Finally got this 76 930 engine back in and running (thanks to those that helped me overcome other issues). After about 45 miles, I now hear this gawdawful noise coming from the engine. Occasionally goes away-seems to lesson as the engine warms. At first I thought it was a loose timing chain or the fan bearing. This engine has the hydraulic chain tensioner upgrade.
I pulled the timing chain covers off to look at the tensioners/chain, but both looked good and tight. I can't move the tensioners in our out with my hand alone, but can by prying with a screw driver, but they're pretty stiff. Nothing is loose. I turned the engine by hand and can't hear anything dragging.
Unless someone has an idea, I guess my next step is to remove the valve covers for an inspection, and then pull the engine the rest of the way out and dive back into the case.
Listen to it:
https://www.youtube.com/watch?v=SgYtetX1QSs&feature=youtu.be
Thanks for any help,
Bob