1/4" automotive torque

[rick carpenter]

How much torque do I typically need for 1/4" automotive applications? If I need more than the 30-40 ft/lbs ratchet wrenches deliver, I'll stick with the impact driver I have and use adapter extensions. The design of ratchet wrenches is better for tight quarters tho.

 

[CGarage]

It’s rare to need an impact driver that is 1/4” unless you are removing corroded fasteners in something like an exhaust system.....and you live in an area where road salt is used. I’d stick to a low tooth count ratchet or get a long ratchet that is 1/4”.
And before I would use a ratchet, invest in a breaker bar. I use a 1/4” drive breaker bar from time to time. All are better choices than an impact and you should use less tool than you need to start- *always*

 

[2ndGearRubber]

Typical torque values are 60-140 in/lb, so like 13 ft/lbs. In context, that's about the average spark plug torque, and a little less than a drain plug. For instance on a modern GM "LS" style V8, drain plug torque is 18ft/lb, spark plugs are 13 IIRC.

What it takes to remove, is an entirely different story. My m12 fuel ratchet is reliable for basically all m6 fasteners, and a good percentage of m8 that aren't rotted or corroded. The M12 fuel impact driver loses to m6 fasteners from time to time.

 

[noid]

https://rtstools.com/wp-content/uploads/2020/10/Torquechartv2.pdf

 

[Badgerstate]

Id say it really depends upon the bolt and the application. I cant imagine needing to use an impact for anything that falls in the 1/4" range. I mean, Ive got a 3/8 impact and sometimes I think its quite silly for the drive size but its nice to have when you need it and when the 1/2 is either way too much power or simply too big to fit.