I have never lubed the threads on headbolts in all the years I have been rebuilding engines. You will get a different torque reading between wet/dry threads. I also skimed over the FSM and no where in it does it say to lube the threads on the headbolts. Just an FYI.
>>>*I do understand that everyone has their way, if it works, don't change. But I say to lube the threads with normal motor oil. The bolt hole threads should be chased out, also (NOT tapped!)..We use an old head bolt, and cut a groove with a hacksaw, they make a perfect chaser.
Then be sure the bolt hole is cleansed completely, note using compressed air without FAIL will get you in the eye so use safety glasses...
*Ask me how I know....*LOL**
THEN: lightly oil the threads, DO NOT install them dry, that simply INCREASES friction and contributes to false torque readings...Just MHO, I HATE to redo anything....A slight overtorque normally hurts nothing, an undertorque creates "defective" head gaskets.....
Spin the bolt in all the way and back out with your fingers, if the bolt feels sticky at any point you WILL have a false torque reading. If you feel that, rechase and reclean them.
Then install the bolts, snug them to 50%, back them off 1/4 turn...Yes in sequence. Do NOT be in a hurry here, you are saving yourself time and troubles. Then to 75%, back off 1/4 turn, then 100% and good to go. (Yes, even with used head bolts, unless you DID reinstall each bolt in it's original position using an unsurfaced head and block???)
All we are doing here is mating thread imperfections, they are always there.
Remember to retorque with the engine warm, if you got her right, none of them will move...PIA, do it anyway, if you do you eliminate a few hours of work in a few weeks or months down the road...
*Shortcuts? No prob, they take a tad more time and cost a tad more money...No prob, you DO have a cell phone, right?
Someone will probably come and get you....:)
Recheck hot after runin when you adjust the valves for the final setting. Uniform and even clamping forces means that 10 years from now you are still starting her up and going down the road, uneven means that the head gasket was "defective" and you don't get to go fishing that weekend.
One discovery we made, the 58# the factory calls for is fine for the composition gasket (asbestos impregnated) used originally by the factory. The new 10.9 grade bolts out now call for 64#, because most quality suppliers are now selling the new metal lined gaskets. The older style composition also work fine, too, the new stuff is just better. Even most Toyota dealerships now supply the new metal lined piece, those are pretty good gaskets..
But the metal lined gaskets (NOT MLS, different stuff there) are needing a bit more clamping force to compress properly, I discovered this while testing some items.. Note here I am old and could be wrong but I ain't...
Gasket failure using these procedures are almost unheard of unless some kind of upset condition exists, in which case it will fail no matter what you do. In fact, the gasket is the weak link, designed to fail in upset/mis-tuned conditions, and save other expensive engine parts......*EB