copy-string 'function'

[T.Jackson]

What is this 'torque' you speak of?

And how tight should it be?

Well, in my humble opinion the only bolts on an engine that need to be tightened to a specific, exact amount of tension are the head bolts. In all other cases 1/4 to 1/2 a turn adequately suffices. Perhaps I'm wrong? I'm not a mechanic, but I am in the process of practically rebuilding a 2001 model, Ford Falcon AU2, XLS UTE.

Trent Jackson

[nomad]

what about the crank bolts? connecting rod end caps? hmm guess it's in the manuel. lol

[T.Jackson]

what about the crank bolts? connecting rod end caps? hmm guess it's in the manuel. lol

I haven't gone that deep into an engine yet. Done things like; head gaskets, water pumps, alternators, starter motors, radiators, heater cores (what a nightmare), brakes, exhausts. You're probably right in saying that there is a few other bolts that should be desirably torqued to (n) ft lbf -- foot pound force.

Trent Jackson

[manwolf]

All bolts have dataheets, all bolts have torque specs. Based on PICBaisc Forum replys all bolts must be torqued.

[T.Jackson]

All bolts have dataheets, all bolts have torque specs.

This is true. Robots need to know this information, therefore engineers will calculate a torque spec. But when a mechanic installs your new starter motor, those bolts will be tightened to approx 1/2 a turn, which is probably about 20 ft lbf at a very wild guess.

Trent Jackson

[Archangel]

Well, in my humble opinion the only bolts on an engine that need to be tightened to a specific, exact amount of tension are the head bolts. In all other cases 1/4 to 1/2 a turn adequately suffices.
Trent Jackson

You could make that assumption, and you would be wrong.

[nomad]

I usually just crank 'em down so they wont come off.

[T.Jackson]

I usually just crank 'em down so they wont come off.

Me too. I think you'll find that to be somewhere between 1/4 to 1/2 of a turn with a decent ratchet.

Trent Jackson

[Archangel]

Hmmm Nomad, you are probably turning bolts of not less than 18mm shank, Big old trucks, likely you are not getting them too tight, maybe not tight enough, Trent, I could argue this with you forever in OFF Topic area, I realize Having been both a Mechanic, and Machinist, engineers are a little over the top with specifications, but there really is some good science used to calculate torque specs. especially in failure prone areas like connecting rod bolts, main bearing bolts, carrier bolts, etc . . .

[rhino]

This is the kind of thread hijacking that turns me and I'm sure others off to this forum. Is it really necessary? Please, if you want to argue into oblivion, do it in your own thread in the Off Topic area.

[skimask]

This is the kind of thread hijacking that turns me and I'm sure others off to this forum. Is it really necessary? Please, if you want to argue into oblivion, do it in your own thread in the Off Topic area.

Refer to Post #3 and the end of Post #8...

[T.Jackson]

You could make that assumption, and you would be wrong.

With regards to 1/4 to 1/2 of a turn I reference to Motorcraft components with what I'm saying. Namely the installation instructions for spark plugs and water pumps.

Trent Jackson