HCS
In 1989 the Valencia derivative of the engine was revised once again to meet with tightening European emissions legislation. The redesign included an all-new cylinder head with reshaped combustion chambers and inlet ports, and a fully electronic distributorless ignition system. The engine was renamed the Ford HCS (standing for High Compression Swirl), although some internal Ford service publications call it the Valencia-HCS in reference to its heritage.
It first appeared in 1118cc and 1297cc guises on the Ford Escort and Orion for the 1989 model year, and on the then new Ford Fiesta Mark III the same year, which also offered a smaller 999cc version to replace the older 957cc Valencia.
The HCS is distinguishable from the original Valencia by its grey rocker cover, the "mirrored" arrangement of the spark plugs (they appear to "point inward" towards each other), and the absence of a distributor drive on the rear face of the cylinder block.
Read more about this topic: Ford Kent Engine