Meissen's LT1 Build-up Thread

[Phantom409]

Can I send you my want list so I can get parts

[JoeliusZ28]

Making me jealous with all these parts you've ben buying. Also good call on the head bolts that would have been a major disaster.

thats one of those things thats easy to forget about and could have been bad.

[98blackbeauty]

Target date is put the engine in now July 14th. Just kidding but the way he keeps buying more "stuff" makes me wonder. I would like to get engine in this weekend 3/21. then finish up connections and fire up on 3/28. then run over get front end alignment done, then run it up to Steve to tune 3/28 or 3/29. Then pick up from Steve when he's done hopefully by 4/8/2009. That is if it don't rain and the creek don't rise.

[meissen]

Definitely - that's one thing that we're having fun with is that we're pretty much winging it. If we get stuck, then yeah I google and look up information but reusing a bolt never in a million years would I have known that I couldn't reuse it. Guess I should've known when it had that really stupid torque method - "Torque it to barely anything, and then turn the torque wrench X degrees" I was like WTF? Just give me a friggen ft/lbs to torque it to and be done with it.


And yeah, I'll throw up the this weekend's post right now for the weekend so everyone knows for sure.

[Phantom409]

Looks like you better get to work then Larry

[my95z28]

K, time to make myself look stupid, what is torque to yield?

[DETROITMUSCLE]

I believe it just means that the bolts are torqued until they stretch making them not reusable

[MP81]

K, time to make myself look stupid, what is torque to yield?

One use.

Tighten all to torque in sequence. Turn 90* in sequence, Turn another 90* in sequence.

They're tightened past their elastic region, into the plastic region and do not return to their original length after being torqued.

http://www.robbos.com.au/myweb/Tech_Bolts.htm

[my95z28]

When do you stop torquing them? When you can't go anymore?

[meissen]

Yeah, it's really stupid how they're torqued down. First you go through and torque all the head bolts down in sequence with a really freaking light torque rating IIRC. Then you go through each bolt again and turn the bolts like 145 degrees or something like that (on the LT1) - kinda annoying when you're reading torque specs and then see "turn 145 degrees" Once you turn the X degrees, you're done.

[DETROITMUSCLE]

Yeah thats the easy way to do it, because technically your suppoed to use a torque angle gauge and do it that way.

[JoeliusZ28]

Yeah, it's really stupid how they're torqued down. First you go through and torque all the head bolts down in sequence with a really freaking light torque rating IIRC. Then you go through each bolt again and turn the bolts like 145 degrees or something like that (on the LT1) - kinda annoying when you're reading torque specs and then see "turn 145 degrees" Once you turn the X degrees, you're done.

its actually not a stupid method at all. The sequence is not only for the bolts, but to insure that the gasket is properly compressed. if you torque one side all at once, theres a good chance youre going to have a leak, or blow a head gasket in no time.

[MP81]

Yeah thats the easy way to do it, because technically your suppoed to use a torque angle gauge and do it that way.

[meissen]

its actually not a stupid method at all. The sequence is not only for the bolts, but to insure that the gasket is properly compressed. if you torque one side all at once, theres a good chance youre going to have a leak, or blow a head gasket in no time.

Oh no, I understand the method of going through an order of torquing the bolts to ensure that the compression is even, but they still could have given me a solid ft/lb to tighten to without having the angular degree to torque after putting it to a ft/lb... does that make sense? Not sure if I'm describing it correctly.

Instead of:
Torque all bolts in order down to 33ft/lb
Repeat same order, turn an additional 145 degrees

Do:
Torque all bolts in order down to 100ft/lb

That's what I mean.

[MP81]

It's to provide the extra stretch once all bolts are seated fully. Dunno why they wouldn't just use another torque stage, though...