anybody know if my 07cat c13 acert has egr valve&cooler if so where and how to check for leaks and will it leak into oil

You got to be kidding....

you know i have had about enough of your smart ass answers ive got better things to do they should kickyou to the curb im out a here and gona spread the word !!!!!!!!

Kids! May i suggest you'll get out of trucking also? We all gonna benefit from that, including you....