Tightening torque values

[elansprint71]

Any questions of this nature should be definitively resolved by Carroll Smith's Nuts, Bolts, Fasteners and Plumbing Handbook, infamously known as "Screw to Win."

Great book, had it for years; best not to keep it bedside though.

As an aside; maybe it's because I served my time as a Toolmaker... and thereby had lots of "stuff" drummed into me... I only ever reach for the torque wrench when doing head bolts, con-rod bolts, bearing caps and that thingy on my Honda lawn-mower; the rest is done by feel and always only ever using the correct length of spanner.
Have to confess that something once came adrift on the fast cycle in my Hotpoint washing-machine though, when it did it's best to put a bolt thro' the casing. I blamed Margaret Thatcher at the time. Bitch.

[bcmc33]

As an aside; maybe it's because I served my time as a Toolmaker... and thereby had lots of "stuff" drummed into me... I only ever reach for the torque wrench when doing head bolts, con-rod bolts, bearing caps and that thingy on my Honda lawn-mower; the rest is done by feel and always only ever using the correct length of spanner.

Same background - same teachings to a point:)

My teachings taught me not to use bolts for high tensile applications where studs could be fitted. It was good to see that the ARP experts are clearly of the same opinion as they sell only studs for cylinder heads and bearing caps for the Twin Cam.

[billwill]

My teachings taught me not to use bolts for high tensile applications where studs could be fitted. It was good to see that the ARP experts are clearly of the same opinion as they sell only studs for cylinder heads and bearing caps for the Twin Cam.

That's one I've not come across. What is the reasoning behind that?

[bcmc33]

My teachings taught me not to use bolts for high tensile applications where studs could be fitted. It was good to see that the ARP experts are clearly of the same opinion as they sell only studs for cylinder heads and bearing caps for the Twin Cam.

That's one I've not come across. What is the reasoning behind that?

I've only ever used studs for main bearing and cylinder heads from the time of my old Cooper "S" and S2 Twin Cam engines due to my custom and practice based on my engineering training. In previous lifetimes I had the influence to get them made to simulate grade 10.9 standard.
However, it was only when I read the ARP catalog a couple of years ago did I fully "remember" the reason why studs are better than bolts for these type of applications.
I think I eluded earlier to my teachings that were very good, but my ability to remember the full reasons behind the important bits that stick in the mind is somewhat flawed.

IIRC, ARP sell only studs for the Twin Cam headand main bearings.
For full information, I recommend that you download and read the ARP catalog.