Radiator Outlet Water Hose 1-21437871-1 121437-8711 1214378711 For ISUZU FVZ34 6HK1 7.8L Diesel — OEM Engine Coolant Reservoir Pipe
| OEM Part Number: | 1-21437871-1 / 1214378711 / 121437-8711 | Part Name: | Radiator Outlet Water Hose / Engine Coolant Reservoir Hose / Water Tank Downpipe |
| Engine Compatibility: | ISUZU 6HK1 7.8L Diesel | Vehicle Models: | ISUZU FVZ34, FVR34 |
| Material: | High-Strength Steel | Condition: | Brand New — 100% Quality Inspected |
| Warranty: | 12 Months | ||
| High Light: | ISUZU FVZ34 radiator outlet hose,OEM engine coolant reservoir pipe,6HK1 7.8L diesel water hose |
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The Radiator Outlet Water Hose (Engine Coolant Reservoir Hose) with OEM number 1-21437871-1 (also listed as 1214378711, 121437-8711) is a verified direct-fit replacement for ISUZU FVZ34 heavy-duty trucks equipped with the 6HK1 7.8L diesel engine. This critical component ensures reliable connection between the radiator and engine, maintaining consistent coolant flow to prevent overheating and ensure optimal engine performance in demanding commercial transport applications.
If your radiator outlet water hose is failing, you may experience one or more of the following symptoms:
- Coolant Leakage: Visible coolant dripping or pooling under the vehicle
- Engine Overheating: Temperature gauge consistently rising above normal
- Low Coolant Level: Unexplained drop in coolant level
- Steam from Engine Bay: Steam or vapour rising from radiator area
- Coolant Odor: Sweet smell of coolant in engine bay or cabin
| Part Number | 1-21437871-1 121437-8711 1214378711 |
|---|---|
| Product Name | Radiator Outlet Water Hose |
| Car Model | ISUZU FVZ34 |
| Engine Model | ISUZU 6HK1 |
| Condition | 100% Brand New |
| Origin | China Mainland |
| Main Market | Middle East, Asia, Africa, South America, North America & Europe |
| Brand | Model | Chassis / Series | Engine | Notes |
|---|---|---|---|---|
| ISUZU | FVZ34 | Heavy-Duty Truck | 6HK1 7.8L Diesel | Primary application |
| ISUZU | FVR34 | FORWARD 18.0 | 6HK1 7.8L Diesel | Compatible |
| ISUZU | FVR | FORWARD Series | 6HK1-TC | Compatible |
| Feature | Benefit + Verification Signal |
|---|---|
| OEM Specification — ISUZU Genuine Equivalent | Guarantees factory-fit quality and performance |
| High-Strength Steel Construction | Provides exceptional durability and resistance to heat, pressure, and corrosion |
| Precision-Engineered Design | Ensures secure, leak-free connection and eliminates thermal instability |
| Direct Bolt-On Fitment | No modifications required — engineered as direct match for original pipe |
| Enhances Cooling Efficiency | Maintains optimal engine temperature and prevents overheating |
| 100% New — No Core Charge | Guarantees zero wear and full service life |
| QC Item | Verification Method |
|---|---|
| Dimensional Accuracy | Precision inspection to verify all mounting points match OE specifications |
| Material Composition | High-strength steel analysis with corrosion-resistant verification |
| Pressure Test | 100% pressure testing to guarantee zero coolant leakage |
| Temperature Cycle Test | 500+ hour thermal cycling for long-term reliability |
| Corrosion Resistance Test | Salt spray and chemical exposure testing |
| Final Assembly Inspection | 100% visual and dimensional inspection before packaging |
- Allow the engine to cool completely before starting work
- Drain the cooling system or position a drain pan
- Clean the area around pipe connections to prevent contamination
- Inspect all rubber hoses, clamps, and radiator connection for wear
- Use new O-rings or seals if required by workshop manual
- Ensure engine is completely cool and drain cooling system
- Disconnect negative battery terminal
- Remove radiator outlet pipe from vehicle
- Remove old pipe and clean mounting surfaces thoroughly
- CRITICAL: Install new pipe with new seals and gaskets
- Torque mounting bolts to manufacturer's specified settings
- Reconnect all coolant hoses and connections securely
- CRITICAL: Refill cooling system with correct coolant mixture and bleed air
- Start engine and allow to reach operating temperature
- Check for coolant leaks around pipe connections
- Verify cooling system operates correctly
- Inspection: Every 50,000 km / 12 months
- Coolant Replacement: Every 2 years or 40,000 km
- Replacement: Immediately if failure symptoms appear
- Packaging: Protective packaging to prevent shipping damage
- Single Package Volume: 0.012m³
- MOQ: 1 piece
- Payment Terms: T/T, Western Union
- Suitable for: Wholesale distributors, truck parts retailers, commercial vehicle repair shops, and fleet owners
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