It has a timing chain and 2 external belts.
timing chain
The 2008 Kia Optima 4 cylinder equipped with a timing chain will normally last the life of the engine and is changed when the engine is rebuilt. The 2.7 Liter V6 is equipped with a timing belt which MUST be changed every 60,000 miles. Warning the V6 is an interference engine.
you have a timing belt its be-hin the cover
timing chain
The 2011 Kia Optima has a timing chain.
A 2008 4Runner V6 has a CHAIN. The V8 4Runner has a timing BELT.
how do you replace the timing belt and time the engine of a2003 kia optima
The 2.0 liter four cylinder engine in a 2008 Hyundai Elantra has a timing BELT
4 cylinder still have timing belt.
Does not have a belt but a timing chain in 2007.
it has a timing chain 05-08