Variable camshaft timing

It uses electronically controlled hydraulic valves that direct high pressure engine oil into the camshaft phaser cavity.

These oil control solenoids are bolted into the cylinder heads towards the front of the engine near the camshaft phasers.

The powertrain control module (PCM) transmits a signal to the solenoids to move a valve spool that regulates the flow of oil to the phaser cavity.

The 2002–2004 SVT Focus (ST170 in Europe) also featured VCT, but on the intake camshaft of its modified version of the 2.0L Zetec engine.

In addition, the 1.7L Zetec-S engine found in the European Ford Puma was equipped with variable camshaft timing.