I have a D6 9U with 1800 hours on it.
After running for several hours today I noticed it seeps a little
in a couple spots. What, if any, interval should the head be retorqued at?
If so what is that torque spec and bolt sequence?
Or am I just getting too picky?
Thanks in advance for your help.

www.acmoc.org/ACMOC_BB/showthread.php?t=4139

Lots of the D318 heads seep along the sides. Recommendation is to seal the gasket with a brush on sealer instead of relying on the ferrules and packings to seal it.

Wouldn't hurt to do it, you would loosen each bolt in turn and retorque. If you found any that would move without loosening them first after having been properly torqued the first time, I would be surprised.

I would also be surprised if it stopped the seeping.

I have put so many of them together and I (we) at the Cat dealer used the old reliable #2 permatex and never leaked after that. Yes it was a problem esp. with the longer D318 engine used in the D6 and others or industrial engines.