How to torque head bolts G148B (480B)

Thanks for any advice!

-RC

This is George Md"s pic from the archives.

Joe

The original tool was an offset extension (pic). Note that the offset on both ends is the same length so there is no leverage to screw up the torque as would be the case using a universal.

This extension fits the G148 engine (and others) that was superseded by the G148B, 1/2" drive x 11/16" box end. Snap-on p/n S8663B, I don"t think they are available anymore from Snap-on.

George Md posted a pic of some torque extensions made up of welded wrench pieces awhile back that would work just fine. The key is to get the offset on both ends the same length for an accurate torque.

Joe

On a vertical fastener the center of the torque wrench drive must be perfectly perpendicular to the center of the fastener for accurate torque.

If you want to use the crowsfoot w/o an equal offset you need to calculate the leverage. There are several sites that have basic calculations for that, do a goggle search.

Joe

But, I could be misreading/misunderstanding and quite possible that the sites could be mistaken.

Here is a site that proves you are right by using the calculator.

I am old but I can still learn if you beat on my head hard enough.

Joe

• Crowfoot torque