MAZDA ENGINE B6-DOHC BP-DOHC WORKSHOP REPAIR MANUAL
ALL YOU NEED TO KNOW IN THE SERVICE AND REPAIR OF YOUR ENGINE
1.6 L (1,597 cc) B6 (78.0×83.6 mm) This was a bored-out version of the B3. The 8-valve SOHC B6 was found in the 1985-1989 and 1990-1994 Mazda 323, the 1987-1990 Mercury Tracer, the 1992 Mazda MX-3, and the 1985-1990 Ford Laser.
In Japan, the United Kingdom, and Australia a fuel-injected version called the B6F was available. Kia’s version of the B6 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.
The 1.8 L (1,839 cc) BP is a dual-overhead variant of the B8. It was first found in the 1989 Mazda Familia and American-market 1990 Mazda Protege LX. This engine was dubbed BP-ZE and featured a forged crankshaft, piston oil squirters, a structural aluminum oil pan with cooling fins, a 7,000 rpm redline, and the Variable Inertia Charging System (VICS). 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)
* 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)
* 1994-1997 Mazda MX-5/Miata (did not have VICS until 1999)
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.