Ford Mondeo V6 engine
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| Duratec 25/30 | |
| Manufacturer: | Ford Motor Company - Brief |
|---|---|
| Production: | 1994– |
| Predecessor: | Ford Vulcan Mazda K series |
| Successor: | Duratec 35 |
| Class: | DOHC 60° V6 |
| Engine: | 2.5 L (2544 cc/155 in³) 2.5 L (2498 cc/152 in³) 3.0 L (2967 cc/181 in³) |
| Related: | Jaguar AJ-V6 |
Ford Motor Company's modern 2.5L and 3.0L V6 automobile engines are evolutions of the same design, first used in the 1994 Ford Mondeo. This line is sold under the brand name "Duratec", as are many other engines.
The Mondeo V6 is a modern aluminum DOHC V6 with a 60° bank angle. The primary engineering input came from Porsche, who were developing a similar V6 before selling the engineering to Ford, and Cosworth, who helped with cylinder head manufacturing. The Jaguar AJ-V6 engine is similar but adds variable valve timing. Mazda's AJ version also has this feature.
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[edit] Duratec 25
The Duratec 25 is a 2.5 L (2544 cc) 60° V6 and was introduced in 1994. It was developed for the Ford Mondeo and used in the Ford Contour, Jaguar X-Type, and others. Bore is 82.4 mm and stroke is 79.5 mm.
The Duratec 25 was on the Ward's 10 Best Engines list for 1995 and 1996, and the SVT version made the list for 1998 and 1999.
[edit] Duratec 25 Si
An SVT version produced 195 hp (145 kW) and 165 ft·lbf (224 N·m) in 1998. It included a larger throttle body from the Duratec 30, a new cone-shaped air filter, and extrude honing on the intake manifold. SVT specific cams, a lighter flywheel and low-restriction exhaust complete the picture. Further improvements were made in 1999 that raised power output to 200 hp (149 kW) and 169 ft·lbf (229 N·m) and were carried over in the 2000 model. The SVT engine was used in the 1998-2000 Ford Contour SVT.
[edit] Duratec VE
The 2.5 L, 170 hp V6 used in the second generation Ford Mondeo is called Duratec VE. Displacement was decreased from 2544 to 2495 cc.
[edit] Mazda AJ
Mazda used the Duratec 25 block and camshaft in their 2000 MPV. However, they reduced the size from 2.54 L to 2.49 L to keep under a 2.5 L tax cap in Japan. This was accomplished with a reduction of the bore from 82.420 mm to 81.660 mm (both round to 3.2 in). The engine produced 170 hp (127 kW) at 6250 rpm and 165 ft·lbf (224 N·m) of torque. It was replaced in 2002 with the larger 3.0 L Duratec 30-based Mazda AJ.
[edit] Duratec 30
Ford's standard DOHC V6 is known as the Duratec 30 or Mazda AJ. It was introduced in 1996 as a replacement for the 232 Essex in the Taurus/Sable. It has 3.0 L (2967 cc) of displacement and produces between 200 and 240 horsepower (150 and 180 kW). The same engine is used by the Jaguar S-Type, Lincoln LS, Mazda MPV, Mazda6, Mondeo ST220 and many other Ford vehicles. It is essentially a bored-out (to 88.9 mm) Duratec 25 and is built in Ford's Cleveland Engine #2 plant. A slightly modified version for the Ford Five Hundred entered production at the Cleveland Engine #1 plant in 2004.
It has an aluminum engine block and aluminum DOHC cylinder heads. The cylinders are lined with cast iron. It uses SFI fuel injection, has 4 valves per cylinder and features fracture-split forged powder metal connecting rods and an assembled cast aluminum intake manifold.
There are two key versions of the Duratec 30:
- DAMB - The Lincoln LS and Jaguar AJ30 versions have direct-acting mechanical bucket (DAMB) tappets. Output is 232 hp (173 kW) at 6750 RPM with 220 ft·lbf (298 N·m) of torque at 4500 rpm.
- RFF - The Taurus/Sable/Escape version uses roller finger followers (RFF) instead and produces 201 hp (150 kW) at 5900 RPM with 207 ft·lbf (281 N·m) of torque at 4400 rpm.
[edit] RFF
Applications:
- 208 hp RFF
- 1996-2005 Ford Taurus/Mercury Sable
- 2001-2005 Ford Escape/Mazda Tribute
- 2005-2006 Ford Five Hundred, Mercury Montego and Ford Freestyle
The Essex 3.8L V6 produced 215 ft·lbf of torque, its single advantage over the smoother, more reliable, and higher tech 3.0L Duratec 30. The 3.8L Essex was widely known through the 1990s for blowing head gaskets due to its cast iron block and aluminum head (the gaskets were poorly designed to cope with the temperature differences these two produced, thus the head warps and blows the gasket).
[edit] DAMB
- 232 hp DAMB
- 2000-2005 Lincoln LS
- Jaguar AJ30 DAMB
[edit] VVT
The 2006 Ford Fusion, Mercury Milan, and Lincoln Zephyr feature a version of the Duratec 30 utilizing variable valve timing. The VVT is an RFF engine and does not have the mechanical buckets as on the Lincoln LS version.
The engine has an output of 221 hp (165 kW) at 6250 rpm, and 205 ft·lbf (278 N·m) of torque at 4800 rpm.
[edit] Mazda MZI
Mazda's MZI version adds variable valve timing, as does Jaguar's AJ30. It displaces 2967 cc with an 89 mm bore and 79.5 mm stroke. Output (on the MPV) is 200 hp at 6200 RPM with 200 ft·lbf (271 N·m) of torque at 3000 rpm. Note that the MZI name is also used in Europe on Mazda's version of the Ford Sigma I4.
[edit] Duratec ST
The 3.0 L, 226 hp V6 used in the Mondeo ST220 is called Duratec ST.
[edit] Duratec SE
The 3.0 L, 204 hp V6 in the Mondeo Titanium is called Duratec SE.
[edit] See also
