Quote:
Originally Posted by cnk
You should never torque anything with an impact, only a torque wrench. Also, just because you torque something to 150 doesn't mean that it will only take 150 to remove it. Factor in time, rust, etc. and it can take a lot more to remove. I have the M12 Fuel 3/8", m18 Fuel 3/8", and the M18 Fuel 1/2" high torque and there are some things that you just need the high torque impact for such as axle nuts or crankshaft bolts (on Honda cars especially). After last winter, the M18 3/8" wouldn't take the lugs off, but the high torque took them off without issue. That's after a winter with lots of snow and salted roads.
Go read up on the garagejournal.com forums and you'll see all reviews on any impact you want.
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I never said anything about torquing fasteners with an impact. As for your 3/8" M18 not removing your lug nuts after a winter of driving, I think you need a new one. Either that or you never rotated your tires and ensured the threads were clean. Our cars call for 89 ft-lbs if I remember correctly.
The newer m18 3/8" impact is good for
most applications that your average car owner would do.
I do know that torquing something to 150 ft-lbs will result in needing more then that amount of torque to remove it, I have experienced this more then enough times from Maine winters and working on ships.
If you have a stubborn bolt or nut a penetrating fluid followed by a proper breaker bar is the correct way to remove it. Grabbing a highly over powered impact for the job will result in stripped threads.
As for having 1/2" drive tools already I recommend getting an adapter to go from 3/8 to 1/2. The nice thing about 3/8 is the sockets are usually slightly slimmer and shorter allowing easier access.