The timing chain needs no maintenance. It is designed to last the life of the engine and is replace when the engine is rebuilt.
The 2008 Ford Focus has a timing chain, not a timing belt. The Focus has used a timing chain sense 2005. Timing chains are designed to last the life of the engine.
For a 2007 Ford Focus : The 2.0 and 2.3 litre four cylinder engines have a timing CHAIN
The Ford Focus 2.0L has a timing chain.
timing CHAIN
It has a timing chain.
timing CHAIN
It has a timing chain.
Timing CHAIN ( 2011 Ford Focus 2.0 liter )
My 2004 Focus PZEV has a timing chain. 103,000 miles with no problems.
It uses a timing chain.
chain
Timing chain