Description
Engineered by INA (a leading flagship brand of the Schaeffler Group), the INA Timing Belt Kit with Water Pump offers a comprehensive, OE-quality solution for a complete timing drive and cooling system overhaul. In modern internal combustion engines, the timing belt frequently drives the coolant water pump directly. Replacing the timing belt without renewing a worn water pump risks catastrophic engine failure if the pump bearing seizes or leaks coolant onto the belt. This all-in-one kit includes a high-tensile HNBR timing belt, an automatic tensioner assembly, precision idler pulleys, an OE-grade mechanical water pump (with gasket/O-rings), and high-strength mounting bolts. Designed to maintain millimetric valve timing accuracy while guaranteeing smooth, leak-free coolant circulation under extreme dynamic and thermal loads, this kit reduces maintenance overhead and provides complete peace of mind. It serves as an essential, top-tier replacement module for professional workshops, engine specialists, and global auto parts distributors.
Technical Parameters
| Category | Specifications & Technical Details |
| OE-Grade Water Pump Bearing & SiC Mechanical Seal | The water pump in the kit utilizes a high-precision bearing unit and silicon carbide (SiC) mechanical face seal, capable of withstanding coolant temperatures up to 120°C and the strong lateral tension from the timing belt. Prevents coolant from leaking externally or intruding into the bearing interior, avoiding water pump bearing seizure that could cause timing belt breakage. |
| High-Grade HNBR & Glass Fiber Cord Belt Construction | The timing belt utilizes an HNBR (hydrogenated nitrile butadiene rubber) compound, with high-tensile inorganic glass fiber cord embedded internally. This structure gives the belt extremely high tensile modulus and shear strength. Under extreme engine bay temperature differentials from -40°C to +140°C, it never undergoes thermoplastic elongation or cracking, completely eliminating tooth skipping or belt breakage risks. |
| Automatic Tensioner Force & Dynamic Damping | The timing belt tensioner incorporates a high-precision pre-loaded torsion spring or hydraulic damping mechanism, automatically adjusting tension in real time according to engine bay temperature changes and slight belt elongation. It keeps the timing belt within the OEM-specified precise tension range, preventing premature wear and noise of the water pump and tensioner bearings from over-tightening, or timing misalignment from under-tightening. |
| Precision Formed Tooth Profile & Wear-Resistant Fabric Coating | The belt tooth surface is covered with a wear-resistant polyamide (Nylon) fabric layer, perfectly meshing with the camshaft, crankshaft, and water pump timing gear tooth grooves. Precision tolerance control reduces meshing impact and friction resistance during high-speed operation, significantly reducing operating noise and preventing belt tooth root tearing. |
| High-Purity Bearing Steel Idlers & Grade 10.9/12.9 Hardware | The idler pulleys in the kit are manufactured from high-purity GCr15 bearing steel, equipped with double-lip high dust-proof seals. The kit includes high-strength grade (e.g., 10.9 or 12.9) replacement bolts and sealing washers, ensuring technicians can achieve OEM-specified bolt torque and angle tightening requirements in a single installation. |
Applicable Car Brands & Models
On most timing belt-driven engines, the water pump is powered directly by the timing belt and shares the exact same labor path for replacement. If an old water pump leaks coolant onto a new timing belt, the chemical reaction will rapidly degrade the belt rubber, leading to catastrophic belt failure. Furthermore, if the water pump bearing fails later, you would have to pay the full labor cost all over again to disassemble the timing system.
Common warning signs include:
Coolant Leaks / Low Coolant Level: Visible coolant pooling near the lower timing cover or weeping from the water pump telltale hole.
Squealing or Whining Noise: Metallic whining or grinding noises coming from the timing cover due to worn water pump or tensioner bearings.
Engine Rough Idle or Misfires: Skipped teeth on a slack timing belt cause inaccurate valve synchronization, leading to loss of power and rough idling.
Engine Overheating: Impeller failure on a worn water pump stops coolant circulation, leading to sudden high engine temperatures.
Service intervals depend on vehicle manufacturer guidelines, typically ranging between 60,000 to 100,000 miles (approx. 90,000 to 160,000 km) or every 5 to 7 years, whichever occurs first. Vehicles operated under heavy traffic, hot climates, or severe service conditions should be inspected sooner.
INA Timing Belt Kits with Water Pump are packaged in authentic Schaeffler INA branded protective cartons. The water pump is sealed with protective caps, the belt is securely wrapped, and all required gaskets and bolts are safely compartmentalized. Minimum Order Quantities (MOQ) for international trade buyers start at 5 to 10 kits per part number, with flexible shipping options available for consolidated distributor orders.
