well i waited for ever to get my egr delete from river city diesel and I finally get it, along with the blue spring fuel pressure kit. I took my egr valve out and cleaned it all out just because I do it every sunday. Let the truck sit untill this past thursday, drove the truck 5 miles to the shop to have the delete installed. I get a phone call Friday afternoon saying the oil cooler is shot and the coolant has oil in it, the egr valve was pulled and it was covered in coolant. The past sunday I cleaned it the valve was just full of carbon buildup. Guess the cooler went out on the way to the shop.