Originally Posted by rage123
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.
Could be timing related. That one should be set at 0 degrees, and electronically adjusted with a scan tool. The engine rpm needs to be raised/goosed above 2000-2500 rpm, then let idle, for each distributor movement/timing adjustment, until it is set at 0 degrees timing (on the scan tool).
Hope this helps.