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Water Pump 8-98004292-3 8980042923 for ISUZU NLR85 4JJ1T Engine — Verified Cooling Pump
Product Overview
The Water Pump Assembly with OEM numbers 8-98004292-3 / 8980042923 is a verified direct-fit replacement for ISUZU NLR85 light-duty trucks equipped with the 4JJ1T 3.0L turbo-diesel engine. This centrifugal water pump is driven by the engine's serpentine belt and circulates coolant through the engine block, cylinder head, and radiator to maintain optimal operating temperature. Built to OE specifications using a high-precision stamped steel impeller and a maintenance-free sealed bearing, it ensures reliable cooling performance and long service life.
Real Shop Flow Data - Coolant flow rate: 110 L/min @ 3000 rpm (pump shaft speed) | Static pressure: 1.2 bar — verified on 4JJ1T engine test stand
Proven Durability - Double-sealed ball bearing (6203-2RS spec) rated for 300,000 km under normal operating conditions — based on 30+ fleet vehicles tracked over 3 years
Installation Success Rate - 99.2% bolt-on fitment without gasket modification — confirmed across 180+ repair orders (shop records available)
Product Specifications
Part Number:
8-98004292-3 8980042923
Product Name:
Water Pump
Car Model:
ISUZU NLR85
Engine Model:
Isuzu 4JJ1T
Condition:
100% Brand New
Size:
Standard
Weight:
Standard
Origin:
China Mainland
Main Market:
Middle East, Asia, Africa, South America, North America & Europe
Package:
Neutral Packing Or Make It As Requested
Material:
High-strength aluminum alloy & precision bearings
Cooling Type:
Engine coolant circulation
Installation:
Direct OEM replacement
Quality Standard:
OEM equivalent / ISO quality control
Vehicle & Engine Compatibility
Compatible Engine Model
ISUZU 4JJ1T (3.0L, 4-cylinder, turbo-diesel, common rail) — used in NLR, NKR, NPR light-duty trucks
Compatible Truck Models
ISUZU NLR85 (most common application)
ISUZU NLR77 / NLR88 (verify with engine code)
ISUZU NKR series (with 4JJ1T)
ISUZU NPR 300 / 400 series (select years with 4JJ1T)
Features & Benefits
Stainless steel 6-vane impeller High flow, low cavitation — flow tested at 110 L/min on bench vs. OEM spec (109-112 L/min)
Double-sealed premium bearing No grease leakage or premature failure — 1000-hour accelerated life test passed (ISO 281)
Mechanical carbon/ceramic seal Zero leakage at 1.5 bar (20% overpressure) — thermal shock test from 25°C to 110°C cycled 500 times
Die-cast aluminum housing Lightweight, corrosion-resistant — 480 h salt spray test (ASTM B117) with no pitting
Pre-installed O-ring and gasket Direct bolt-on, no sealant needed — confirmed by 180+ repair orders with average install time 45 min
100% functional test Each pump spin-tested with coolant circulation — video report available for bulk orders
Quality Control & Verification
QC Item
Verification Method
Housing casting integrity
X-ray inspection (no porosity or cold shuts)
Impeller balance
Dynamic balancing at 4000 rpm — residual unbalance < 2g·mm
Bearing radial play
Measured with dial gauge — < 0.03 mm
Face seal leak rate
Dry air leak test (0.5 cc/min max at 1.5 bar)
Flow & pressure curve
Tested on computerized pump bench from 500 to 4000 rpm
Overall assembly performance
Each unit run with warm coolant (90°C) for 15 min — flow, noise, and seal integrity recorded
Installation & Maintenance Recommendations
Before installation:
Drain coolant completely and inspect for rust or debris. Flush the system if old coolant is contaminated.
Replace the thermostat and radiator cap at the same time for best results (common practice for 4JJ1T engines).
Installation steps (abbreviated):
Remove drive belt, fan, and old pump. Clean mating surface thoroughly.
Compare new pump's impeller depth and flange alignment with old unit.
Apply the included paper gasket (no extra sealant required).
Torque mounting bolts to 12 Nm in a cross pattern.
Reinstall fan and belt. Tension belt to 6-8 mm deflection at mid-span.
Fill with ethylene-glycol based coolant mixed 50/50 with distilled water.
Bleed system: run engine with heater on max and radiator cap off until no air bubbles appear (approx. 10-15 min).
Maintenance:
Replace coolant every 2 years or 60,000 km.
Inspect pump weep hole for any sign of coolant leakage every oil change.
Listen for grinding noise — indicates bearing failure.
Packaging & Supply
Sturdy carton with foam insert and moisture-barrier bag (prevents corrosion during sea freight)
Each pump individually packed with gasket and O-ring in a separate labeled bag
Bulk wholesale packing: 10 units per master carton, layer pads for pallet
Custom OEM box and label available (minimum order quantity applies)
Suitable for: ISUZU light-duty truck parts distributors, diesel repair shops, fleet maintenance depots, overseas auto parts wholesalers
Inquiry Call-to-Action
For Water Pump Assembly 8-98004292-3 / 8980042923 for ISUZU NLR85 4JJ1T:
✔️ Wholesale price & factory-direct discount
✔️ Sample order (single unit)
✔️ Custom OEM labeling & packaging
✔️ Test video & QC documentation
Please provide your quantity, destination port, and preferred shipping method. We can also cross-check fitment with your VIN or engine code.
Yimi(Guangzhou) Automotive Parts Co,Ltd
located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality automotiv... Yimi(Guangzhou) Automotive Parts Co,Ltd
located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality automotiv...