Anti-seize vs grease vs Loctite

[EricTyrrell]

When re-assembling an engine/bay when does one use anti-seize, grease, or loctite on nuts/bolts?

[psykokid]

anti sieze on things like studs into the block or where you have two dissimilar metals coming together (steel/aluminum) loctite on things you dont want to vibrate loose.

[Disco Mike]

For new head bolts the idle thing is head bolt thread lubricant for more accurate torque settings.

[psykokid]

i know when installing something like ARP head studs they have two torque values listed in the instructions, one with lube and one with out.. One thing i dont like about using arp head studs is the need to re-tourque after X miles.. I'd much rather use good stretch bolts and be done with it.. that last half a turn on any motor i've put together is always scary..

[EricTyrrell]

Really I don't want anything to vibrate loose, but I also don't want the threads to seize up for various reasons. I realize the head bolts are a special and sensitive case, but so far I've been using anti-seize on most parts like the trans plug, sump, starter, etc. Seems there's advantages/disadvantages either way.

[antichrist]

The manual identifies which fasteners should get loctite, and which loctite should be used.
I use Never Seez on things like exhaust manifolds. Definitely on spark plugs.
You shouldn't need it on oil pan fixings and the like.