try figuring this one.
I run a shop out of arkansas and have a problem with a 97 chevy tahoe 5.7 lt. Problem is, it is knocking but didnt prior to having the entire intake replace by one of my guys. only reason for replacing intake was because he broke one of the coolant ports off. There is no antifreeze or anything else like that in the oil. Im not sure if he did something wrong which caused this and he is just trying to cover it up or what. Ive checked the oil pump driver and seemed fine. if anyone has ever seen this or has any other ideas please let me know. Thanks.