Technical Data - ISUZU 4JA1
Manufacturer ISUZU
4JA1 - I - OHV
| Engine Type | 4JA1 |
| Fuel Supply System | I |
| Note | OHV |
| Cc | 2499 |
| Number of Cylinders | 4 |
| Bore Ø | 93.00 |
| Stroke | 92.00 |
| KW | 56 |
| Compression | 18.4 |
| KBA No. (Germany) | 4114371 |
| Type Mines | 905A3C |
| Technical Information Number | Technical Data | Information |
|---|---|---|
| Compression-------------- | ||
| ····Compression - Ratio | ||
| ····Compression - Pressure [bar] | ||
| ····Cylinder - Differential pressure | ||
| Refs------ | ||
| ····Idle, min. | ||
| ····Idle, Max. | ||
| ····RPM, Max. | ||
| Exhaust Gas, value------- | ||
| Thermostat | ||
| ····Thermostat, Opening Temperature | ||
| injection pump----------- | ||
| ··Injection - Stage 1 => x | ||
| ····Injection (Point - ° before TDC) | ||
| ··Pressure, Fuel injection | ||
| Pressure, Radiator Cap--- | ||
| =<>= | ||
| General Information - Cylinder Head ------------------------- | ||
| ··Cylinder Head - Number | ||
| ··Cylinder Head - Height | ||
| ····New Part | ||
| ····Min. | ||
| ··warpage (value) - Cylinder Head | ||
| ····Measurement Range (Max.) - Machined | ||
| ··Thickness, Gasket | ||
| ····Standard Size | ||
| ····1st Oversize | ||
| ····2nd Oversize | ||
| ··Cylinder Head Gasket, Markings | ||
| ····Standard Size | ||
| ····1st Oversize | ||
| ····2nd Oversize | ||
| ··Piston Crown Clearance -/+ | ||
| ····Standard Size | ||
| ····1st Oversize | ||
| ····2nd Oversize | ||
| Pre-chamber-------------- | ||
| ··Protrusion -/+, Pre-combustion chamber | ||
| Valves---- | ||
| ··Valve Clearance [mm] | ||
| ····Operating Mode / Cold Check | ||
| ····Inlet | ||
| ····Exhaust | ||
| ··Valve Head Diameter [D] | ||
| ····Inlet | ||
| ····Exhaust | ||
| ··Valves - Length (L) | ||
| ····Inlet - New Part | ||
| ····Exhaust - New Part | ||
| ··Valve stem diameter [d] - Inlet | ||
| ····Standard Size | ||
| ····Wear limitation | ||
| ··Valve stem diameter [d] - Exhaust | ||
| ····Standard Size | ||
| ··Valve Disc, Thickness (t) | ||
| ····Inlet | ||
| ····Wear limitation - Inlet | ||
| ····Exhaust | ||
| ····Wear limitation - Outlet | ||
| ··Valve - Protrusion (+/-) | ||
| ····Inlet | ||
| ····Exhaust | ||
| Valve Spring------------- | ||
| ··Fitting Position | ||
| ··Tolerance - Vertical (s) | ||
| ··Valve Spring - Length (Load/Empty) | ||
| ····Inlet - inner | ||
| ····Exhaust - inner | ||
| ····Inlet - Outer | ||
| ····Exhaust - Outer | ||
| ··Diameter - Spring, Material | ||
| ····Inlet - inner | ||
| ····Exhaust - inner | ||
| ····Inlet - Outer | ||
| ····Exhaust - Outer | ||
| ··Capacitive Load => Length 1 [mm] | ||
| ····Inner | ||
| ····Outer | ||
| Valve Guides------------- | ||
| ··Fitted Height | ||
| ··Clearance - Valve => Valve Guides | ||
| ····Inlet | ||
| ····Wear limitation - Inlet | ||
| ····Exhaust | ||
| ····Wear limitation - Outlet | ||
| Valve seat | ||
| ··Valve Seat Angle (B) | ||
| ····Inlet | ||
| ····Exhaust | ||
| ··Adaptation - Angle (B1) | ||
| ····Inlet | ||
| ····Exhaust | ||
| ··Adaptation - Angle (B2) | ||
| ····Inlet | ||
| ····Exhaust | ||
| ··Valve Seat - Measurement (A) | ||
| ····Inlet | ||
| ····Wear limitation - Inlet | ||
| ····Exhaust | ||
| ····Wear limitation - Outlet | ||
| Valve Actuation--------- | ||
| ··Diameter - Rocker arm shaft | ||
| ··Bore - Holder, Rocker Bush (Rocker) | ||
| ··Clearance, Radial - Rocker | ||
| Valve Lifter------------- | ||
| ··Diameter - Valve Lifter | ||
| ····Standard Size | ||
| ··Clearance, Radial - Valve Lifter | ||
| Camshaft-- | ||
| ··Bore - Holder, Camshaft Bushes (Standard Size) | ||
| ··Diameter, Bearing Journal - Camshaft (Standard Size) | ||
| ··Clearance, Radial - Camshaft Bushes | ||
| ··Clearance, Axial - Camshaft Bushes | ||
| ··Centering - Camshaft (Tolerance) | ||
| ··Cam Lobe Height (Total) | ||
| ····Inlet | ||
| ····Exhaust | ||
| =<>= | ||
| General Information - Engine Block | ||
| ··Engine Block - Height | ||
| ····New Part | ||
| ··Bore - Holder, Main Bearings (Engine Block) | ||
| ··Press-fitted, Cylinder Sleeve | ||
| ··Cylinder Sleeve Protrusion | ||
| ····Height - Cylinder Sleeve (different) | ||
| Cylinder Sleeve---------- | ||
| Cylinder Sleeve---------- | ||
| ··Bore | ||
| ··Bore | ||
| ····Standard Size | ||
| ····Wear limitation | ||
| ··Inner Diameter - Cylinder Sleeve | ||
| ····Standard Size | ||
| ····Wear limitation | ||
| Piston---- | ||
| ··Piston Crown Clearance -/+ | ||
| ··Clearance - Piston | ||
| Gudgeon Pin-------------- | ||
| ··Diameter - Gudgeon Pin | ||
| ··Diameter - Gudgeon Pin (Eye) | ||
| ··Clearance, Radial - Gudgeon Pin | ||
| ····Clearance, Radial - Piston Rod / Piston | ||
| ····Wear limitation | ||
| Piston Ring Set---------- | ||
| ··Piston Ring, Groove | ||
| ··1st Piston Ring, Lock - Clearance (Compression) | ||
| ····Wear limitation | ||
| ··2nd Piston Ring, Lock - Clearance (Compression) | ||
| ····Wear limitation | ||
| ··Piston Ring, Lock - Clearance (Oil Trap) | ||
| ····Wear limitation | ||
| ··1st Piston Ring, Height - Clearance (Compression) | ||
| ····Wear limitation | ||
| ··2nd Piston Ring, Height - Clearance (Compression) | ||
| ····Wear limitation | ||
| ··Piston Ring, Height - Clearance (Oil Trap) | ||
| ····Wear limitation | ||
| Connecting Rod----------- | ||
| ··Clearance, Radial - Big End Bearing | ||
| ··Clearance, Radial - Big End Bearing | ||
| ··Clearance, Axial - Big End Bearing | ||
| ··Diameter, Bearing Journal - Connecting Rod | ||
| ····Standard Size | ||
| ··Bearing Journal, Connecting Rod - Tolerance (Oval) | ||
| ····Bearing Journal, Connecting Rod - Oval (Max.) | ||
| Crankshaft | ||
| ··Number of bearings | ||
| ··Centering - Crankshaft (Tolerance) | ||
| ··Diameter, Bearing Journal - Crankshaft (Standard Size) | ||
| ··Bearing Journal, Crankshaft - Oval (Max.) | ||
| ··Clearance - Main Bearing, crankshaft | ||
| ····Wear limitation - Bearing 5 | ||
| ··Bearing clearance - Axial Bearing | ||
| Cooling System----------- | ||
| ··Type | ||
| ··Clearance, Axial - Gear wheels => Oil Pump Housing Lid | ||
| ··Clearance - Rotor, Axle => Housing, Pump | ||
| ··Clearance - Drive gear => Housing, Pump | ||
| ··Clearance - Driven Gear wheel => Housing, Pump | ||
| =<>= | ||
| Engine Timing Control | ||
| Valve Cover-------------- | ||
| Cylinder Head Bolts------ | ||
| ····Stage 1 | ||
| ····Stage 2 | ||
| ····Retouching | ||
| Main Bearing Cap, crankshaft -------------------------------- | ||
| Bearing Cap, connecting rod | ||
| Crankshaft | ||
| Crankshaft Gear---------- | ||
| Flywheel-- | ||
| Camshaft-- | ||
| ··Adjusting Screw, valve clearance, Lock Screw | ||
| Rocker Arm Shaft, valve train ------------------------------- | ||
| ··Rocker Arm Bridge | ||
| Drive gear - Camshaft---- | ||
| Timing Case-------------- | ||
| ··Timing Belt Cover | ||
| ··Timing Belt Tensioner | ||
| Alternator | ||
| Glow Plug- | ||
| Starter--- | ||
| Water Pump | ||
| ····Water Pump Pulley | ||
| injection pump----------- | ||
| ··Injection Pipe | ||
| Injector Nozzle---------- | ||
| ····Injector Holder | ||
| Oil Pump-- | ||
| Oil Pan--- | ||
| ··Oil Drain Plug, oil pan | ||
| Exhaust Manifold--------- | ||
| Intake Manifold---------- |
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