torque sequences

[Dooley]

Alot of questions about this lately here are some pics.

These are for 60's and beyond blocks no real early stuff.

[Dooley]

Hemi

[Dooley]

chrysler

[Dooley]

buick

[Petejoe]

flathead torques found here
flathead head torques (http://www.vanpeltsales.com/FH_web/flathead_cylinderhead_torque-specs.htm)

[atch]

can anyone put up the nailhead buick sequence here? (i'm assuming that the buick shown above is a v-6)

[Scotch]

While most of us will be able to plan ahead enough prior to torquing fasteners to get an appropriate chart, there comes a time in every gearheads life when you're stuck without a map.

In cases like these, there is a backyard way of torquing fasteners in order that will work regardless of make or design.

The basic premise behind torquing things in order is to gradually stretch the fasteners at the same rate from the center outward, thus applying equal clamping force across the surface of the part in question.

For this reason, any cylinder head or part requiring torque in pattern can be tightened effectively if the techician follows a circular pattern spiraling outward from the center of the part. Start with the most centrally-located fastener, and work in an ever-growing circle until all the fasteners are at the specified torque.

I also torque heads in 3 steps. I simply divide the final torque specification by 3 and work in stages. If the final torque is 60 ft-lbs, I'll go 20-40-60. In fact, if the final torque spec is anywhere in the 60 ft-lb range, I'll still go 20-40, then finish with the spec. These steps do not have to be precise. 20-40-65 works just fine.

If you don't have a chart, and you must get the work done, this technique will most certainly work for ya. If you look at any torque chart, you will see this same basic pattern over and over again.

I also recommend numbering the bolt heads before starting. I use White-Out since its easy to see.

Scotch~!

[TagMan]

atch,
Glad to help. Here's the torque sequence for a 364/401/425 nailhead, from the 1965 Service Manual. The small block nailheads (264/322) have a different sequence.
-Bob

http://home.rochester.rr.com/mrplates/401trq.jpg