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Brand: C.oeft
OE numbers: ASBG-BKJY2.4-16
Product Name: Timing Chain Kit
Compatible model:
Product status: Remanufactured
Number of teeth on the product: /
Product weight: 7.254KG
Packaging size: 40*40*10㎝
Product packaging: Neutral Package
car series: American
car type: For Buick LaCrosse
As the core of the Buick LaCrosse 2.4L engine’s timing system, the kit’s components work together to maintain precise synchronization:
·Timing Chain: Connects the crankshaft and camshaft, maintaining a 1:2 rotation ratio (essential for four-stroke engines). It ensures the intake/exhaust valves open and close at the exact moment corresponding to piston movements (intake → compression → power → exhaust strokes), preventing "timing misalignment"—a catastrophic issue that can cause valve-piston collision, bent valves, or even engine seizure.
·Tensioner: Automatically adjusts chain tightness in real time. When the chain stretches slightly due to wear, the tensioner uses oil pressure (or mechanical spring force) to push the guide, compensating for slack and avoiding tooth skipping or chain rattle.
Guides: Fix the chain’s running path, preventing lateral deviation during high-speed rotation. This stabilizes engagement between the chain and camshaft/crankshaft sprockets, reducing abnormal wear and noise.
2. Water Pump: Maintains Engine Cooling System Circulation
The water pump is a key component of the LaCrosse 2.4L engine’s cooling system, responsible for regulating engine temperature:
·Coolant Circulation: Driven by the engine’s crankshaft (via a belt or pulley), the water pump’s impeller rotates to draw low-temperature coolant from the radiator, push it through the engine block’s water jackets (surrounding cylinders and combustion chambers), and absorb heat generated by fuel combustion. The heated coolant then flows back to the radiator for cooling—ensuring the engine operates at the optimal temperature (90-105℃).
·Prevents Overheating: By maintaining stable coolant flow, the water pump avoids engine overheating (a common cause of cylinder head warping, piston ring damage, or oil breakdown). For the Buick LaCrosse 2.4L (especially in high-temperature environments or during long-distance driving), this is critical for reliable performance.
3. Gasket (12621505): Seals Coolant & Prevents Leakage
·Sealing Function: Installed between the water pump and engine block, the gasket fills micro-gaps between the two metal surfaces (caused by machining tolerances). It prevents coolant from leaking out of the cooling system, ensuring no loss of cooling efficiency and avoiding coolant seepage that could damage nearby components (e.g., corroding the timing chain or electrical sensors).
·Pressure Maintenance: The cooling system operates under slight pressure (100-150 kPa) to raise coolant boiling point. The gasket’s high-pressure resistance ensures it does not deform or fail under this pressure, maintaining the system’s sealing integrity.
·Model-Specific Fit: Exclusively engineered for the Buick LaCrosse 2.4L engine (common in 2010-2016 model years, e.g., LaCrosse 2.4L SIDI). The timing chain kit, water pump, and gasket all match the engine’s structural layout—avoiding issues like mismatched mounting holes (water pump) or incorrect chain pitch (timing system) that occur with universal parts.
·OE Part Alignment: The gasket strictly conforms to GM original part specifications (12621505), ensuring a tight seal with the engine block and water pump; the timing chain kit (ASBG-BKJY2.4-16) follows Buick’s 2.4L engine timing parameters, with chain length, sprocket engagement depth, and tensioner stroke all calibrated to OE standards. It can directly replace old components without modifications.
·Integrated Kit Convenience: Combines two critical maintenance systems (timing + cooling) into one set. For repair shops or owners, this eliminates the hassle of sourcing separate parts (e.g., searching for a compatible water pump after buying a timing chain kit) and avoids mismatches between components—saving 30-40% of procurement time.
2. Durable Materials for Long-Term Reliability
·Timing Chain Kit (ASBG-BKJY2.4-16):
Chain: Made of chrome-molybdenum alloy steel with double heat treatment (carburizing + tempering), tensile strength ≥ 1,200 MPa, and wear resistance improved by 25% compared to standard chains. It resists stretching even under the 2.4L engine’s long-term high-speed (up to 6,200 rpm) operation.
·Tensioner & Guides: Tensioner housing uses reinforced PA66+GF30 engineering plastic (30% glass fiber content) to withstand engine compartment temperatures up to 220℃ without cracking; guides feature a low-friction PTFE coating, reducing chain friction by 20% and extending guide life to 180,000 ··km.
·Water Pump:
Impeller: Die-cast from high-purity aluminum alloy (ADC12) with precision machining, ensuring smooth water flow and no cavitation (air bubble formation) during operation—critical for stable cooling.
Seal: Adopts a double-lip fluororubber seal (FKM), which resists high-temperature coolant (up to 130℃) and anti-freeze corrosion, avoiding coolant leakage (a common failure point of low-quality water pumps).
·Gasket (12621505): Made of nitrile rubber (NBR) with metal core reinforcement, combining flexibility (for tight sealing) and rigidity (to prevent deformation under bolt pressure). It maintains a reliable seal for over 100,000 km, avoiding coolant seepage between the water pump and engine block.
3. Cost-Effective & Maintenance-Friendly
·Wholesale-Level Value: As a integrated kit, it offers a lower total cost than buying three components separately—typically 25-35% cheaper than purchasing OE timing chain kit + OE water pump + OE gasket. It is ideal for bulk procurement by auto repair shops or budget-conscious LaCrosse owners.
·Reduced Maintenance Frequency: The kit’s components have a service life matching the Buick LaCrosse 2.4L engine’s design lifespan (180,000-200,000 km). This means no need for frequent replacements of timing parts or water pumps, lowering long-term vehicle ownership costs.
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