Originally Posted By: SumpChump
So AITG, as long as I PUSH to torque even though horizontal to the earth surface...I will be ok?
What would be in error would be to PULL the wrench? If un understand correctly.
It is good that you understand torque and proper tool usage. Why bother using a good tool if you don't use it correctly (garbage in/garbage out)?? I see many people assume that because they are using a torque wrench, no matter how bad the technique is, they will get good results. WRONG
- Remember that the accuracy and precision needed varies on the job at hand. Spark plugs, wheel lugs, oil plugs are important to be close enough. Head gasket fasteners need to be more accurate and more even/equal. Space shuttle fasteners.........
- Fastener condition and prep? Lube vs. dry? This gets more critical as the job becomes more critical described above. But, people even debate lube/antiseize on wheel lugs and spark plugs. Research and make your own decision, because there is no consensus.
- The 30% rule (you've been studying)? This is the established engineering +/- variance possible with a calibrated wrench due to many variables: fastener coating/condition/lube, and on and on. Tool errors. User errors, etc.. Quibbling about 3% vs. 4% new wrench accuracy is moot.
FYI, with my last new vehicle (1.5 years old), the factory torque spec. for the oil pan bolt is 20 ft. lbs.. Curious about clean vs. oiled (impossible not to have dripping), I put a mark on the OEM factory bolt, removed it, then reinserted and torqued it to 20 ft. lbs (oily). The mark lined up, telling me that oiled threads didn't matter in this case. With head bolts, I would follow mfg. instructions.
ALL torque wrench mfg. recommend to PULL the handle vs. PUSHING it. I think this is to ONLY prevent injury should something slip, but I am all ears if someone has a better answer.
As stated by others, use the wrench in any position, but make sure you are pulling perpendicular (right angle) to the FASTENER, not "horizontal to earth", etc.. Don't pull in all twisted and contorted directions.
Don't over think this, but it is commendable to learn correct, basic technique vs. the gorilla method.
I, too, don't understand the "finger tight", "tight as can get" recommendations. I can (have) snap off lug bolts with a 18 inch breaker bar. "tight as can get" must be for very old or weenie types, LOL.
