The Honda B-series covers a wide set of 1.6–2.0 L fours used in Civic, Integra, Del Sol, CR-V, and related platforms. Correct identification prevents wrong gaskets, pistons, ECUs, and transmissions.

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Primary Identifiers#

1. Engine code stamp on the block (full code such as B18C1, B16A2, B20B).
2. Cylinder head castings (examples: PR3, P72, P61) for VTEC vs non-VTEC and port family.
3. OBD generation of the wiring and ECU (OBD0 / OBD1 / OBD2).
4. Transmission that left the factory with the engine (cable vs hydraulic clutch, LSD, final drive).

Do not rely on valve-cover stickers alone - they are swapped constantly.

Family Map#

Exact bore, stroke, compression, and power ratings are year- and market-specific. Pull the FSM line for the stamped code.

What to Capture Before Ordering Parts#

• Full code + serial
• Manual or automatic origin
• Intake manifold type
• Distributor vs later ignition arrangements by market
• Whether the oil pump is early/late and whether a windage tray or different pan is used

Swap and Hybrid Cautions#

B20VTEC-style hybrids change compression and piston-to-valve clearance. Treat them as custom:

• Measure deck height and chamber volume
• Confirm oil feed to VTEC
• Match ECU, injectors, and MAP/vacuum routing

Related Articles#

• B-series torque specifications
• Head gasket and timing belt procedures
• Transmission identification when mating gearboxes