They make silicone especially for cooling systems. Can't remember brand I use, but is blue color. Tried to bump up my O rings with silicone because mating surfaces had some pitting. Was collosal pain in rear to keep O rings in seats as pipe lowered in place (remember -- you've also got forward movement as it slides into hose). Silicone kept grabbing O rings and pulling them out. Eventually cleaned most of it off. Moral of story -- a little dab'll do ya... Did you replace heater core takeoff behind (under) distributor? If you do: MARK THE ROTOR. Was end of long day and I didn't feel like going back into house to get a marker. Tried to be a big man and remember position. Of course got it a tooth off. Tear everything back off... Bill Robertson #5939 >--- In dmcnews@xxxxxxxxxxxxxxx, "James LaLonde <deloreandmcxii@xxxx>" <deloreandmcxii@xxxx> wrote: > Yay! I'm all done replacing the waterpump and I started the car! > Yay! other than a jump start it started and ran better than ever! > Yay! it's leaking coolant like... something that leaks alot of > coolant. > > no wait... that's not a yay.... that's a boo. > > Boo! it's leaking coolant like... something that leaks alot of > coolant. > > So, stupid me, accidentally pinched an o-ring on the internal > waterpipe to the block without realizing... and reassembled the > whole dang thing. Well I got it all back disassembled... again. > > Call me a dumb@$$... > it is safe/worthwhile to put a thin stripe of RTV sealant (silicone) > around the o-ring... or some liquid gasket, to help hold the ring in > place while putting on the water-pipe, and help seal it later? Can > that stuff take the kind of temperatures I'm sure exist down in that > hell between the intake mani. and block? > > Thank you, thank you very much! > > I learned that no mater how carefully you do every step in such a > big/lengthy job.... you will F it up somewhere. > > James L 4009