The Mini van has 165,000 miles on it. I have done oil changes on time and the engine seems to get louder as the years go by. This time is just very noisy and I hear it inside the car while driving and it gets annoying. I want to know what it is and if its worth fixing. Thanks to anyone who gives me some advice. Here is a video I uploaded to Youtube:

 

From what I just found out by looking more into this issue.... It seems the issue are worn out lifters. Can anyone confirm this for me?