hey guys, im fairly new to this forum, ok i need some expert advice. i bought a 2008 str 2.5 just over 12months ago atm it has 120k's on it and it has always been serviced until i missed one, any how i was having problem with it which turned out to be the injectors which i got cleaned and my mechanic did a test to if the cylinder valves. he said that number 3 cylinder exhaust valve was stuffed and it would need to be redone. what would my best options be, he said i would be looking at atleast $3500. with a new timing chain in it aswell. is that about right or hav i got sucker written all over me. this is my first diesel aswell