Ford CVH engine

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The letters CVH denote a particular type of 4-cylinder internal combustion engine produced by the Ford Motor Company during the 1980s and 1990s.

The CVH (Compound Valve angle Hemispherical combustion chamber) engine was introduced by Ford in 1980 in the third generation Ford Escort. It was later used in the Ford Sierra as well as the second generation Ford Fiesta and from 1983 it was used in the Ford Orion. Engines were built in the Dearborn Engine Plant for the North American market, and in Ford's then-new engine plant in Bridgend in Wales for the European market.

The engine was originally conceived in 1974 and is unique in terms of its valves mounted at a compound angle, which allows for a hemispherical combustion chamber shape without using a more expensive twin camshaft arrangement. It also featured hydraulic valve lifters, a first for a European Ford engine.

Throughout its 20-year production life, the CVH had a reputation for being almost painfully coarse and noisy at high revs (CVH, said some pundits, was an acronym for Considerable Vibration and Harshness). Jeremy Clarkson famously said of the CVH-powered Escort that "it was powered by engines so rough, even Moulinex wouldn't use them".

The CVH was also notorious for its lubricating oil to sludge prematurely if the service schedule was skipped. Timing belts frequently failed about 60,000 to 90,000 miles (100,000 to 150,000 kilometers) (again if the service schedule was skipped).

Despite its considerable shortcomings in terms of NVH (Noise, Vibration and Harshness), and its aforementioned intolerance to poor or neglected servicing, the CVH was regarded as being a very easy engine to tune, and with many of its key components being considerably over-engineered. It wasn't long before the engine started receiving attention from the aftermarket tuning industry, and the 1.6 litre version quickly became a stalwart of the tuning scene in the 1980s and 1990s with some phenomenal power outputs (over 200 bhp) being extracted from the turbocharged variants. The naturally aspirated 1.6 was a popular choice for the kit car industry where it could be relatively easily and cheaply tweaked to around 130 bhp.

The CVH was produced in many different capacities from 1.1 to 2.0 litres, the smaller versions being exclusively for the European market.

Contents

[edit] 1.3

The 1.3 L CVH was introduced in the 1980 European Escort and in the Orion and Fiesta from 1983 to 1986. Bore was 80.0 mm and stroke was 64.5 mm. The 1.3L was also planned for the North American version of the Escort, but engineering tests found it to be unacceptably underpowered, and plans to produce 1.3L engines were scrapped just a few months before full-scale production.

[edit] 1.4

The 1.4 L CVH replaced the 1.3 L CVH in the Escort, Orion and Fiesta from early 1986. Bore was 77.2 mm and stroke was 74.3 mm. In European trim, this engine produced 75bhp

[edit] 1.6

The 1.6 L CVH was used in the 1980 European Escort and 1981 North American Escort. Bore was 80.0 mm (3.149 in) and stroke was 79.5 mm (3.130 in). Output was 69 hp (52 kW) and 86 ft.lbf (117 Nm), while European versions produced 90hp in standard carburettor trim, or 105 hp, 108 hp or 115 hp in various fuel injected versions. The 115 hp version was restricted to the very rare Escort RS1600i

[edit] 1.6 Turbo

An uprated, turbocharged version of the 1.6 which was developed by Ford Europe for the hugely popular RS Turbo version of the Escort and also later the Fiesta. It made 132 bhp at 6,000 RPM, and 133lb/ft of torque at a very tractable 3,000 RPM. Tuners could increase these figures by more than 50% for a relatively reasonable fee.

[edit] 1.9

The CVH was bumped up to 1.9 L for the North American 1986 model year Escort. Bore was now 82 mm (3.230 in) and stroke was up as well to 88 mm (3.465 in). This stroke length would be used in all future CVH engines, and continued into the Zeta engine which replaced it. This long stroke necessitated a raised engine block deck, a design also shared with later units. Output was 86 hp (64 kW) and 100 ft.lbf (136 Nm).

Electronic fuel injection and hemispherical "hemi" combustion chambers were added for 1987's Escort GT, bumping output to 108 hp (81 kW) and 114 ft.lbf (155 Nm). The second generation of American Escort got sequential EFI for 1991-1996, but power and torque was little changed at 88 hp (66 kW) and 108 ft.lbf (146 Nm) respectively.

[edit] 2.0

The 2.0 was introduced in the 1997 Escort. It now used split port induction and produced 110 hp (82 kW) and 125 ft.lbf (170 Nm). The additional displacement was achieved by boring the 1.9 engine to 84.8 mm (3.339 in). It is known to be more refined then the 1.9L, but is basically the same as the 1.9L and was used only on the wagon and 4 door sedan versions. Also this same engine was used in the American-market Ford Focus Base Sedan/Wagon from 2000 to 2004.

[edit] Applications

Note that the 1.1 L version was only offered in Continental Europe, 1.1 L Escort Mk.3's for the United Kingdom used the 1117cc Kent engine although some right hand drive examples were built with the CVH mechanicals in this capacity including the van variant.

[edit] CVH-PTE

The CVH-PTE is a revised version of the Ford CVH engine which was introduced on the European Ford Escort in 1995. It features a thicker crankcase to combat the harshness at high revs, although the 1990s saw it gradually being phased out in favour of the newer Zetec 16-valve unit.

[edit] See also

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