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Brand: C.OEFT
OE numbers: ASBG-BC.276XK-15
Product Name: Timing Chain Kit
Compatible model:/
Product status: New
Number of teeth on the product: /
Product weight:2.9988kg
Packaging size: 40*40*10 cm
Product packaging: Neutral Packaging
Car Series: Germany
Car Type: for Mercedes-Benz New 276 3.0
As the "transmission core" of the timing system of the Mercedes-Benz M276 3.0L engine, the components of the kit work together to achieve three core functions:
·Precise Transmission of Dual Chains: The primary timing chains of the left and right cylinder blocks respectively drive the intake/exhaust camshafts, strictly maintaining a "crankshaft: camshaft = 2:1" transmission ratio. Cooperating with Mercedes-Benz’s VVT system, they precisely control the opening/closing timing of the intake and exhaust valves (error ≤0.5° crank angle), ensuring no interference in the engine’s four-stroke cycle—avoiding the "valve-piston collision" fault caused by timing deviation (the maintenance cost of such faults exceeds 50,000 yuan, and it may damage the turbocharger).
·Variable-Pressure Tension Control: The tensioners dynamically adjust tension according to the engine’s operating conditions (8bar at idle, 12bar at high speed), compensating in real time for chain slack caused by high temperature and high load, and preventing timing confusion caused by "chain tooth skipping" (which leads to sudden power loss, constant fault lights, and even stalling). At the same time, the "torque sensor valve" can buffer the impact of the chain during start-up, reducing transmission noise.
·Stable Balance Shaft Transmission: The balance shaft chain in the kit drives the dual balance shafts of the M276 engine, offsetting the vibration caused by the reciprocating motion of the V6 engine (reducing the idle vibration amplitude to ≤0.05mm). Cooperating with the "positioning and guiding" function of the guides, it avoids "engine resonance noise" caused by balance shaft timing deviation (Mercedes-Benz’s requirement for vibration and noise in luxury vehicles is: in-vehicle noise ≤50dB at idle).
·Engine-Specific Parameter Calibration: Strictly developed based on the timing system structure (dual camshaft, dual balance shaft layout) of the Mercedes-Benz M276 3.0L V6 engine, with core specifications fully matching Mercedes-Benz’s original OE standards:
Dual primary timing chains: Adopt a symmetrical design of 136 links/138 links (corresponding to the transmission needs of the left and right cylinder blocks), with a pitch of 9.525mm and a chain plate thickness of 2.4mm. Designed specifically for the engine’s high-torque operating conditions, it avoids the "single-chain transmission overload" issue common in universal kits, fundamentally resolving Mercedes-Benz’s common timing faults such as "VVT phase deviation" (triggering P0016/P0018 fault codes) and "power output fluctuation";
Hydraulic tensioners: With a pressure adjustment range of 8-12bar, they are precisely compatible with the M276 engine’s high-pressure oil circuit (adapted to the variable valve timing system). Equipped with a built-in "torque sensor valve," they can adjust tension in real time according to engine speed (idle/high speed), preventing both "chain slack and abnormal noise at low speeds" and "accelerated wear due to excessive tension at high speeds";
Guides and sprockets: The mounting hole tolerance of the guides is ≤0.01mm, and the sprocket tooth profile adopts an "involute + tooth modification design" (pressure angle: 22°). The fit clearance with the engine block and camshaft journal is strictly controlled between 0.02-0.03mm, allowing direct replacement of OE parts without any modification. Compatibility covers all M276 3.0L engine models.
·Full-System Synergetic Compatibility, No Wear Deviation Risk: Unlike purchasing OE parts separately (which may involve differences in material hardness and inconsistent wear levels between new and old components), all components of this kit undergo "integrated calibration and production" in the same batch. The hardness of the chain bushing (Rockwell hardness HRC 62-64), wear resistance of the guide’s ceramic coating (wear loss ≤0.05mm/100,000km), and damping coefficient of the tensioner piston (1.2-1.5N·s/mm) are precisely matched, avoiding premature failure of the timing system caused by "local stress concentration." Especially for the M276 engine’s operating conditions of "alternating work of dual turbos and frequent switching between high and low loads," it can reduce abnormal friction between the chain and sprockets, extending the overall service life to over 200,000km (far exceeding the 120,000-150,000km of ordinary kits).
·Adapted to Mercedes-Benz Luxury Engine Bay Layout, Convenient and Efficient Installation: Considering the "V-shaped structure and compact engine bay space" of the M276 engine, the guides in the kit adopt a "segmented curved design" to avoid turbocharger pipelines, intercoolers, and engine brackets; the tensioners use a "side-mounted installation structure," allowing replacement without disassembling the cylinder head. Professional technicians can complete the full set of replacements in only 3.5-4.5 hours in accordance with Mercedes-Benz’s original maintenance procedures, which is 30% more efficient than non-specialized kits, reducing the maintenance labor cost of high-end vehicles.
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