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The B-series Honda DOHC engines are popular automotive engines from the modern series of Honda engines. They are good performers from the factory having models with around 126hp to around 200hp and even some models having a redline over 8,000 rpm. more...

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They accept high performance modifications well without much risk to reliability. The engine has been made in 1.6, 1.7, 1.8, and 2.0 liter variants, with and without VTEC (variable valve timing and electronic lift control). Later models have some minor upgrades, for instance modifications to the intake valves and ports and piston tops, and moving the dipstick away from the exhaust manifold.

Engine swaps

The B-series engine is one of the most common engines used for engine swaps in Hondas. Various versions are found in American junkyards, mostly in Acura Integras. They were also found in many JDM Hondas and are quite plentiful in Japanese junkyards, and great numbers have been imported from Japan in the last few years. The JDM engine has some slightly different parts (e.g. throttle body) than the USDM version, and tend to have slightly higher horsepower ratings with the JDM equivalent of the B18C1 producing 10 horsepower (7 kW) more than its USDM counterpart. Also, the wiring harness is set up for right hand drive as Japan uses, rather than left hand drive as in the United States or Canada; this is just a minor nuisance, however, as the wires will all fit if some of the mounting clips are released.

The B-series engine fits nicely under the hood of many Civics, a common target for such swaps. Note that the actual B-series engine will not adapt to the transaxle that came with other engine models, therefore the entire powertrain, i.e. engine and transaxle, must be swapped as a unit; normally, however, the entire powertrain is what is meant when "engine" swaps or availability of used "engines" is discussed with respect to front wheel drive cars.

Note that the ECU (engine computer) must be swapped as well. Aftermarket modified ECUs are available, ranging from close to stock B-series to wildly modified, with various degrees of skill. If a VTEC engine is to be installed in a car which did not have a VTEC engine, then additional wiring for the VTEC will have to be run; a minor chore.

The B-Series engine swap is very popular for 1992 through 1995 Civic owners since it is so easy to perform. The B-series engine was available in the United States 1994 Civic-based Del Sol; therefore the stock Honda motor mounts, axles, transmission linkage, and other auxiliary parts on the B-series engine (as well as the ECU, of course) will adapt it to any Civic of that era. Some swaps such as the B20B from the CRV are hard to perform due to the CRV's transmission not fitting therefore the need of a piecing together a transmission. The corresponding parts that came with the stock SOHC D-series engines will not fit the B-series, however. Unfortunately, most of the available engines are removed from the car without any of these parts, and often even the wiring harness has been destroyed, so the parts have to obtained by either scouring junkyards or purchased from Honda at substantial expense. If at all possible, an engine with a complete set of these parts is greatly to be desired over just the engine itself for this kind of swap.

Read more at Wikipedia.org