PUMP ASSY-COOLENT | Hyundai / KIA Parts 25100-2B700

Product Overview

The 25100-2B700 Engine Water Pump, officially identified as Pump Assembly–Coolant, is a mechanically driven component installed in the engine cooling system. It circulates coolant between the engine block, cylinder head and radiator, helping the engine maintain a stable operating temperature under different driving conditions.

Designed as a vehicle-specific replacement, it uses the original mounting position and connection layout for selected Hyundai and Kia Gamma gasoline engines. The Hyundai parts catalogue identifies it as a direct-replacement coolant pump for compatible vehicles. 

Basic Product Information

Exact weight and accessory configuration may vary slightly by production batch.

Product Features

• Cast-aluminum housing for strength, reduced weight and corrosion resistance

• Six-vane metal impeller designed to maintain consistent coolant circulation

• Precision bearing and shaft assembly for smooth, low-noise operation

• Mechanical sealing structure designed to reduce coolant leakage

• OE-style mounting points for straightforward installation

• Stable circulation performance at different engine speeds

• Suitable for MPI, GDI and T-GDI Gamma gasoline engines

• New gasket or sealing ring available according to the confirmed order configuration

• Individually inspected before packing and shipment

Core Cooling-System Function

The pump is driven by the engine accessory belt. As the impeller rotates, it moves coolant through the engine water jackets and toward the radiator. Heat absorbed from the engine is transferred to the radiator, where the coolant temperature is reduced before it returns to the engine.

A properly functioning pump helps:

• Maintain a stable engine operating temperature

• Prevent localized heat buildup inside the cylinder head and engine block

• Support radiator heat dissipation

• Maintain coolant flow during acceleration and extended driving

• Improve cabin-heater performance in cold conditions

• Protect the cylinder-head gasket, thermostat and other cooling components from excessive heat

Vehicle Problems It May Help Resolve

Replacing a worn or leaking pump may correct the following problems when the pump itself is confirmed as the cause:

• Coolant leaking from the pump housing, seal or drain hole

• Engine temperature rising above the normal range

• Unstable coolant temperature during driving

• Grinding, rattling or whining noises near the pump bearing

• Excessive play at the water-pump shaft or pulley

• Weak coolant circulation

• Reduced cabin-heater performance

• Coolant stains or deposits around the pump mounting area

• Repeated coolant loss without an obvious hose or radiator leak

Overheating can also be caused by the thermostat, radiator, cooling fan, cylinder-head gasket or trapped air. The complete cooling system should therefore be inspected before replacing the pump.

Materials and Surface Finish

Housing

The housing is produced from cast aluminum, providing a suitable balance of mechanical strength, low weight, heat resistance and corrosion resistance. The mounting and sealing surfaces are precision-machined to support accurate alignment with the engine.

Impeller

The common aftermarket configuration uses a six-vane metal or steel impeller. Its curved-vane design helps move coolant continuously while limiting unnecessary turbulence inside the pump chamber.

Shaft and Bearing

The internal shaft and bearing assembly uses hardened steel components designed to withstand rotational loads from the accessory belt. Accurate bearing alignment helps reduce vibration and abnormal operating noise.

Sealing Components

The shaft area uses a mechanical sealing structure, while the mounting interface uses an automotive-grade gasket or sealing ring. The exact elastomer compound may vary by production batch and should be confirmed if a specific material specification is required.

Surface Treatment

The main housing retains a natural silver cast-aluminum finish. Critical mounting, sealing and shaft-contact surfaces are machined for dimensional accuracy. Surface-treatment details can be customized or confirmed according to the buyer’s quality standard.

Structural Design

The pump combines the housing, bearing, shaft, impeller and mechanical seal in a compact assembly. Its vehicle-specific flange and bolt pattern allow it to align with the original engine mounting points.

The six-vane impeller is designed to provide balanced coolant distribution across its operating range. The internal seal separates the coolant chamber from the bearing area, helping prevent coolant from reaching the lubricated bearing. A drain or inspection opening can provide an early indication of internal seal wear.

Quality and Performance

The product is manufactured to match the mounting position and functional dimensions of the corresponding OE application. Quality-control procedures may include:

• Housing inspection for casting defects

• Mounting-hole and flange-position measurement

• Shaft rotational-resistance inspection

• Bearing noise and movement inspection

• Impeller balance and clearance inspection

• Seal and leakage inspection

• Visual inspection before packing

• Sample fitment verification for initial orders

The metal impeller and cast-aluminum housing support dependable coolant flow and long-term operation. The sealing structure is designed to resist leakage under normal cooling-system temperature and pressure conditions.

Vehicle Compatibility

Main Hyundai Applications

Main Kia Applications

Common engine codes include G4FA, G4FC, G4FD, G4FG and G4FJ. 

Vehicle year alone is not sufficient to confirm compatibility. Buyers should provide the VIN, original part number, engine code and vehicle production date before ordering.

Cross-Reference Numbers

• 25100-2B700

• 251002B700

• 25100-2B000

• 251002B000

• AW6247

• Blue Print ADG09181

• GRAF PA1136

• Quinton Hazell QCP3779

• Metelli 24-1136

• Valeo 526009

Some catalogues also associate 25221-2B000 with replacement listings, but 25221 is normally used as a coolant-pump pulley reference. It should not be treated as a guaranteed pump interchange without VIN and catalogue verification.

Installation Characteristics

This is a vehicle-specific, bolt-on replacement that uses the original installation position. Professional installation is recommended because the accessory belt, coolant and surrounding engine components must be removed or repositioned.

Installation difficulty is generally moderate and depends on the vehicle model and engine-bay layout.

Important installation precautions:

1. Allow the engine to cool completely before opening the cooling system.

2. Drain the coolant into a suitable container.

3. Inspect the belt, pulley, tensioner and hoses before installation.

4. Remove all residue from the engine mounting surface.

5. Do not damage or scratch the sealing surface.

6. Install a new gasket or sealing ring.

7. Tighten the mounting bolts gradually and evenly to the vehicle manufacturer’s specified torque.

8. Do not overtighten the bolts, as this may distort the aluminum housing.

9. Refill the system with the manufacturer-recommended coolant.

10. Bleed trapped air from the cooling system.

11. Check for leaks and verify stable engine temperature after installation.

Included Components

Standard supply configuration:

• 1 × Engine Water Pump

• 1 × Gasket or Sealing Ring, subject to confirmed order configuration

The pulley, mounting bolts, accessory belt, thermostat and coolant are normally not included unless specifically stated in the quotation. An aftermarket fitment listing confirms that comparable sets may include one pump and one sealing ring.

Packaging Specifications

Each unit is protected in an individual box to reduce impact, moisture exposure and surface damage during transportation.

Available packaging options:

• Neutral packaging

• Kingmay-branded packaging

• Customized private-label packaging

• Customer-supplied artwork and barcode labels

• Mixed-SKU carton packing

• Export-grade master cartons

The quantity per master carton, carton dimensions, gross weight and net weight depend on the selected packaging and order quantity. Final packing data will be confirmed on the quotation or packing list before shipment.

Wholesale and Customization Service

• Minimum order quantity: 10 pieces

• B2B wholesale supply

• Mixed-SKU orders available

• OEM and ODM cooperation supported

• Neutral and customized packaging available

• Sample confirmation available for initial orders

• Quantity discounts available for larger orders

• VIN and OE-number verification support before production

Warranty and After-Sales Service

This product is covered by a 24-month warranty under normal installation and operating conditions. If a confirmed manufacturing or material defect occurs during the warranty period, Kingmay will assist with replacement, return or other appropriate after-sales arrangements.

To process a warranty claim efficiently, please retain the purchase record, product label, installation information and clear photographs or videos showing the issue. Return and replacement procedures may vary according to the order terms, destination and product condition. Please contact us for complete warranty, return and replacement details.