Haynes. Ford’s CVH Engine. Rebuild and Tuning

Ford introduced the CVH (compound valve angle, hemispherical combustion chamber) engine in 1981 with the new-look, front-wheel drive Escort. It was expected to be a replacement for the Kent Crossflow engine but this did not disappear and lives on in various modified forms. The CVH was produced in three capacities for the UK market, the 1.3 litre (1,296cc), 1.4 litre (1,392cc) and 1.6 litre (1,597cc). There was also a fairly short-lived 1.1 litre version sold in overseas markets but this is not dealt with in detail in this book. You are not very likely to find one in the UK and, even if you do, it does not lend itself to tuning for power. Should you come across a car with one of these engines it would be easier and cheaper to fit one of the larger engines and a straight rebuild is the same as for the larger capacity engines.

The CVH was also built in the USA as a 1.8-litre engine, the so-called tall block version, and some engine specialists have imported this block to build ‘big’ CVH engines instead of boring out the 1.6. There is not very much metal between the bores and the water jacket on the 1.6 and it is quite easy to break through when boring out.

Most CVH engines have been fitted to transverse-engined Escorts, Orions and Fiestas, but it was also turned round and used in-line in fairly small numbers of Sierras in 1.8 and 1.6 litre capacities…

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