Water Pump for Isuzu KB250D, KB280DT, Trooper & More – 8 Hole Flange (WA005)

Vehicle Fitment & Part Details

The WA005 water pump (OE ref. 8-94376-844-0) is a direct replacement for Isuzu KB250D, KB280DT, Trooper and Frontier models fitted with 4JA1, 4JA1-L and 4JB1T diesel engines. Also fits Foton Thunda 2.8D and GWM Steed 2.8D. This is the 8-hole flange variant. Supplied with gaskets and seals. The water pump circulates coolant through the engine cooling system. Always confirm the OE number against your vehicle before ordering.

Key Details

SKU

WA005

Component

Water Pump (8-hole flange)

Brand

Partquip

Primary Fitment

Isuzu KB250D / KB280DT

Included

Gaskets and seals

Key Benefits

• Direct OE-equivalent replacement for the Isuzu 4JA1 and 4JB1T diesel engine cooling circuit
• 8-hole flange design — confirm your pump housing has 8 bolt holes before ordering
• Supplied with gaskets and seals for a complete installation

Product Specifications

OEM Reference Numbers

• Isuzu: 1K00-15-100, 21010-89TA1, 21010-89TA5, 21010-89TB0, 8-94140-341-1, 8-94140-341-2, 8-94310-025-0, 8-94310-251-0, 8-94376-472-0, 8-94376-844-0, 8-94376-851-0, 8-94379-461-2

Vehicle Fitment

Fitment Notes

• Always verify the OE part number stamped on your existing water pump before ordering. Fitment data is provided as a guide and may not cover every sub-variant.
• This is the 8-hole flange variant. Some Isuzu engines use a 6-hole flange water pump — count the bolt holes on your existing pump housing to confirm.

Installation / Use / Maintenance Tips

• Drain the cooling system completely before removing the old water pump to minimise coolant loss and contamination.
• Clean all gasket mating surfaces thoroughly and use the supplied gaskets and seals — do not reuse old gaskets.
• Inspect the thermostat, radiator hoses and drive belt while the pump is accessible; replace any worn components at the same time.
• Refill with the manufacturer-recommended coolant type and concentration, and bleed all air from the system before starting the engine.
• Run the engine to operating temperature and check for leaks around the pump housing, hose connections and bleed points.

Common Questions

Will this water pump fit my vehicle?

Check the fitment table above and confirm the OE reference number matches the one on your current water pump. If your vehicle and engine code appear in the table and the OE number matches, this pump is a direct fit. Also verify that your pump housing has 8 bolt holes.

What do the OEM reference numbers mean?

OEM (Original Equipment Manufacturer) reference numbers are the part numbers assigned by the vehicle manufacturer. They let you cross-reference this aftermarket part against the original to confirm compatibility.

What is included in the box?

This water pump is supplied with gaskets and seals required for installation.

Is Partquip the same as MAP Pro?

No. Partquip is an independent aftermarket brand. MAP Pro is the house brand of Modern Auto Parts. Both are available in our store, but they are separate brands with their own product lines.

Are there other variants of this water pump?

This listing covers SKU WA005 (8-hole flange). Other water pump SKUs in our range may suit different engines, flange types or vehicle models — search “water pump” in our store or contact us for assistance.