Kia Troubleshooting Questions? Ask a Mechanic
Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.
The 1.6 engine in 2006 Rio does have 2 camshafts, but only one timing gear in the front of the engine. It should look like this,
The timing marks should line up like this, (the holes will line up so that you can put a small drill bit in them)