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The camshafts were made hollow for weight savings, along with the addition of a roller-finger follower valvetrain. The compression ratio was increased from 10.0:1 to 10.5:1 on lower output versions; higher output versions such as the 3.5L EcoBoost HO in the F-150 Raptor, have lower compression ratios like 10.0:1 and as low as 9.0:1 in the Ford GT.
The Cyclone engine, also branded Duratec, is Ford Motor Company's latest DOHC family of gasoline V6 engines introduced in 2006. [1] The Cyclone succeeds Ford's previous V6 engine families, including the Canadian built Ford Essex engine introduced in 1981, the Ford Vulcan engine introduced in 1985, the original Duratec V6 introduced in 1993, and the Ford Cologne V6 engine, whose design dates ...
4.2 L Essex V6 in a 1998 F-150 The largest displacement version of the Essex V6 appeared in the 1997 model year as a replacement for the Ford 300 straight six in the F-150. This engine kept the 3.8 L's bore, but featured a stroke lengthened to 95 mm (3.74 in), bringing its displacement up to 4,195 cc (256.0 cu in).
A racing version of this engine exists and is used on mini prototypes like the Juno SS3 V6. It is a 3.0 L (2,967 cc) naturally aspirated non variable timing engines producing between 350 and 400 hp (261 and 298 kW) with a redline of around 8700 rpm. The engine has a 40-hour racing life span before it needs to be rebuilt with rings and bearings ...
Another change was a fix for the timing chain tension issues. The turbo seals were also updated. While the 2.0 L Ford EcoBoost engine and its later 2.3 L variant share a cylinder block with the L3-VDT and are derived from the Mazda L architecture, little else is shared between the EcoBoost and L3-VDT and they should not be confused with one ...
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Aside from the belt/chain itself, also common is a failure of the tensioner, and/or the various gear and idler bearings, causing the belt/chain to derail. Furthermore, in engines where the timing belt drives the water pump, failure of the water pump can cause the pump to seize, which can break the timing belt or chain.
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