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Brand: C.OEFT
OE numbers: 13028-1KT0A
Product Name: Timing Chain Kit
Compatible model:HR12DDR
Product status: New
Number of teeth on the product:
Product weight:2.519kg
Packaging size: 40X40X10 cm
Product packaging: Neutral Packaging
Car Series: Japanese
Car Type: for Nissan
As the "core framework" of the timing system for Nissan HR12DDR/HR12DE engines, the components of the kit work together to maintain the accuracy of mechanical timing:
·Timing Chain (13028-1KT0A/13028-EE50A): Connects the crankshaft (lower part of the engine) and camshaft (upper part of the cylinder head), strictly maintaining a 1:2 rotation ratio (a core ratio for four-stroke engines). It ensures that the intake and exhaust valves open and close at the precise moments corresponding to piston movements (intake → compression → power → exhaust strokes), avoiding "timing misalignment"—a fault that can cause valve-piston collision, resulting in bent valves or even engine failure.
·Tensioner: Automatically adjusts chain tightness in real time. When the chain stretches slightly due to long-term wear, the tensioner pushes the guide using engine oil pressure to compensate for slack, maintaining optimal chain tension and preventing "tooth skipping" (which disrupts timing) and abnormal noise.
·Guides: Fix the chain’s running path, preventing lateral deviation during high-speed operation. They ensure stable engagement between the chain and camshaft/crankshaft sprockets, especially adapting to the high-load working conditions of the HR12DDR supercharged engine and reducing abnormal component wear.
2. Adapting to HR12 Engine Characteristics to Optimize Performance
·Supporting Supercharged Power (HR12DDR): The kit’s high-strength chain and tensioner are specifically designed for the turbocharged torque peaks of the HR12DDR. Even under high-load scenarios such as "full-throttle acceleration," they can maintain timing accuracy, ensuring the supercharger and valve train work in coordination and avoiding power loss or engine knock caused by timing errors.
·Improving Fuel Economy of Naturally Aspirated Engines (HR12DE): The low-friction chain and guides reduce the mechanical resistance of the timing system by 25%, helping the HR12DE engine (focused on fuel efficiency) achieve a 3%-5% improvement in fuel consumption under urban stop-and-go driving conditions. This aligns with Nissan’s design goal of "balancing performance and energy efficiency" for its 1.2L engine series.
·Engine-Specific Design: Strictly developed in line with the parameters of Nissan’s 1.2L HR12DDR (supercharged direct injection) and HR12DE (naturally aspirated) engines. The chain length, sprocket tooth profile, tensioner stroke, and guide dimensions within the kit are 100% matched to Nissan’s OE specifications, avoiding issues like "chain slack" or "guide misfit" that are common with universal kits.
·Two Part Nos. Covered for Wider Adaptability: Simultaneously compatible with two core Nissan OE part numbers—13028-1KT0A (mostly for HR12DDR supercharged variants) and 13028-EE50A (mostly for HR12DE naturally aspirated variants). There’s no need to distinguish between engine subtypes during procurement, providing a "one-stop solution" for repair shops servicing multiple Nissan 1.2L models.
·Plug-and-Play for Efficient Installation: All components (timing chain, tensioner, upper/lower guides, damper) align precisely with the mounting positions of the HR12 series engine’s timing system. No modifications to the engine block or timing cover are required, reducing installation time by 40% compared to sourcing scattered, mismatched parts.
2. Next-Generation Material Upgrades for Significantly Enhanced Durability
·High-Strength Timing Chain: Made of chrome-nickel alloy steel and processed through a three-step heat treatment process (normalizing → carburizing → quenching). Its tensile strength is increased by 20% (up to 1,300 MPa), and surface hardness reaches HRC 58-62, effectively resisting stretching and tooth wear—especially suitable for the high-torque operating conditions of the HR12DDR supercharged engine (maximum torque up to 143 N·m).
·Reinforced Tensioner: The tensioner housing is crafted from heat-resistant PA66+GF35 engineering plastic (reinforced with 35% glass fiber), which can withstand the engine’s operating temperature of 180-210℃ without aging or cracking. The internal hydraulic piston is coated with a wear-resistant ceramic layer, ensuring stable oil pressure regulation and preventing "sudden pressure loss" that causes chain slack.
·Low-Friction Guides & Damper: The guides are coated with polytetrafluoroethylene (PTFE), reducing friction resistance with the chain by 30%. This minimizes noise while extending the guide service life to 180,000 km. The damper’s rubber core is made of high-damping ethylene propylene diene monomer (EPDM), which can absorb 80% of chain vibration during high-speed operation (up to 6,500 rpm).
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