Mazda K Engine - KL

The 2.5 L (2497 cc) KL family uses an 84.5 mm bore and 74.2 mm stroke. It includes the Japan-only KL-ZE, which produced 199 hp (149 kW) and 165 lb·ft (224 Nm). Another variant, the KL-DE (also known as the KL-03 outside the USA, and fitted to 2.5 litre Ford Probes) was the worldwide version, with 164-174 hp in various applications. In 1998 a revised version of the KL known as the KL-G4 was used in the 626. It featured solid lifters, a cast crankshaft to reduce rotating mass and a reworked intake system. The distributor was replaced with a Ford EDIS coil-pack ignition.

Mazda introduced a key technology with these engines, known as the Variable Resonance Induction System (VRIS). A series of two butterfly valves coupled with electronically controlled actuators varied the volume and length of a resonant chamber attached to the intake manifold, producing 4 resonant frequencies. The valves actuate at particular engine frequencies (i.e. rpms) to produce optimal torque/horsepower output at any given engine speed.

Applications:

• KL-DE
  • 1988-1992 Mazda MX-6 GT (E and J spec)
  • 1993-1997 Mazda MX-6 LS (A spec)
  • 1993-1997 Ford Probe GT
  • 1992-1995 Ford Telstar TX5 Ghia, TX5 Ghia 4ws
  • 1993-1997 Mazda 626 ES, LX (after 1994)
  • 1995-2002 Mazda Millenia L
• KL-ZE
  • 1997 Mazda Capella Wagon
  • 1993+ Mazda 626 Jspec Sedan
  • 1993+ Mazda MX-6 Jspec
  • 1993+ Mazda MS-8 (Japan)
  • 1993+ Mazda Eunos 600/800 (Japan)
• KL-G4
  • 1998-2002 Mazda 626 ES, LX