AMC 232 & 258 Inline 6 Cylinder Engine
The AMC 232 & 258 inline 6-cylinder engines are renowned for their durability, reliability, and power. These engines were used in a wide variety of vehicles, including Jeep CJs and Wranglers, AMC Hornets and Eagles, and even International Harvester Scouts.
The 232 engine was first introduced in 1964, and the 258 engine was introduced in 1971. Both engines share a similar design, with a cast-iron block and head, a forged-steel crankshaft, and hydraulic valve lifters. The 232 engine has a displacement of 232 cubic inches (3.8 liters), while the 258 engine has a displacement of 258 cubic inches (4.2 liters).
Both engines produce good power and torque, making them ideal for use in Jeeps and other off-road vehicles. The 232 engine produces 145 horsepower at 4,000 rpm and 220 lb-ft of torque at 2,400 rpm. The 258 engine produces 150 horsepower at 4,000 rpm and 245 lb-ft of torque at 2,000 rpm.
Both engines are also relatively fuel-efficient, with the 232 engine getting up to 18 mpg in city driving and 24 mpg on the highway. The 258 engine gets up to 17 mpg in city driving and 23 mpg on the highway.
The AMC 232 & 258 inline 6-cylinder engines are excellent choices for those looking for a durable, reliable, and powerful engine for their Jeep or other off-road vehicle. These engines are easy to maintain and repair, and they can provide many years of trouble-free service.
Technical Specifications
Engine Type: Inline 6-cylinder
Displacement: 232 cubic inches (3.8 liters) or 258 cubic inches (4.2 liters)
Bore: 3.75 inches (95.25 mm) or 4.00 inches (101.6 mm)
Stroke: 3.44 inches (87.38 mm)
Compression Ratio: 8.5:1 or 9.0:1
Horsepower: 145 horsepower at 4,000 rpm (232 engine) or 150 horsepower at 4,000 rpm (258 engine)
Torque: 220 lb-ft at 2,400 rpm (232 engine) or 245 lb-ft at 2,000 rpm (258 engine)
Fuel System: Single-barrel carburetor or fuel injection
Ignition System: Point-type distributor or electronic ignition
Cooling System: Water-cooled with a radiator and water pump
Lubrication System: Pressure-lubricated with a full-flow oil filter
Weight: Approximately 500 pounds (227 kg)
This AMC Service Manual is the most comprehensive workshop manual available, fully bookmarked for easy navigation. You are purchasing a PDF download.
With easy, step by step instructions, this manual is Suitable for the home workshop mechanic or professional technician to help you maintain, repair or restore your AMC.
Below is a detailed list of topics covered in the AMC Service Manual:
Engine Assembly
Lubrication System
Positive Crankcase Ventilation
Cylinder Head Cover and Gasket
Rocker Arm Assembly
Valve Spring - Valve Stem Oil Seal
Intake and Exhaust Manifolds
Cylinder Head and Gasket
Cylinder Head Recondiitoning
Hydraulic Valve Tappets
Vibration Damper
Timing Chain Cover
Timing Chain
Camshaft and Bearings
Oil Pan
Oil Pump
Rear Main Bearing Oil Seal
Connecting Rod Bearings
Connecting Road and Piston Assemblies
Crankshaft Main Bearings
Crankshaft
Short Engine Assembly
Flywheel and Starter Ring Gear Assembly
Specifications
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