Mazda B engine


The Mazda B-series is a small-sized, iron-block, inline four-cylinder engine with belt-driven SOHC and DOHC valvetrain ranging in displacement from 1.1 to 1.8 litres. It was used in a wide variety of applications, from front-wheel drive economy vehicles to the turbocharged full-time 4WD 323 GTX and rear-wheel drive Miata.
The B-series is a "non-interference" design, meaning that breakage of its timing belt does not result in damage to valves or pistons, because the opening of the valves, the depth of the combustion chamber and the shaping of the piston crown allow sufficient clearance for the open valves in any possible piston position.

1.1 liters

B1

B1 - - came only as a SOHC 8-valve. It was available in the 1987–1989 Mazda 121 and later model Kia Sephia in European and Asian markets. A fuel-injected variant was used in select European market 1991–1995 Mazda 121s

1.3 liters

BJ

The BJ engine was a DOHC 16-valve engine, used only in the Japanese market Ford Festiva GT, GT-X, and GT-A models. It generates at 7000 rpm and is equipped with Mazda's "EGi" single-point fuel injection. It is a short-stroke version of the B5/B6 engines.

B3

B3 –. It was available in SOHC variants and was found in the Kia-built 1988–1993 Ford Festiva, the 1987–1989 Mazda Familia and its derivatives, as well as the Mazda 121 in versions, and the 1987–1989 Ford Laser, and 1994–1997 Ford Aspire. Later variants were used in the Mazda Demio subcompact until 2002.
Fuel Injected Engine:
Horsepower: at 5000 rpm
Torque: at 3000 rpm
Carbureted Engine:
Horsepower:
Later versions produced at 5500 rpm, and of torque at 3700 rpm
  • 1988–2000 Ford Festiva/Mazda 121
  • 1985–2020 Kia Pride
  • Autozam Revue/Mazda 121
  • 1986–1989 Mazda Familia/323
  • 1995–2002 Mazda Demio
  • 1994–1997 Ford Aspire/Kia Avella
  • 1987–1989 Ford Laser
  • 1991–1993 Sao Penza
  • 2000–2005 Kia Rio

    1.5 liters

[|B5]

8-valve SOHC

B5 - - The SOHC 8-valve B5 upped the displacement to 1.5 liters and was found in the 1987–1989 Mazda Familia and the 1987–1989 Ford Laser. It was also fitted to the Mazda Étude coupé and fifth-generation BF-series Familia Wagon, as it continued in production until 1994 along the new BG.

16-valve SOHC

There was also a 16-valve, SOHC B5-MI version of the B5, usually fitted with single-point fuel injection. This engine was mainly used in the Japanese domestic market. The B5-ME, equipped with electronic fuel injection, was used by Kia for several of their cars as well as in the Mazda Demio.

16-valve DOHC

B5D - - A Japanese-only variant of the B5 with fuel injection and revised head/intake system. Found in the 1989–1994 BG Familia and Ford Laser S. Power output is at 6,500 rpm and at 5,500 rpm. The Timor S515i also used a B5D, with at 5,500 rpm and 145 Nm at 4,400 rpm without variable valve timing and with a 9.2:1 compression ratio. The B5D was also found in the Autozam AZ-3, a Japanese market version of the Mazda MX-3, where it produces. The Kia Rio from 2000 to 2005 also has a B5 variant, but with a different bore/stroke ratio from all others. This motor produced and.
  • Later Eunos Presso and Familia 'Interplay X' versions have a B5-ZE engine which produces at 7,000 rpm and at 6,000 rpm This was also installed in the Japanese market "Ford Laser"-badged versions of the Familia.

    1.6 liters

[|B6]

B6 — — This was a bored-out version of the B3. The 16-valve SOHC B6 was found in the 1985–1989 and 1990–1994 Mazda 323, 1991–1993 Mazda MX-3 the 1987–1990 Mercury Tracer, and the 1985–1990 Ford Laser. The 16-valve DOHC B6 was also found in the 1994–1998 Ford Laser KJ/KL, 1997–2004 Kia Sephia, Kia Shuma, 2000–2004 Kia Spectra and 2000–2005 Kia Rio.
In Japan, the United Kingdom, and Australia a fuel-injected version called the B6F was available. In Europe, the B6 also came in a 16-valve SOHC version, mostly found in the Mazda 323 BG and 323F BG models from 1989 to 1994. This engine was the same 1.6 liter fuel-injected and 88 hp. Kia's version of the B6 had a marginally shorter stroke, for a total displacement of 1,594 cc. This engine was used in the Rio, Sephia II, and Shuma.
;8-valve SOHC
  • 1985–1989 and 1990–1994 Mazda 323
  • 1994–1996 Kia Sephia
  • 1987–1990 Mercury Tracer
  • 1985–1990 Ford Laser KC/KE 323
;16-valve SOHC
;16-valve DOHC
B6-2E -, also known as B6-ME - This was a variant of the B6-E with a SOHC, 16-valve cylinder head.

B6T

B6T - - The ubiquitous turbocharged, fuel-injected and intercooled 16-valve DOHC B6, released in 1985 and used in numerous models worldwide including the 1985–1989 Mazda Familia BFMR/BFMP, 1985–1989 Ford Laser TX3 turbo, and 1991–1994 Mercury Capri XR2. This engine was most commonly found mated to a 4WD drivetrain although FWD models were also available.
Power and torque outputs varied across markets due to emission and fuel standards. The B6T available in North America came with and. The Japanese version was slightly more powerful, producing and due to better intake manifold design and its ability to run 100 octane fuel. For the special rally homologation BFMR Familia GT-Ae model released in 1987, power and torque were raised to and respectively through the use of a slightly different turbocharger; engine internals remained otherwise identical.

B6D

B6D - - The same strengthened and fuel-injected 16-valve DOHC B6 but with higher compression, no turbo, and the first Mazda engine to feature Variable Inertia Charge System. Most commonly found in the 1985–1988 Japanese market Familias, Études and Lasers, this engine was updated in 1989 with revised compression, heads and intake system for the 1989–1991 Familia and Laser, then further refined for the 1991–1994 Mercury Capri and 1994 to 1996, second Generation Mazda MX-3 RS. The third-generation B6D features an alloy cam cover, a VLIM intake, had a 9:1 compression ratio and produced 107 hp.
  • 1989–91 Mazda Familia
  • 1991–1994 Mercury Capri
  • 1994–96 Mazda MX-3
  • 1994–1996 Ford Laser
  • 1985–1988 Ford Laser, Études, Mazda Familia
  • 1995–1997 Kia Sephia

    B6ZE(RS)

B6ZE - - Developed for the Mazda MX-5/Miata and Mazda Familia sedan GS/LS Full Time 4WD. The engine uses a DOHC 16-valve alloy head with a lightened crankshaft and flywheel to allow a 7,200 rpm redline. An aluminum sump with cooling fins is an unusual feature of this engine. The US and European version had a 9.4:1 compression ratio and produced at 6,500 rpm, and of torque at 5,500 rpm. The later European version produced at 6,500 rpm, and at 5,500 rpm. It was then updated to at 6,500 rpm and at 5,000 rpm for the models from 1998 to 2005. The Japanese version of the engine also had a 9.4:1 compression ratio and produced at 6,500 rpm and at 5,500 rpm. After 1998 the power was increased to at 6,500 rpm and at 5,000 rpm.

1.7 liter diesel

PN27

PN27 - The PN27 is a 1720cc B6 based diesel motor used in the 1986–1989 Mazda Familia.

PN46

PN46 - The PN46 is a 1720cc B6 based diesel motor used in the 1987–1989 Mazda Familia

1.8 liters

B8

The B8 is not just a bored and stroked B6. Rather, it uses a new block with widened cylinder spacing. The bore is 83 mm and the stroke is 85 mm. This SOHC engine was used in various Australian Mazda 323s, the American 1990–1994 Mazda Protegé, and in Canadian variants of the 323 hatchback. It came with four valves per cylinder. It features hydraulic lash adjusters, a belt-driven cam, an 8.9:1 compression ratio, a 6,000 rpm redline, and multi-port fuel injection. Power outputs are:
  • , 111 lb-ft
  • at 5,300 rpm, at 4,000 rpm

    BP

The BP, featuring a bore x stroke of, is a DOHC 4 valves per cylinder variant of the B8. This Inline-four engine was called BP-ZE by Mazda engineers and featured a forged crankshaft, piston oil squirters, a structural aluminium oil pan with cooling fins, a 7,000 rpm redline, and Variable Inertia Charging System which is activated by a control solenoid at high rpm to increase horsepower in the upper rev range. The engine in base form on 91 RON fuel produces at 6,000 rpm and at 4,000 rpm. The engine is a favourite for both N/A and turbo motoring enthusiasts for its robust design, materials and construction. This particular variant can be found in the following vehicles:
  • 1989–1994 Mazda Familia GT
  • 1989–1994 Ford Laser TX3
  • 1994–1998 Ford Laser KJ GLXi
  • 1994–1998 Mazda Artis "LX" VICS jm1
  • 1990–1994 Mazda Protegé LX
  • 1995–1998 Mazda Protegé ES
  • 1990 Mazda Infini
  • 1990–1991 and 1993 Mazda Protegé GT
  • 1990–1993 Mazda 323
  • 1991–1996 Ford Escort GT and LX-E
  • 1991–1996 Mercury Tracer LTS
  • 1995–1997 Kia Sephia RS, LS, GS
  • 1994–1998 Mazda Familia
  • 1994–1998 Mazda Lantis
  • 1994–1997 Mazda MX-5/Miata
  • 1997 Ford Laser Ghia
There is also a non-performance SOHC version that is most easily recognized by its black stamped-steel oil pan. It also features a cast crankshaft, no oil squirters, a plastic oil pickup tube and less aggressive camshafts. It is found in the 1995–1998 Mazda Protege ES.

BPT

The BPT is a turbocharged and intercooled variant of the BP. It produced at 6,000 rpm and of torque at 4,000 rpm in JDM-spec from G7+ CJ26 AH7 crankshaft. 95 octane rated European models only claimed at 5,500 rpm and at 3,000 rpm.
It featured an IHI RHB5 VJ20 turbocharger, sidemount intercooler, 330 cc blacktop injectors. The BPT versions of the Familia and Laser were only available in AWD models, and featured a viscous LSD centre and rear differentials.
Applications:
  • 1989–1994 Mazda Familia GT-X
  • 1989–1994 Ford Laser TX3 turbo
  • 1989–1994 Mazda 323 GT
  • 1989–1994 Ford Laser ''GT-X''