Very timely for this thread to be bumped to the top. I can add my recent experience:
-On my recent 2.7 build, I used Henry's Threebond x2/Loctite 574/Curil T method. This really worked out well, I am very pleased with the results. In the course of planning the build, I've talked to a few pro builders who really like the Threebond as a case seam sealant as well. Good enough for me. Having said that, my engine assembled with 574 is pretty dry.
-This time around, I did NOT use Curil T on the crank snout or flywheel seals. So far, both are dry. They were much easier to install WITHOUT the Curil T. When using the Curil, the seals very effectively walk themselves out of their seated positions unless I pin them down overnight. Maybe I have been using too much of it? Dunno, but I'm done with it on crank seals. I did use the Curil T on my cylinder base gaskets, breather gasket, cam thrust plate gaskets & o-rings, etc. I think that's about it.
MCA/Craig - if you've got the sealants you need and want to proceed with your build, here's a tip. Assemble the bottom end without ANY through-bolt o-rings. If you're assembling alone, this really helps you to get the case together quickly. When you're happy with the completed bottom end assembly, you can then remove your through-bolts and install the o-rings - one at a time. Remove bolt, install o-rings, reinstall bolt, torque to spec, then move on to the next bolt, and so forth (in the torque sequence, if you're really being anal - I do/am), until all o-rings are installed.
It is easier to get confused about what bolts have been ringed and which haven't this way. Not only do I pre-count my o-rings twice to make sure I start with the right number, but I also mark each acorn nut with an 'X' using a Sharpie after installing the o-rings and re-torquing. If all the nuts have 'X's and I am out of o-rings, then I think I'm in good shape
. Having done several builds with both the blue and green o-rings, I would say hold out for the green ones, no question. They really fit much better. I don't think I've ever had a green one 'squeeze out' from under the washer like I almost always had with the blue ones.