Product Introduction: A high-temperature and corrosion-resistant rubber hose with reinforced construction and precision-molded quick-connect fittings. Its flexible design accommodates engine vibration and movement, while the rubber material resists coolant, heat, and aging for long service life.

Function: Carries heated coolant away from the air compressor back to the engine’s cooling system. This continuous circulation dissipates the heat generated during compressed air production, preventing the air compressor from overheating and ensuring its reliable operation.

Cooling Water Return Pipe-Air Compressor 201V06303-5466 SINOTRUK – OEM Quality, Factory Direct

Every heavy-duty engine breathes through its air compressor — and every air compressor depends on a reliable cooling circuit to stay alive under extreme thermal loads. The Cooling Water Return Pipe-Air Compressor 201V06303-5466 is the critical conduit that carries heated coolant away from the air compressor and returns it to the engine block, completing the cooling loop that protects your SINOTRUK powertrain from overheating, cavitation, and premature wear.

Engineered to OEM specifications for SINOTRUK MC11/MC13 engines, this return pipe serves as the circulatory lifeline between the air compressor and the engine cooling system on SITRAK C7H, HOWO T7H, HOWO A7, and National V/VI emission-standard heavy trucks. When this pipe fails, coolant flow stops — and compressor seizure follows within minutes.

Key Functions & Benefits of the 201V06303-5466 Cooling Water Return Pipe

• Completes the Cooling Circuit: Channels post-heat-exchange coolant from the air compressor housing back into the engine’s water jacket, maintaining continuous thermal regulation.
• Prevents Air Compressor Overheating: Ensures uninterrupted coolant flow that keeps compressor cylinder temperatures within the 80–95°C operating window, extending compressor service life by up to 40%.
• OEM-Grade Fitment: Manufactured to match the exact bend radius, port diameter, and mounting geometry of the original SINOTRUK part — no modifications, no adapters, no guesswork.
• Corrosion-Resistant Construction: Built from high-grade aluminum alloy with anti-oxidation surface treatment to resist coolant-induced galvanic corrosion over 500,000+ km of service.
• Pressure-Tested Reliability: Each pipe undergoes 0.3 MPa hydrostatic pressure testing to guarantee zero leakage under real-world cooling system pressures.
• Fast Replacement, Minimal Downtime: Direct bolt-on design allows field replacement in under 30 minutes — keeping your fleet on the road, not in the shop.

Application & Vehicle Compatibility

The 201V06303-5466 cooling water return pipe is purpose-built for the following SINOTRUK platforms equipped with MC11 and MC13 series engines:

• SITRAK C7H — 6×4 Tractor, 8×4 Cargo (National V / National VI)
• HOWO T7H — 6×4 Tractor, 8×4 Dump Truck (National V / National VI)
• HOWO A7 — 6×4 Tractor (National V)
• HOWO TX — 6×4 Tractor (National VI)
• SITRAK G7 — 8×4 Mixer, Cargo Chassis (National VI)

This pipe connects the coolant outlet port on the air compressor to the return inlet on the engine cylinder block, forming the low-pressure return leg of the compressor cooling sub-circuit.

Technical Specifications

OEM/ODM Capability & Custom Packaging

At JINAN METTLEAD AUTO SALES CO., LTD., we understand that distributors and fleet operators have unique branding and packaging requirements. Our factory-direct supply chain offers:

• White-Label Packaging: Neutral boxes with no manufacturer branding — ready for your own label or regional market requirements.
• Custom Packaging: Your logo, part number, barcode, and multilingual product information printed on professional retail-ready packaging.
• Strict Quality Control: Every batch undergoes dimensional inspection, pressure testing, and surface quality verification before shipment. Defect rate maintained below 0.3%.
• Bulk Order Flexibility: MOQ as low as 5 pieces for trial orders; volume pricing available for container-load quantities.
• Cross-Reference Support: We help you match superseded or regional part numbers to the correct current OEM specification.

Whether you stock parts for a single fleet or distribute across an entire country, our supply model adapts to your business — not the other way around. Explore our full range of SINOTRUK HOWO Engine Parts to consolidate your sourcing.

Frequently Asked Questions (FAQ)

What happens if the 201V06303-5466 cooling water return pipe leaks or cracks?

When this return pipe develops a leak, coolant can no longer circulate back from the air compressor to the engine. The compressor overheats rapidly, potentially seizing within minutes. Simultaneously, coolant loss triggers engine overheating warnings. Replacing the pipe immediately prevents cascading damage to both the compressor and the engine cooling system.

How do I confirm this part fits my specific truck?

Verify that your vehicle uses a SINOTRUK MC11 or MC13 engine and check the original part number stamped on your existing return pipe. The number 201V06303-5466 should match exactly. If you have a VIN or engine serial number, send it to us and we will cross-reference compatibility for you.

Is this an original SINOTRUK part or an aftermarket replacement?

We supply OEM-equivalent parts manufactured to the same dimensional tolerances, material specifications, and pressure ratings as the original factory component. Every pipe passes the same hydrostatic pressure test (0.3 MPa) required by SINOTRUK’s own quality standard.

What is the typical service life of this cooling water return pipe?

Under normal operating conditions with properly maintained coolant (correct concentration, regular replacement intervals), this pipe delivers reliable service for 300,000–500,000 km. Premature failure is usually caused by contaminated coolant, over-pressurization, or improper installation torque.

Can I order a small quantity for testing before committing to bulk?

Absolutely. We welcome trial orders starting from as few as 5 pieces. This lets you verify fitment, quality, and packaging before scaling up. Volume discounts apply once you move to regular procurement.

Does this pipe require any gaskets or seals for installation?

Yes — O-ring seals at both connection points should be inspected and replaced during installation. We recommend ordering replacement O-rings alongside the pipe to ensure a leak-free seal. Contact us with your engine model and we will confirm the correct seal part numbers.

Request Your Quote Today — Factory-Direct Pricing, Fast Delivery

Stop overpaying for middleman markups. As a China-based factory-direct supplier specializing in SINOTRUK, SITRAK, HOWO, SHACMAN, FAW, WEICHAI, DONGFENG, and FOTON truck parts, JINAN METTLEAD AUTO SALES CO., LTD. delivers the 201V06303-5466 Cooling Water Return Pipe at competitive wholesale pricing with reliable global shipping.

• ✅ Factory-direct pricing — no intermediaries
• ✅ Complete parts catalog — one supplier, thousands of SKUs
• ✅ Fast, reliable delivery worldwide
• ✅ Flexible, secure payment methods
• ✅ Factory visits welcome for verification

Ready to secure your supply?
Contact us now with your required quantity, destination country, and any custom packaging needs. Our team responds within 12 hours with a detailed quotation including shipping options.