Knocking noise

[Chelo’s 5.0]

So i took my block to get rebuild at a machine shop and heads to get them check and they change the some valves. So when i put the motor back and start it. I hear a knocking sound.

Does anybody know what can it be?

 

[deathb4dismount]

So i took my block to get rebuild at a machine shop and heads to get them check and they change the some valves. So when i put the motor back and start it. I hear a knocking sound.

Does anybody know what can it be?

You'll have to be more specific, it could be one of several things from really bad to an easy fix. Post a video if you can.

 

[mikestang63]

 

[87 black gt]

What ever it is, it's not good liked Mentioned above need video, what was the oil pressure reading?