Original Dongfeng Renault engine parts O-ring seal D157968

Crafted from OEM-specified fluoroelastomer (FKM, brand-grade Viton), this O-ring seal delivers the same durability as the engine’s original component. FKM is selected for its exceptional resistance to high temperatures, maintaining elasticity from -25°C (cold startup conditions) to 200°C (continuous operation near exhaust manifolds), with short-term tolerance up to 230°C. Unlike standard nitrile (NBR) O-rings that harden, crack, or deform after 5,000+ hours of use, this FKM seal retains structural integrity through 12,000+ hours of engine operation. It also boasts a tensile strength of 16 MPa and tear resistance of 28 kN/m, withstanding engine vibration and assembly stress without breakage—ensuring long-term leak-proof performance

Designed to handle the extreme thermal cycles of Dongfeng Renault engines (from cold starts in -30°C winters to high-load operation at 180°C), this O-ring seal maintains consistent sealing pressure across all temperature ranges. Its FKM material avoids the common issues of low-temperature brittleness (which causes cracks during cold startups) and high-temperature softening (which leads to pressure loss). Even after 5,000+ thermal cycles (alternating between -25°C and 200°C), the seal’s compression set remains below 12% (per ASTM D395 standards)—far lower than the 20% threshold of generic O-rings. This stability ensures reliable sealing in all climates, preventing fluid leaks that could lead to engine overheating or lubrication failure

As an original part, this O-ring seal is tested to withstand all fluids in Dongfeng Renault engines: mineral/synthetic engine oil, ethylene glycol-based coolant, diesel fuel, and lubricating greases. Its FKM material resists swelling (volume increase ≤ 4% after 1,000 hours of immersion in 150°C engine oil) and chemical degradation, avoiding the softening or hardening that plagues low-quality seals. It also repels oxidation from air exposure and resists corrosion from coolant additives, ensuring no material breakdown that could contaminate engine fluids. This chemical stability is critical for engines with extended maintenance intervals (up to 25,000 km), as it eliminates premature seal failure and costly fluid system repairs

Engineered for hassle-free installation in professional repair shops or engine rebuilds, the O-ring seal features a smooth, burr-free surface that slides easily into OE sealing grooves—no specialized tools or adhesives required. Its flexibility allows it to conform to minor surface irregularities in aged engine components, ensuring a tight seal even if grooves have slight wear. As an original part, it includes full OE quality traceability: each unit is marked with a unique batch code, linked to Dongfeng Renault’s manufacturing records (raw material sourcing, production date, quality tests). It undergoes rigorous OE testing: dimensional validation, compression set trials, chemical immersion tests, and temperature cycling checks. Backed by a 18-month OE warranty against defects (e.g., material cracking, dimensional inaccuracies), it guarantees compatibility and performance that matches the engine’s original sealing system