4JK1 Oil Pump – OEM-Quality Replacement for Isuzu 2.5L Diesel Engines
Upgrade your Isuzu engine with our premium 4JK1 oil pump, engineered to exact OEM specifications for reliable lubrication performance. Compatible with Isuzu D-Max, MU-X, and NPR light trucks equipped with the 2.5L 4JK1-TC diesel engine, this replacement oil pump restores proper oil pressure and prevents premature engine wear. Direct interchange with OEM part numbers 8981281340, 8982326241, and 8974363921.
Why Choose Our 4JK1 Diesel Oil Pump?
- Precision-Machined Rotors: Manufactured from high-grade alloy steel for consistent oil flow and pressure output (400–600 kPa operating range)
- Direct Bolt-On Fit: Identical mounting footprint and oil gallery alignment to the original Isuzu 4JK1 oil pump – no modifications required
- Hardened & Polished Surfaces: Reduces internal friction and extends service life under heavy-duty commercial use
- Pressure Relief Valve Included: Pre-assembled and calibrated to factory specifications for hassle-free installation
Common Symptoms of a Failing 4JK1 Oil Pump
Replace your oil pump immediately if you notice any of these warning signs:
- Low oil pressure warning light on dashboard
- Engine knocking or ticking noises at idle
- Increased oil consumption
- Overheating under load
- Metallic debris in engine oil
Installation Notes
Professional installation recommended. When replacing the 4JK1 engine oil pump, always prime the pump with clean engine oil before first startup. Pair with a new oil filter and fresh 15W-40 diesel engine oil for best results. Typical installation time: 2–3 hours.
FAQ (Frequently Asked Questions)
Q1: What is the OEM part number for a 4JK1 oil pump?
The primary OEM part numbers for the Isuzu 4JK1 oil pump are 8981281340 and 8982326241. Earlier versions may also cross-reference to 8974363921 or 9890537770. All our pumps are manufactured to match these original specifications exactly. Some regional engine variants may use 8973859850 or 8983208637
Q2: Is this oil pump compatible with all Isuzu 4JK1 engines?
A: It is designed for most Isuzu 4JK1 diesel engines. Please confirm your engine serial number or OEM part number before ordering.
Q3: Is this oil pump brand new?
A: Yes. Every oil pump is brand new and manufactured according to OEM replacement standards.
Q4: How is product quality ensured?
A: Each oil pump undergoes dimensional inspection, performance testing, and final quality inspection before shipment.
Q5: Can you supply other 4JK1 engine parts?
A: Yes. We also supply crankshafts, overhaul kits, gasket kits, pistons, piston rings, cylinder liners, bearings, connecting rods, cylinder heads, camshafts, water pumps, and other engine components.
Q6: Do you provide OEM and private label services?
A: Yes. We offer customized branding, OEM manufacturing, and private label packaging.
Q7: What warranty do you offer?
A: We provide a 6-month warranty against manufacturing defects under normal operating conditions.
Q8: Do you ship internationally?
A: Yes. We exports engine parts worldwide via sea freight, air freight, and express delivery.
Related Products
- Isuzu 4JK1 Engine Overhaul Kit
- Isuzu 4JK1 Full Gasket Kit
- Isuzu 4JK1 Crankshaft
- Isuzu 4JK1 Piston Kit
- Isuzu 4JK1 Cylinder Liner
- Isuzu 4JK1 Main Bearing
- Isuzu 4JK1 Connecting Rod Bearing
- Isuzu 4JK1 Water Pump
- Isuzu 4JK1 Cylinder Head
- Isuzu 4JK1 Camshaft
Keywords
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