About 1000 miles after my Kraftwerks install, my engine has developed this rattling sound. It's definitely coming from the front of the engine and it's most noticeable around 1800-2000RPM. I initially thought it sounded like a loose blower belt, but adding tension makes no difference. Let me know what you guys think...

 

Does not sound like tct to me.

One quick easy thing to rule out is a serp belt driven component, pully bearing, alternator, water pump, etc. Just remove serp belt, and see if noise is still there. Obviously don't run car very long like this, or it'll overheat.

Don't even need to remove serp belt. Just let it hang without tension from tensioner. It'll take all of 5 min to test this way.

If noise is gone with serp belt inactive, spim each pully by hand to find which one is bad.

 

There is a fast tapping that sounds like TCT frequency.

 

Installed a Billman Gen X TCT tonight and the rattling noise is fixed.