Yes, the strut bar which i tightened today. But still only one knock when i turn on the car... I feel wierd driving the car, I am like the cleanest person I like everything to work perfect. Everything is tightened am sure, just there is that knock. I feel like its coming from under the car maybe the exhaust or downpipe that are?

 

Also I just seen a few videos of rod knocks it sounds like one those knocks but one when i turn the car on.. just one knock..

 

Also this mechanic that did my head gaskets broke 2 of my exhaust valves and he replaced only 2 with some other kind, also my pistons have a hit from the valves. Just to let u know. This problem is buggin me so much.