Acura B18C5 Engine for Sale – Complete Buying and Compatibility Guide

If you are searching for an Acura B18C5 engine for sale, the B18C5 is a highly desirable option for Honda and Acura performance enthusiasts looking for a factory-built high-revving VTEC engine. Originally developed for the Acura Integra Type R, this 1.8-liter DOHC VTEC engine is known for its performance-oriented design, naturally aspirated configuration, and strong motorsport reputation.

Whether you are replacing an existing engine, restoring an Acura Integra Type R, or planning a performance-focused Honda engine swap, understanding the B18C5's specifications and compatibility requirements is essential before purchasing.

When shopping for a B18C5 engine, buyers should verify the engine code, condition, included components, vehicle compatibility, and installation requirements. Choosing the correct engine assembly can help avoid unnecessary modifications and additional installation expenses.

Specifications refer to the original US-market B18C5 application. Confirm the exact engine version and production-year details with the seller before purchasing.

1. Engine Configuration

The B18C5 features a 1.8-liter inline-four-cylinder engine configuration with a dual overhead camshaft (DOHC) cylinder head and Honda's Variable Valve Timing and Lift Electronic Control (VTEC) technology.

Its 16-valve design provides four valves per cylinder, supporting efficient airflow and high-RPM engine performance.

Key configuration details include:

• Inline-four-cylinder layout.

• DOHC 16-valve cylinder head.

• Honda VTEC technology.

• Aluminum-alloy engine block with cast-iron cylinder liners.

• Aluminum-alloy cylinder head.

• Belt-driven camshafts.

• Naturally aspirated engine design.

These characteristics make the B18C5 a popular choice for enthusiasts seeking an original Acura Integra Type R engine or a suitable B-series performance engine for a project vehicle.

2. Engine Displacement

The Acura B18C5 has a displacement of 1,797 cc (approximately 1.8 liters).

Its factory bore and stroke measurements are:

• Bore: 81 mm.

• Stroke: 87.2 mm.

• Compression ratio: 10.6:1.

The engine's displacement and compression configuration contribute to its high-revving performance characteristics.

When purchasing a B18C5 engine, confirm that the engine code and internal specifications match the original US-market Type R configuration. Other Honda B18 engines may have similar displacement but different internal components and performance specifications.

3. Fuel Type

The B18C5 is designed to operate on gasoline (petrol) and uses Honda's Programmed Fuel Injection (PGM-FI) system.

The original Acura specifications recommend premium unleaded gasoline with a minimum octane rating of 91.

Before installation, buyers should check the fuel injectors, fuel rail, fuel pressure regulator, fuel pump compatibility, and engine management system.

Using the correct fuel system components helps maintain proper engine operation and supports the original fuel-injection configuration.

4. Aspiration / Induction

The Acura B18C5 is a naturally aspirated engine, meaning it does not use a factory-installed turbocharger or supercharger.

Its original induction system features:

• Naturally aspirated air intake.

• Programmed Fuel Injection (PGM-FI).

• Single-port intake manifold.

• High-flow intake design.

• Performance-oriented cylinder head ports.

• Honda VTEC valve control technology.

The factory induction system was designed to support high-RPM power delivery without forced induction.

Buyers looking for an original B18C5 engine should verify whether the intake manifold, throttle body, injectors, and other induction components are included in the sale.

5. Power Output

The original US-market Acura B18C5 produces:

Factory-rated horsepower

195 HP

At 8,000 RPM

Engine redline
8,400 RPM

Fuel cutoff
8,500 RPM

VTEC switchover
5,700 RPM

These factory specifications demonstrate the engine's performance-focused design.

The B18C5 is particularly attractive to buyers who want a high-revving naturally aspirated Honda engine for a restoration, replacement, or performance-oriented build. Actual output from a used engine will depend on its mechanical condition, maintenance history, and modifications.

6. Torque

The factory-rated torque output of the US-market B18C5 is:

• Maximum torque: 130 lb-ft.

• Metric equivalent: Approximately 176 Nm.

• Factory-rated engine speed: 7,500 RPM.

Its torque characteristics complement its high-RPM horsepower delivery, making it suitable for drivers who appreciate naturally aspirated performance.

When purchasing a used B18C5 engine, consider requesting compression-test results, leak-down results where available, and evidence of proper lubrication and maintenance.

The original US-market Type R applications used the B18C5 engine. Buyers should distinguish this engine from other regional B18C variants, including the Japanese-market B18C Type R and European-market B18C6. Similar engine names do not automatically mean identical specifications or interchangeability.

Acura B18C5 Engine Compatibility and Fitment

If you are planning to purchase an Acura B18C5 engine, checking vehicle compatibility is an important step before completing your order.

The B18C5 was originally installed in the Acura Integra Type R. It can also be considered for certain Honda and Acura B-series engine-swap projects, depending on the vehicle's chassis and existing drivetrain configuration.

Potential swap applications include:

• Acura Integra DC2.

• Honda Integra DC2.

• Honda Civic EG.

• Honda Civic EK.

• Honda Civic hatchback B-series conversion projects.

• Other compatible Honda and Acura B-series platforms.

Important: These are potential swap applications, not guaranteed direct-fit replacements. Civic and other non-Type R installations may require compatible engine mounts, transmission, axles, wiring harnesses, ECU, cooling components, and exhaust modifications.

Important Fitment Considerations Before Buying

Engine mounts: Confirm that the engine mounting brackets and mounts match your vehicle's chassis and installation configuration.

Transmission compatibility: Check whether your existing transmission is compatible with the B18C5 engine. The transmission, clutch assembly, flywheel, and related components may need to be changed.

ECU and wiring: Verify that the ECU, engine harness, sensors, and VTEC wiring are compatible with the engine and vehicle electronics.

Fuel system: Ensure the fuel pump, injectors, fuel lines, and pressure requirements match the intended engine configuration.

Cooling system: Check radiator capacity, hoses, thermostat, and cooling fan compatibility.

Exhaust system: Confirm exhaust manifold clearance, downpipe fitment, and exhaust connections.

Vehicle generation: Always verify the exact chassis code, model year, and existing engine configuration before purchasing.

What to Check When Buying an Acura B18C5 Engine for Sale

Finding an Acura B18C5 engine for sale is only the first step. Buyers should also evaluate the engine's authenticity, mechanical condition, and included components.

Here are some important checks before placing an order.

1. Verify the engine code: Request clear photographs showing the stamped B18C5 engine identification.

2. Check engine condition: Ask about mileage, previous usage, maintenance history, and operating condition.

3. Request compression results: Compression testing can help identify potential internal engine problems.

4. Inspect the cylinder head: Check for visible damage, oil leaks, and previous repairs.

5. Check the VTEC system: Confirm the condition of the VTEC solenoid and related components.

6. Inspect the timing components: Ask about the timing belt, tensioner, and water pump maintenance.

7. Confirm included accessories: Establish whether the alternator, intake manifold, throttle body, injectors, distributor, sensors, and other accessories are included.

8. Ask about warranty: Confirm whether the seller offers a startup warranty, testing documentation, or another form of purchase protection.

A complete engine assembly may reduce the need to source additional components separately, but buyers should always verify exactly what is included in the quoted price.

Why Choose the Acura B18C5 Engine?

The Acura B18C5 remains a sought-after engine because of its original Type R engineering, naturally aspirated configuration, and high-revving VTEC performance.

It is worth considering for several applications:

• Engine replacement: Suitable for buyers restoring an Acura Integra Type R with the correct original engine.

• Vehicle restoration: An option for enthusiasts seeking to maintain the original Type R engine configuration.

• Performance projects: A potential choice for compatible Honda and Acura B-series engine swaps.

• Honda performance builds: An engine platform with an established history in naturally aspirated performance applications.

• OEM-focused projects: Attractive to buyers looking for the original US-market Integra Type R engine specification.

The right engine depends on your vehicle, installation requirements, budget, and whether you want a complete assembly or a bare engine.

The B18C5 is associated with the third-generation Acura Integra Type R, particularly the US-market DC2 platform.

Acura B18C5 Engine Specifications

Compatibility / Fitment Notes

The Acura B18C5 was originally designed for the US-market Acura Integra Type R. However, its B-series architecture makes it a potential engine-swap option for several compatible Honda and Acura vehicles.

Compatibility depends on the vehicle's chassis, transmission, engine mounts, wiring, ECU, and supporting components. An engine that physically fits a vehicle may still require additional modifications to operate correctly.