[crazeetxn]

Originally Posted by donut

x2 on the cold leak. Warmed up parts expand, leak gone. Warmed up it may still be leaking, just evaporating before you see it.

Had it happen on a chrome water neck that didn't want to seal. Also on the water neck where the rad hose connects, corrosion can build up on the water neck preventing a tight seal on the hose. I seem to have this happen more on OEM necks.

Corrosion I usually clean off with a piece of plumbers cloth, if it's real bad, I'll use a file to get it close, then finish with sandpaper.

Same thing happened to me. Bought the shiny chrome one off the rack. Constantly leaked. More so on the intake manfiold though vs. dripping. Went and bought a cast iron one and no leaks.

Like the others have said, check your weap hole on the water pump and also your pet cock valve.