Mazda G engine#G6
{{Refimprove|date=December 2009}}
{{Infobox automobile engine
| name = Mazda G engine
| manufacturer = Mazda
| production = From 1989 to 2014
| configuration = Inline-4
| head = Aluminum
| valvetrain = SOHC 3 valves x cyl.
| displacement = {{convert|2606|cc|L|1|abbr=on|disp=flip}}
| bore = {{convert|92|mm|2|abbr=on}}
| stroke = {{convert|98|mm|2|abbr=on}}
| block = cast iron
| timing = Chain
| compression = 8.4:1
| redline = 6000 RPM
| specpower = {{Convert|{{#expr:102/2.606 round 1}}|hp|kW PS|1|abbr=on}}
| torque = 202
| fuelsystem = EFi
| fueltype = Gasoline
| coolingsystem = Water
| power = {{Convert|121|hp|kW PS|0|abbr=on}}
| successor = Ford EcoBoost engine (Mazda GY)
}}
The G family of Mazda engines is a family of large inline-four piston engines that was commercialized from 1989 to 2014. The series started at 2.6 L for the Mazda B-Series truck from 1988. Prior to that, a 2.6 L Mitsubishi engine had been used.
G54B
The 2.6 L Mazda G54B was actually a Mitsubishi engine. It displaces {{convert|2555|cc|L|1|abbr=on|disp=flip}} and was used in the B2600 pickup from 1986 to 1988, until Mazda developed their own suitable engine.
==G6==
Mazda replaced the G54B with its own 2.6 L G6 engine which displaces {{convert|2606|cc|L|1|abbr=on|disp=flip}}. Bore and stroke are {{convert|92x98|mm|2|abbr=on}}.{{Cite book | title = Quattroruote: Tutte le Auto del Mondo 1990 | editor = Mastrostefano, Raffaele | publisher = Editoriale Domus S.p.A | year = 1990 | page = 492 | language = Italian | location = Milano }} The G6 was produced until 1993 and made 121 hp (90 kW), 149 lb⋅ft (202 N⋅m) for North American models. The G6E which replaced it was used in other markets around the world.
Compression Ratio: 8.4
Valve train: 12V SOHC
Applications:
- 1989–1993 Mazda B2600i
- 1998–2006 Mazda B2600
- 1989–1996 Mazda MPV
- 2007-2014 Mazda BT-50
G5
The 2.5 L G5 was an evolution of the G6. It produces {{Convert|102|hp|kW PS|0|abbr=on}} at 4000 rpm.
Applications:
- 1995 Mazda B2500
- 1996-1999 Mazda MPV
GY
The GY is not at all related to the Mazda G-series four-cylinder engines and is listed in this article strictly by engine code association. GY is the Mazda engine code for a {{convert|2494|cc|L|1|abbr=on|disp=flip}} Ford Duratec V6 engine which, due to an OEM deal with Ford, was built by Mazda in Japan for limited use in the 1999-2001 Mazda MPV. This Duratec V6 engine was in turn based on the original Mazda KL {{convert|2495|cc|L|1|abbr=on|disp=flip}} from 1991. By the late 1990s (during the Mazda/Ford partnership) Ford executives had ordered Mazda to cease development of V6 engines and instead focus on a new range of four-cylinder engines for both companies' benefit, which would become the MZR/Duratec lineup of inline-four engines. The order to discontinue their own V6 development included the Mazda K engine, leaving Mazda the only option of employing later Ford V6s, which were considerably cheaper to manufacture.
Applications:
- 1999-2001 Mazda MPV (second generation)