust balance may be disrupted, potentially leading to incomplete fuel combustion.
VG1560110426 Wastegate Control Valve Repair BOM Detailed List
| Parts Category | Core Part Number / Spec | Part Name (EN) | Recommended Qty | Maintenance & Replacement Notes |
|---|---|---|---|---|
| Core Electronic Component | VG1560110426 (Cross Ref: E1645100 / 2x2602) |
Wastegate Control Valve Assembly | 1 pc | Mandatory Replacement Item. Responsible for receiving ECU signals to regulate boost pressure. |
| Control Pneumatic System | Spec: OD Φ8mm / ID Φ5mm (High-temp silicone hose or flame-retardant nylon tube) |
Boost/Vacuum Control Hose | 1 ~ 2 meters | Highly Recommended to Replace. Old hoses become brittle and crack under long-term turbo heat, causing leaks. |
| Hose Fasteners | Spec: Φ8mm - Φ12mm | Heavy-Duty Spring Clamps / Hose Clamps | 4 ~ 6 pcs | Replace with the Hoses. Used to secure air valve inlets/outlets and actuator joints against vibration. |
| Pneumatic Fittings | Spec: M10 Thread or Quick-connect (Depends on original vehicle design) |
Straight / Tee Pneumatic Fittings | 1 set | Inspect & Replace as Needed. Brass or hard plastic fittings may strip or degrade; replace if damaged during removal. |
| Electrical Connectors | 2-Pin Waterproof Connector | Solenoid Valve Wiring Harness Plug Kit | 1 set | Replace Conditionally. If the original plug is melted or corroded, snip the old wire and crimp on a new waterproof pigtail. |
| Mechanical Fasteners | M6 Sems Bolts / Nuts | Control Valve Bracket Mounting Bolts | 2 sets | Backup. Prevents delays if original bolts are rusted out or snapped during disassembly. |
DETAILS
| DESCRIPTION | Wastegate Control Valve | PART NUMBER | VG1560110426 |
| WEIGHT | 0.5kg | VOLUME |
12.0 cm × 8.5 cm × 7.0 cm |
| TRUCK MOLDE | SINOTRUK | QUALITY | Copy,High Copy, OEM,Original |
| MOQ | 1 | WARRANTY | 1 year |
| PAYMENT | TT/WESTEN UNION | SHIPMENT | by air/sea/railway |
| BRAND | SINOSACHS | PLACE OF ORIGIN | JINAN CITY,CHINA |
| STOCK | IN STOCK | APPLICABLE SITE | ENGINE |
| PACKAGE | Carton/Woodenbox | PORT OF LANDING | Qingdao Port,China |
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