Very Carefully! If you don't get the springs exactly how they should be, your car will not run. It is best to take it to a pro if you need any work done on the valves of ANY car, even if it's just an adjustment!
The 2004 Mazda MAZDA3 has 16 valves.
The 2006 Mazda MAZDA5 has 16 valves.
The 2005 Mazda MAZDA3 has 16 valves.
The 2010 Mazda MAZDA5 has 16 valves.
The 2004 Mazda MAZDA6 has 16 valves.
The 2010 Mazda MAZDA6 has 16 valves.
The 2015 Mazda MAZDA6 has 16 valves.
The 2011 Mazda Mazdaspeed3 has 16 valves.
The 2012 Mazda MAZDA3 has 16 valves.
The 2009 Mazda MAZDA5 has 16 valves.
The 2013 Mazda MAZDA2 has 16 valves.
The 2008 Mazda MAZDA6 has 16 valves.