Isuzu engine parts

Isuzu diesel engines are most commonly found in the 4JB1/493, 4JJ1 (3.0L), 4HK1 (5.2L), and 6HK1 (7.8L) models. They are known for their durability, strong low-end torque, fuel efficiency, and low maintenance costs, and are widely used in pickup trucks, light trucks, medium and heavy-duty trucks, and construction machinery. Below is a list of core components, models/part numbers, compatibility, and applications, covering mainstream Isuzu engines in Jiangxi and Qingling.

I. Overview of Mainstream Engine Models (Confirm Model First)

• 4JB1/493 (2.8L): Classic engine, N-series light truck, Ruimai/Lingtuo pickup, 95 hp / 200 N·m
• 4JJ1 (3.0L): D-MAX, mu-X, Yifang, 130 kW / 380 N·m, VGS turbo + common rail
• 4HK1 (5.2L): 700P light truck, FTR, 139 kW / 510 N·m, Denso common rail
• 6HK1 (7.8L): FVR/FVZ heavy truck, excavator, 177 kW / 720 N·m

II. Cylinder Block / Cylinder Head / Crankshaft / Piston (Basic Components)

1. Cylinder Block Assembly

• 4JB1: 8-94437-397-6, 5-87810-288-0
• 4JJ1: 8-98249-573-0, 8-97355-545-1
• 4HK1: 8-98180-687-0, 8-97603-431-0

2. Cylinder Head Assembly

• 4JB1: 8-97146-922-0, 8-94451-790-1
• 4JJ1: 8-98226-319-0, 8-97355-546-1
• 4HK1: 8-98181-424-0, 8-97603-432-0

3. Crankshaft / Crankshaft:

• 4JB1: 8-94455-740-0
• 4JJ1: 8-98017-467-0
• 4HK1: 8-98151-894-0
• Main Bearings / Connecting Rod Bearings:
• 4JB1: 8-94455-741-0 (Main Bearing), 8-94455-742-0 (Connecting Rod Bearing)
• 4JJ1: 8-98017-468-0, 8-98017-469-0

4. Pistons / Piston Rings / Cylinder Liner

• Piston Assembly:
• 4JB1: 8-94455-743-0
• 4JJ1: 8-98017-470-0
• Piston Rings:
• 4JB1: 8-94455-744-0
• 4JJ1: 8-98017-471-0
• Cylinder Liner (Wet):
• 4JB1: 5-87810-135-0
• 4HK1: 8-97603-433-0

5. Connecting Rod / Connecting Rod Bolts

• Connecting Rod Assembly:
• 4JB1: 8-94455-745-0
• 4JJ1: 8-98017-472-0
• Connecting Rod Bolts: 8-94455-775-0 (4JB1), 8-98017-500-0 (4JJ1), high strength, not reusable.

III. Valve Train (Valve / Timing / Tappets)

1. Valve Assembly

• Intake Valve / Exhaust Valve:
• 4JB1: 8-94395-882-2 (Intake), 8-94395-883-2 (Exhaust)
• 4JJ1: 8-97209-876-4 (Intake), 8-97209-877-4 (Exhaust)
• Valve Seals: 8-94455-750-0 (4JB1), 8-98017-475-0 (4JJ1)

2. Timing System (Gears / 4JB1 (Timing Gear):

• Crankshaft Timing Gear: 8-94455-751-0
• Camshaft Timing Gear: 8-94455-752-0
• 4JJ1/4HK1 (Timing Chain):
• Chain: 8-98017-476-0 (4JJ1)
• Tensioner: 8-98017-477-0 (4JJ1)
• Guide Plate: 8-98017-478-0 (4JJ1)

3. Camshaft / Hydraulic Tappet

• Camshaft:
• 4JB1: 8-94455-753-0
• 4JJ1: 8-98017-479-0
• Hydraulic Tappet: 8-94455-754-0 (4JB1), 8-98017-480-0 (4JJ1)

IV. Fuel System (Denso / Bosch Common Rail, Core Vulnerable Units)

1. High-Pressure Fuel Pump

• 4JB1 (Mechanical Pump): 8-94455-755-0, 101601-8670
• 4JJ1/4HK1 (Denso Common Rail): 8-98017-481-0 (4JJ1), 8-98180-689-0 (4HK1), 1800 bar

2. Injector Assembly (Crucial)

• 4JB1: KBAL-P028A, 8-94455-756-0
• 4JJ1: 8-98017-482-0, 095000-8310 (Denso)
• 4HK1: 8-98180-690-0, 095000-6790 (Denso)
• Injector Copper Gasket / Sealing rings: 8-94455-757-0 (4JB1), 8-98017-483-0 (4JJ1)

3. Diesel Filter / Oil-Water Separator

• Diesel Filter:
• 4JB1: 8-94455-758-0, 1-13240-230-0
• 4JJ1: 8-98017-484-0, 1-13240-231-0
• Oil-Water Separator: 8-94455-759-0 (4JB1), 8-98017-485-0 (4JJ1), with sensor for periodic water draining.

4. Glow Plug (Crucial for Cold Start)

• 4JB1: 8-94455-760-0, 1-87618-352-0
• 4JJ1: 8-98017-486-0, 1-87618-353-0

V. Intake/Boosting System (Turbocharger + Intercooler)

1. Turbocharger (Garrett/Ishikawajima)

• 4JB1: 702422-5001, 8-94455-761-0
• 4JJ1 (VGS Variable Geometry): 8-98017-487-0, 787518-5001
• 4HK1: 8-98180-691-0, 758121-5001

Isuzu 4JJ1 Turbocharger

2. Intercooler / Intake Manifold

• Intercooler: 8-94455-762-0 (4JB1), 8-98017-488-0 (4JJ1)
• Intake Hose: 8-94455-763-0 (4JB1), 8-98017-489-0 (4JJ1)

3. Air Filter / Flow Meter

• Air Filter: 8-94455-764-0 (4JB1), 8-98017-490-0 (4JJ1)
• Air Flow Meter (MAF): 8-94455-765-0 (4JB1), 8-98017-491-0 (4JJ1)

VI. Lubrication System (Oil Circuit, Commonly Used and Easily Worn)

1. Oil Pump / Oil pan

• Oil pump:
• 4JB1: 8-94455-766-0
• 4JJ1: 8-98017-492-0
• Oil pan: 8-94455-767-0 (4JB1), 8-98017-493-0 (4JJ1)

2. Oil filter (most commonly used)

• 4JB1/4JJ1/4HK1 universal: 8-94455-768-0, 5-87810-289-0, M20 thread, φ70 seal

3. Oil pressure sensor / Radiator

• Oil pressure sensor: 8-94455-769-0 (4JB1), 8-98017-494-0 (4JJ1)
• Oil cooler: 8-94455-770-0 (4JB1), 8-98017-495-0 (4JJ1)

VII. Cooling System (Water Pump / Thermostat / Fan)

1. Water Pump / Thermostat

• Water Pump:
• 4JB1: 8-94455-771-0
• 4JJ1: 8-98017-496-0
• Thermostat (82℃): 8-94455-772-0 (4JB1), 8-98017-497-0 (4JJ1)

2. Cooling Fan / Accessory Belts

• Mechanical Fan: 8-94455-773-0 (4JB1), 8-98017-498-0 (4JJ1)
• Accessory Belts / Tensioners:
• Belts: 8-94455-774-0 (4JB1), 8-98017-499-0 (4JJ1)
• Tensioners: 8-94455-775-0 (4JB1), 8-98017-500-0 (4JJ1)

VIII. Sensors / Electronic Control (National III/National IV) (China V/China VI emission standards)

• Crankshaft position sensor: 8-94455-776-0 (4JB1), 8-98017-501-0 (4JJ1)
• Camshaft position sensor: 8-94455-777-0 (4JB1), 8-98017-502-0 (4JJ1)
• Water temperature sensor: 8-94455-778-0 (4JB1), 8-98017-503-0 (4JJ1)
• Rail pressure sensor: 8-98017-504-0 (4JJ1/4HK1)
• Oxygen sensor (China VI emission standard): 8-98180-692-0 (4HK1)

IX. Seals / Overhaul kit

• Upper overhaul kit (cylinder head gasket + valve cover gasket + Intake and Exhaust Gaskets: 8-94455-779-0 (4JB1), 8-98017-505-0 (4JJ1)
• Lower Overhaul Kit (Oil Pan Gasket + Crankshaft Oil Seal + Side Cover Gasket): 8-94455-780-0 (4JB1), 8-98017-506-0 (4JJ1)
• Full Overhaul Kit: 8-94455-781-0 (4JB1), 8-98017-507-0 (4JJ1)