I do most maintance myself, brakes, anti-freeze etc, is changing these plugs going to be difficult? Is there any step by step instructions out there? Any suggestions? Thanks...

 

I don't own aSonata but the 2.7L V6 in the Sonata is that same engine as the 2.7L V6 in the 2003-up Tib (with some minor differences to fit the different chassis. Below are 2 links on how to do iton the Tib. It should be the same for the Sonata. This one explains how to remove both the upper and lower manifolds (you only need to do the upper half): http://www.newtiburon.com/forums/showthread.php?t=1760 http://www.newtiburon.com/forums/showthread.php?t=70634

 

Hey thanks for the info...