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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 03-02-2014, 11:15 PM
Bigrob126 Bigrob126 is offline
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Inch pounds

This seems like it should be easy, but I'm getting 2 different answers...so I am asking. Our oil drain plug requires 18 foot lbs of torque. My foot lb torque wrench is too long to maneuver, so I use my shorter inch lb wrench. I would think that inch pounds would be 10 times what foot lbs would be. Hence 18 foot lbs should convert to 180 inch lbs....and some websites agree with what I am saying. But some websites say that's not the case. One site says 18 foot lbs converts to 216 inch lbs. so which one is correct?
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  #2  
Old 03-02-2014, 11:27 PM
anE934fun anE934fun is offline
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Try using 1 to 12 conversion factor. Last I checked, there were 12 inches in a foot.
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Old 03-02-2014, 11:30 PM
Dave @nz Dave @nz is offline
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Hi,
216 is the correct answer, the calculation is 12 inches =1foot therefore 18 ftlbs x 12 =216 inch pounds.
Hop this helps.
Dave.
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  #4  
Old 03-02-2014, 11:34 PM
Bigrob126 Bigrob126 is offline
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Originally Posted by Dave @nz View Post
Hi,
216 is the correct answer, the calculation is 12 inches =1foot therefore 18 ftlbs x 12 =216 inch pounds.
Hop this helps.
Dave.
That makes perfect sense, so why am I using multiples of 10 and not 12?.....I don't know either! Nothing like over thinking an easy one! Evidently there are others think like me! Thanks!
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Last edited by Bigrob126; 03-02-2014 at 11:37 PM.
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  #5  
Old 03-02-2014, 11:38 PM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by anE934fun View Post
Try using 1 to 12 conversion factor. Last I checked, there were 12 inches in a foot.

Well, I just checked, and I got 10" feet!

Now look, anE934fun, there's gotta be some leeway here. I'm a tall boy and most guys, certainly my wife, got less than 10" fer sure!
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  #6  
Old 03-02-2014, 11:42 PM
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CALWATERBOY CALWATERBOY is offline
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.

Uhhh, not that my wife's a guy.

Dammit! San Francisco....ya'll come out for the love parade. Dang! Another bit o'unintentional amusement. Can't say nuthin' tonight.
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  #7  
Old 03-02-2014, 11:49 PM
CitizenOfDreams CitizenOfDreams is offline
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Originally Posted by Bigrob126 View Post
That makes perfect sense, so why am I using multiples of 10 and not 12?.....
Because decimal units of measurement are much more natural for people who use the base 10 numeral system. One day Americans will realize that and do away with gallons/quarts (4:1), pounds/ounces (16:1) and miles/feet (5280:1, wtf?).

Oh, and get rid of degrees Fahrenheit while you are at it. And today is 2014-03-03, not "03/03/14". And the time is 02:48, not "2:48 AM".
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  #8  
Old 03-03-2014, 06:31 AM
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///M-ratedE90 ///M-ratedE90 is offline
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Quote:
Originally Posted by Bigrob126 View Post
This seems like it should be easy, but I'm getting 2 different answers...so I am asking. Our oil drain plug requires 18 foot lbs of torque. My foot lb torque wrench is too long to maneuver, so I use my shorter inch lb wrench. I would think that inch pounds would be 10 times what foot lbs would be. Hence 18 foot lbs should convert to 180 inch lbs....and some websites agree with what I am saying. But some websites say that's not the case. One site says 18 foot lbs converts to 216 inch lbs. so which one is correct?
The other way of doing it, according to a well known garage manager that frequents the boards is "finger torque", "wrist torque", "elbow torque" and "shoulder torque" depending on which muscles are engaged in the twisting...18 lb.ft is "finger torque". The torque wrench scale with the amount of touch you need. It is about 20ft.lb per joint closer to your shoulder.

[However, don't blame me if your sump plug falls out, drains all the oil and the engine seizes ]

[This should get the board juices flowing for a while]
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Last edited by ///M-ratedE90; 03-03-2014 at 06:33 AM.
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  #9  
Old 03-03-2014, 06:37 AM
CitizenOfDreams CitizenOfDreams is offline
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Originally Posted by ///M-ratedE90 View Post
The other way of doing it, according to a well known garage manager that frequents the boards is "finger torque", "wrist torque", "elbow torque" and "shoulder torque" depending on which muscles are engaged in the twisting...
The most common method is "torque it till it strips, then back off quarter turn".
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  #10  
Old 03-03-2014, 06:57 AM
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Chris90 Chris90 is offline
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Quote:
Originally Posted by Bigrob126 View Post
This seems like it should be easy, but I'm getting 2 different answers...so I am asking. Our oil drain plug requires 18 foot lbs of torque. My foot lb torque wrench is too long to maneuver, so I use my shorter inch lb wrench. I would think that inch pounds would be 10 times what foot lbs would be. Hence 18 foot lbs should convert to 180 inch lbs....and some websites agree with what I am saying. But some websites say that's not the case. One site says 18 foot lbs converts to 216 inch lbs. so which one is correct?
You're a UNLV graduate I take it?
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  #11  
Old 03-03-2014, 07:14 AM
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For a simple question of torque, this certainly provoked a lot of twisted replies.
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  #12  
Old 03-03-2014, 07:27 AM
jburke4689 jburke4689 is offline
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German/Austrian vehicle ownership has mad me OCD on torque. Doing work on my 335i and find that a lot of engine torques are between 7 and 15 foot pounds made me realize I can't tighten anything on it without a torque wrench. my muscle memory had me tightening everything to about 90 foot pounds. I have two SeaDoos and the problem is the same. Engines made in Austria and torques generally below 15 foot pounds however there is judicious use of expensive Loctite products. I don't see much requirment for that stuff in our BMW manual.

To answer the question though, it is a 1:12 conversion.
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Old 03-03-2014, 07:42 AM
Ml3456 Ml3456 is offline
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This post is sounding more like a 5th grade math lesson all the time!!
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  #14  
Old 03-03-2014, 10:30 AM
anE934fun anE934fun is offline
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Quote:
Originally Posted by CitizenOfDreams View Post
The most common method is "torque it till it strips, then back off quarter turn".
But then the bolt is stripped, and the whole exercise is useless.
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Old 03-03-2014, 10:33 AM
anE934fun anE934fun is offline
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Originally Posted by CALWATERBOY View Post
Well, I just checked, and I got 10" feet!

Now look, anE934fun, there's gotta be some leeway here. I'm a tall boy and most guys, certainly my wife, got less than 10" fer sure!
You, your wife and a bunch of others (me included) don't have standard feet....
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Old 03-03-2014, 10:35 AM
CitizenOfDreams CitizenOfDreams is offline
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But then the bolt is stripped, and the whole exercise is useless.
But the car's owner won't find out till after he pays the mechanic. So all is good.
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  #17  
Old 03-03-2014, 11:18 AM
jburke4689 jburke4689 is offline
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but then the bolt is stripped, and the whole exercise is useless.
sarcasm
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Old 03-03-2014, 11:59 AM
ashewb ashewb is offline
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huh, my deal extreme "tork toolz" read in fig newtons . go figure
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  #19  
Old 03-03-2014, 12:04 PM
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DSXMachina DSXMachina is offline
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Quote:
Originally Posted by ///M-ratedE90 View Post
The other way of doing it, according to a well known garage manager that frequents the boards is "finger torque", "wrist torque", "elbow torque" and "shoulder torque" depending on which muscles are engaged in the twisting...18 lb.ft is "finger torque". The torque wrench scale with the amount of touch you need. It is about 20ft.lb per joint closer to your shoulder.

[However, don't blame me if your sump plug falls out, drains all the oil and the engine seizes ]

[This should get the board juices flowing for a while]
You forgot 'leg torque'. That's applicable to the crank damper pulley, and the front axle nuts on all-wheel and front wheel drive cars.
At one time there was another interval between shoulder torque and leg torque called back torque. OSHA does not allow us to use that any longer, and if we have to put on a brace we might as well just grab a torque wrench.
BTW, 18ft. lbs. (24.4 fig newtons) is wrist torque, not finger torque.

Last edited by DSXMachina; 03-03-2014 at 12:08 PM.
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  #20  
Old 03-03-2014, 12:43 PM
timthepug timthepug is offline
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let me think on this for a moment

http://en.wikipedia.org/wiki/Moment_(physics))

Last edited by timthepug; 03-03-2014 at 12:44 PM.
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  #21  
Old 03-03-2014, 12:51 PM
ashewb ashewb is offline
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and only slightly related, given the situation in Crimea, can the nav be reset in "leagues " ? never know, could come in handy and there might be a new sweater in it .
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  #22  
Old 03-03-2014, 01:56 PM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by DSXMachina View Post
You forgot 'leg torque'. That's applicable to the crank damper pulley, and the front axle nuts on all-wheel and front wheel drive cars.
At one time there was another interval between shoulder torque and leg torque called back torque. OSHA does not allow us to use that any longer, and if we have to put on a brace we might as well just grab a torque wrench.
BTW, 18ft. lbs. (24.4 fig newtons) is wrist torque, not finger torque.

You're givin' me Jaw Torque
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  #23  
Old 03-03-2014, 03:57 PM
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BB_cuda BB_cuda is offline
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and only slightly related, given the situation in Crimea, can the nav be reset in "leagues " ? never know, could come in handy and there might be a new sweater in it .
Only if you're taking the 3 series for a scuba dive
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  #24  
Old 03-03-2014, 05:26 PM
ashewb ashewb is offline
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Only if you're taking the 3 series for a scuba dive
nah, wasn't thinking 'bout 20k of em, maybe just a half of one at a time or 10. might be a neat hat in it too
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Old 03-03-2014, 05:45 PM
ddeliber ddeliber is online now
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nah, wasn't thinking 'bout 20k of em, maybe just a half of one at a time or 10. might be a neat hat in it too
Half a league, half a league, Half a league onward, All in the valley of Death Rode the six hundred.
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