Coolant weep around head nut

[katy]

Originally Posted by mcgarrett

Noticed coolant weeping around the head nut nearest to the 3 and 4 spark plugs. With the engine running, I could see slight bubbling from the threads. I tried tightening the nut slightly, but didn't want to over-tighten. All head nuts are at 55 lbs. Is there a remedy besides pulling the head? What about block sealer?

Remember that when checking head nut torque to back the nut off ~90° before re-tightening to check torque. Some people index mark the nut and the head before loosening the nut, to see if the "re-torquing" changes the setting.