Originally Posted by willwren
Hard to tell until you shoot video from farther away (out of the engine bay) and from underneath, but I'd say it'* either rod knock, wrist pin, or a lifter. In any case:
How'* the coolant look? What about the oil?
Willwren thanks for the link to the previous post.
I changed the upper intake maybe 4 or 5 years ago with a new one from GM dealer. I did not change the lower intake gaskets at the time though. I think I changed it before I found this forum. I'll have to check tomorrow in the daylight to see what the date stamp on the UIM is.
I change oil regularly, 3k-5k miles, try to make it around 3k. Oil has not had water in it since changing UIM.
I'll try to get another video maybe tomorrow further away from the engine. I wasn't sure if the knocking would be picked up by the camera if the camera was further away.
I didn't mention in my first post that I've had the torque converter shudder while in lock up when a load is put on the engine. Had it when I bought the car at 122k, car now has 182k on it. No other problems with tranny the whole time.