MAZDA B6-DOHC BP-DOHC ENGINE WORKSHOP MANUAL

Mazda

This manual explains the disassembly, inspection, repair, and reassembly procedures for the above-indicated engine. In order to do these procedures safely, quickly, and correctly, you must first read this manual and any other relevant service materials carefully.

The information in this manual is current up to June, 1994. Any changes that occur after that time will not be reflected in this particular manual. Therefore, the contents of this manual may not exactly match the mechanism that you are currently servicing.

B6 ENGINE

1.6 L (1,597 cc) B6 — (78.0×83.6 mm) — 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 (for export markets).

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 DOHC version, mostly found in the Mazda 323 BG and 323F BG models from 1989-1994. This engine was the same 1.6 liter fuel-injected, but with two camshafts and 88 hp. Kia’s version of the B6 (16-valve DOHC) had a marginally shorter stroke (at 83.4 mm), 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
1987-1990 Mercury Tracer
1985-1990 Ford Laser KC/KE

16-valve SOHC

1991-1993 Mazda MX-3
1989-1994 Mazda 323 BG
1989-1994 Mazda 323F BG/Mazda Astina BG
1989-1994 Ford Laser KF/KH

16-valve DOHC

1989-1993 Mazda Miata
1993-1999 Mazda Xedos 6
1997-2004 Kia Sephia/ Kia Shuma/ Kia Spectra
2000-2005 Kia Rio (for export markets only)
1997-2003 Mazda Familia

BP ENGINE

The 1,839 cc or 1.8 BP is a DOHC (dual-overhead camshaft) variant of the B8, featuring an 83 mm bore and 85 mm stroke and four valves per cylinder. This 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 Intertia Charging System VICS which is activated by a control solenoid at high rpm to increase horsepower in the upper rev range. The engine in base form on 91RON fuel produces 96 kW (129 hp) at 6,000 rpm and 165 N⋅m (122 lb⋅ft) 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 (European & Australian Market)
1989-1994 Ford Laser TX3 (Australian Market)
1994-1998 Ford Laser KJ GLXi (Australian Market)
1994-1998 Mazda Artis “LX” VICS jm1 (North America Market)
1990-1994 Mazda Protege LX (with VICS)
1995-1998 Mazda Protege ES (Australian Market: 1994-1998 323 Protege SE)
1990 Mazda Infini
1990-1991 and 1993 Mazda Protege GT (Canadian Market)
1990-1993 Mazda 323 (European Market)
1991-1996 Ford Escort GT and LX-E
1991-1996 Mercury Tracer LTS
1995-1997 Kia Sephia RS, LS, GS
1994-1998 Mazda Familia (Japanese Market)
1994-1998 Mazda Lantis
1994-1997 Mazda MX-5/Miata (did not have VICS until 1999)
1996-1998 Suzuki Cultus Crescent/Baleno/Esteem

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.

Mazda Motor Corporation 1994
PRINTED IN JAPAN, July 1994
Form No. 1425-10-94G
Part No. 9999-95-EWBP-95

Language: English
Format: PDF
Pages: 58

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