Ford Cologne V6 engine 4.0
1992 4.0 from a Ranger.
The 4.0 L pushrod (245 CID; 4009 cc) version, although produced in Cologne, Germany, was only fitted to American vehicles.[1] The OHV engine was produced until 2000 and was used in the Ford Explorer, Ford Aerostar, Mazda B4000 and Ford Ranger. Output was 160 hp (119 kW) and 225 lb·ft (305 N·m). Though there is some variation, typically 155 hp (116 kW) is quoted as horsepower for 1990-92 applications.[citation needed]
This evolutionary redesign of the American 2.9 solved many of the reliability issues that plagued its predecessor. A stronger cylinder head design eliminated the 2.9's common failure of cracked heads. Hydraulic roller lifters replaced the simple hydraulic lifters used in the 2.9, which were sometimes overly sensitive to oil contamination, often requiring the lifters to be replaced prematurely. However, one major design fault was not completely eliminated: Valve rockers and upper pushrod tips still received poor oil supply, resulting in eventual wear to these areas, and consequential valvetrain noise as a result of the increased clearance. Required replacement of these parts is common in older engines.[citation needed]
Applications:
Ford Ranger/Mazda B-Series
Ford Explorer/Mazda Navajo
Cross Lander 244X
Ford Aerostar (1990–1997)
SOHC
The SOHC version was introduced in 1997 in the Ford Explorer, alongside the original pushrod version. It features a variable length intake manifold and produces 210 hp (157 kW) and 254 lb·ft (344 N·m)f. It uses a jackshaft in place of a camshaft to drive a timing chain to each cylinder head. Three timing chains are used, one from the crank to the jackshaft, one in the front of the engine to drive the cam for the left bank, and one on the back of the engine to drive the cam for the right bank. Ford has since phased out the engine in favor of the more powerful and efficient Duratec 37. Ford Power Products sells this engine as the SOHC-640.[2]
A version of the engine is used in the Land Rover LR3 in Australia and Canada, producing 216 hp (161 kW) and 250 lb·ft (339 N·m) of torque at 3,000 rpm. The Land Rover version of the engine became unavailable in the United States for the 2008 model year.[3]
Applications:
2001–2011 Ford Ranger
2001–2010 Mazda B4000
1997–2010 Ford Explorer/Mercury Mountaineer
2005–2010 Ford Mustang
2005–2009 Land Rover LR3