Genuine Sinotruk HOWO O-Ring Seal MQ6-56333-3258 | High-Temperature Sealing for MC11 & MC13 MAN Engines

This original O-ring (Part No. MQ6-56333-3258) is manufactured to the exact tolerances required by MAN technology standards.

Technical Specifications:
Part Name: Pipe Clip / Line Support BracketPart Name: O-Ring / Sealing Ring
Part Number: MQ6-56333-3258
Engine Series: Sinotruk MC07, MC11, MC13 (MAN Licensed Tech)
Vehicle Series: HOWO T7H, HOWO T5G, SITRAK C7H, SITRAK G7
Material: High-performance Fluoroelastomer (Viton/FKM)
Color: Green or Brown (depending on batch/application)
Chemical Resistance: Excellent resistance to engine oil, diesel, and hydraulic fluids

Installation Notes

1. Strict Cleanliness: Before removing the old seal, clean the surrounding area with a solvent. Even a single grain of sand on the MQ6-56333-3258 seating groove will cause a high-pressure leak.
2. The "Lube" Rule: Never install this O-ring dry. Apply a thin coating of the fluid the seal will be contacting (e.g., if it's an oil seal, use clean engine oil) to allow it to slide into place without rolling.
3. Inspect for "Twist": Once seated, run your finger along the circumference. If the O-ring feels "wavy" or twisted, remove and re-seat it. A twisted O-ring will shear as soon as the engine builds pressure.
4. Avoid Sharp Tools: Never use a screwdriver to pry the new seal into place. Use a dedicated plastic O-ring pick to avoid scoring the metal housing.
5. One-Time Use: O-rings develop a "set" (shape) once compressed under heat. Never reuse the MQ6-56333-3258 once the housing has been disassembled; always replace with new genuine howo parts.