Just recently had 402 internals installed now I'm almost done the break in,and i have a very loud tapping noise coming from the engine any idea of what it could be ?

 

Any videos?

 

No don't have any right now but can post some. But any idea without video ?

 

Might be best to contact the person who built the motor... just sayin.

 

more info or video would help us give more input

 

I will post a video , but the only other info i have is the tapping is coming from both sides of the engine while driving or at idle . The 402 build has about 3k on it , the only thing that comes to mind is the Harland sharp rocker arms coming loose ? If that's possible

 

Some things can only be determined in person...waste of forum members time and your time also. When an engine assembly is screwed up you or someone will have to take it apart until you determine the problem...hell of a learning curve though. Good luck.

 

Rockers, lifters, valves even...

 

If it's coming from the side of the block it could be a spun rod bearing. I have the Harland Sharpes on my car and it sounded more like a sewing machine then a knock. Then I spun a rod bearing and could def tell over the sound of the Harland Sharps..

 

Who built the 402?

 

I built it. Why do you ask? I stayed in a Holiday Inn the night before.