Product Features

• Structure: A rigid, one-piece tube made of oil-resistant, heat-resistant polymer composite, with precision-machined threaded and barbed ends for secure connections.

• Performance: The polymer material withstands fuel exposure and temperatures up to 120°C, while its rigid construction resists vibration-induced fatigue and maintains a consistent fuel flow path.

• Design: Factory-calibrated length and end fittings ensure direct compatibility with original fuel return hoses and injectors, enabling quick, tool-free installation.

Core Function

• Connects the fuel return hoses from the injectors to the main return line, ensuring excess fuel is reliably routed back to the fuel tank.

• Maintains a leak-free connection to prevent fuel loss and maintain proper pressure regulation in the high-pressure fuel system.

• The rigid design minimizes flow restriction and vibration, protecting the fuel system and optimizing injector performance.

Fuel Return Pipe Connector 200V05701-0374 — OEM SINOTRUK Engine Oil Return Fitting for MC11/MC13

This unassuming little connector quietly performs one of the most critical jobs inside your MC11 or MC13 engine: it guides separated crankcase oil back to the sump and keeps crankcase pressure perfectly balanced. When it fails, oil mist escapes, turbo seals suffer, and your fleet loses money. OEM part number 200V05701-0374 ensures a factory-precise seal every single time — and we deliver it straight from China at a price that protects your margins.

Application Scenario — Where This Connector Lives and What It Does

The Fuel Return Pipe Connector 200V05701-0374 is the oil-return short pipe mounted on the oil-gas separator (breather) assembly of SINOTRUK MC11 and MC13 diesel engines. Its daily mission includes:

• Oil Recovery: Channeling re-condensed lubricating oil from the crankcase ventilation separator back into the oil sump, preventing oil waste and external leakage.
• Pressure Balancing: Maintaining stable crankcase pressure so blow-by gases exit through the correct path rather than forcing past turbocharger seals or valve stem seals.
• Emission Compliance: Supporting China-V (National V) and China-VI (National VI) emission standards by ensuring the closed crankcase ventilation circuit remains sealed.

Applicable Vehicles:

• SINOTRUK SITRAK C7H / G7 heavy-duty tractors (China-V / China-VI)
• SINOTRUK HOWO T7H / TX heavy-duty trucks (China-V / China-VI)
• Any platform equipped with MC11.44 / MC11.46 / MC13.48 / MC13.54 power units

Features and Benefits — Why Procurement Managers Choose This Part

1. 100 % OEM-Matched Dimensions — Manufactured to the exact SINOTRUK drawing for 200V05701-0374, guaranteeing drop-in fitment with zero adapter modifications.
2. High-Grade Sealing Material — Integrated O-ring compound resists diesel fuel, engine oil, and temperatures up to 150 °C, eliminating premature weeping.
3. Corrosion-Resistant Body — The connector body withstands acidic blow-by condensate, extending service life beyond 200,000 km under normal operating conditions.
4. Factory-Direct Pricing — Sourced and shipped directly from our Jinan warehouse, cutting out middlemen and reducing your per-unit cost by up to 30 % compared to overseas distributors.
5. Fast, Reliable Delivery — Standard lead time of 3–7 working days for stocked items; express air freight available for urgent downtime situations.
6. Flexible MOQ — Whether you need 5 pieces for a workshop or 5,000 for a regional distribution center, we scale to your demand.

Technical Specifications

OEM / ODM Capability — White-Label and Custom Packaging

JINAN METTLEAD AUTO SALES CO.LTD. understands that distributors and fleet operators often need parts under their own brand identity. Here is what we offer:

• White-Label Packaging: Your logo, part number, and barcode printed on individual boxes — minimum order as low as 200 pcs.
• Custom Packaging Design: Full-color carton artwork, blister packs, or bulk master cartons tailored to your warehouse workflow.
• Strict Quality Control: Every batch undergoes dimensional inspection, O-ring hardness testing, and pressure-decay leak testing before shipment.
• Factory Visits Welcome: We invite procurement teams to inspect our Jinan facility, audit quality processes, and verify stock levels in person.

Explore our full range of engine components — including cylinder heads, turbochargers, injectors, and gasket kits — on our SINOTRUK HOWO Engine Parts category page.

FAQ — Fuel Return Pipe Connector 200V05701-0374

Q1: What are the symptoms of a failing fuel return pipe connector on the MC11/MC13 engine?

When this connector cracks or its O-ring hardens, you will notice oil mist around the separator housing, a slight drop in oil level between services, and potentially a fault code related to excessive crankcase pressure. Replacing it early prevents costly turbo seal damage.

Q2: Is 200V05701-0374 interchangeable with other SINOTRUK return pipe connectors?

No. This part is specifically dimensioned for the MC11/MC13 oil-gas separator bracket. Similar-looking connectors from the MC07 or WP-series engines differ in bore diameter and O-ring groove depth. Always match the OEM number to avoid leaks.

Q3: How do I verify that this connector is genuine-quality?

Each piece we ship carries the correct OEM marking and passes a pressure-decay leak test at 0.05 MPa. We can provide batch inspection reports and material certificates upon request.

Q4: What is the recommended replacement interval?

SINOTRUK does not specify a standalone interval for this connector. Best practice is to inspect it during every oil-gas separator service — typically every 100,000–150,000 km — and replace immediately if the O-ring shows hardening, swelling, or surface cracking.

Q5: Can I order a small trial quantity before committing to bulk?

Absolutely. We support sample orders starting from just 1 piece so you can verify fitment and quality before scaling up your purchase.

Ready to Secure Your Supply? Let’s Talk.

Every hour a truck sits idle waiting for a 45-gram connector is an hour of lost revenue. Don’t let a minor part create a major problem. Reach out to our team today — share your required quantity, preferred shipping method, and any custom packaging needs, and we will respond with a competitive quotation within 12 hours.

Contact Us Now — Get Your Free Quote for 200V05701-0374

JINAN METTLEAD AUTO SALES CO.LTD. — Your factory-direct partner for SINOTRUK, SITRAK, HOWO, SHACMAN, FAW, WEICHAI, DONGFENG, and FOTON genuine-quality truck parts, shipped worldwide.