also might have to replace head gasket, long story short 110k on my 2006 and was blocking off my egr cooler because of agns if leaking, fuel economy in the low 30's and exhaust and coolant smell in cab. So I also popped valve cover off and Wala cam #1#4 copper streaks and campfer gone have not removed head yet but there is signs of coolant from hg. Boo anyone else replace hg and any specific reasons for leak, over pressure cracked head lose hg bolts? Just looking for a list for process of elimination caused.
