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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 06-28-2020, 04:21 PM
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moosaud1998 moosaud1998 is offline
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Torque Wrenches

What size torque wrench is commonly used on BMW's? And how often will I need to use a torque wrench? I am planning on doing majority of the maintenance on my E90 (water pump, starter etc) and since the bolts are aluminum, it would be smart to invest in a torque wrench, Just not sure which one is most commonly used. 1/2 or 3/8?

1/2 I found on amazon: https://www.amazon.com/gp/product/B0...KIKX0DER&psc=1
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Old 06-28-2020, 04:59 PM
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CALWATERBOY TRE CALWATERBOY TRE is online now
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,

1/2" has greatest versatility though I also use 3/8"

I like Gearwrench electronic....beeps when correct torque is reached and does angle.
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Old 06-28-2020, 05:04 PM
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moosaud1998 moosaud1998 is offline
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Originally Posted by CALWATERBOY TRE View Post
,

1/2" has greatest versatility though I also use 3/8"

I like Gearwrench electronic....beeps when correct torque is reached and does angle.
I was looking at Harbor Freight tools. Both 1/2 and 3/8 have lifetime warranty. So for $15 each, that's a no brainier.
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Old 06-28-2020, 05:23 PM
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CALWATERBOY TRE CALWATERBOY TRE is online now
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Originally Posted by moosaud1998 View Post
I was looking at Harbor Freight tools. Both 1/2 and 3/8 have lifetime warranty. So for $15 each, that's a no brainier.

>Snort< . Well, do they beep?

'Sides which, you now drive a BMW. A level of sophistication and reassuring expense is expected.
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Old 06-28-2020, 05:28 PM
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moosaud1998 moosaud1998 is offline
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Originally Posted by CALWATERBOY TRE View Post
>Snort< . Well, do they beep?

'Sides which, you now drive a BMW. A level of sophistication and reassuring expense is expected.
Just clicks
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Old 06-28-2020, 05:30 PM
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moosaud1998 moosaud1998 is offline
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Originally Posted by CALWATERBOY TRE View Post
>Snort< . Well, do they beep?

'Sides which, you now drive a BMW. A level of sophistication and reassuring expense is expected.
What brand jack and jack stands do you use? If you don't mind me asking
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Old 06-28-2020, 05:51 PM
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What brand jack and jack stands do you use? If you don't mind me asking

Bought jack stands @ Sears when they were in business; others so old don't remember - all 3 ton. Floor jacks at Sears, have a pair.

But I also scored a Bendpak mid-rise lift and in case lift is in the way, I rest tires on 12" Raceramps wheel cribs + pull lift outta the way.


.

Last edited by CALWATERBOY TRE; 06-29-2020 at 07:03 AM.
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Old 06-28-2020, 05:51 PM
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I did one of each. Haven't used the 3/8" all that much on a car, but use it often on motorcycles. Anything less than 30lbs I don't trust to my 1/2", but that one gets used most often. Brand of mine - Craftsman.
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Old 06-28-2020, 06:09 PM
BabyUnicornTaco BabyUnicornTaco is offline
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Big fan of these two. Hard to find one torque wrench for all jobs because of small torque and huge torque requirements. I have done extensive work and these have been great. No worries on size because you can always get an attachment that does not effect functions. Click image for larger version

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Old 06-28-2020, 10:22 PM
08 335Ci 08 335Ci is offline
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The majority of the torque settings on the engine are between 6 ft/lbs (72 in/lbs) to 14 ft/lb (168 in/lbs). A 1/4" in/lb wrench will do 80% of the engine fasteners. The power steering pump is 28 ft/lb so a 3/8" wrench works for that. Wheel lugs are about 100 ft/lb, 1/2" wrench for those.

BMW uses a torque to yield process. Example 12mm head bolts: 28 nm +90 degrees + 90 degrees + 45 degrees. So an angle meter is necessary for the proper torque.

HINT: Not all bolts are aluminum. Some are aluminum coated steel. Those bolts can be reused. A magnet will show which ones are steel. And make sure you get the PROPER Torx drivers and sockets. BMW uses a lot of T8, T11 and T14 sockets and T15, T25 and T27 bits. Don't scrimp on them. A few dollars spent here will save a lot of headaches later.
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Old 06-28-2020, 10:52 PM
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moosaud1998 moosaud1998 is offline
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Quote:
Originally Posted by 08 335Ci View Post
The majority of the torque settings on the engine are between 6 ft/lbs (72 in/lbs) to 14 ft/lb (168 in/lbs). A 1/4" in/lb wrench will do 80% of the engine fasteners. The power steering pump is 28 ft/lb so a 3/8" wrench works for that. Wheel lugs are about 100 ft/lb, 1/2" wrench for those.

BMW uses a torque to yield process. Example 12mm head bolts: 28 nm +90 degrees + 90 degrees + 45 degrees. So an angle meter is necessary for the proper torque.

HINT: Not all bolts are aluminum. Some are aluminum coated steel. Those bolts can be reused. A magnet will show which ones are steel. And make sure you get the PROPER Torx drivers and sockets. BMW uses a lot of T8, T11 and T14 sockets and T15, T25 and T27 bits. Don't scrimp on them. A few dollars spent here will save a lot of headaches later.
I'll also need E torx sockets too, correct?For things like The water pump starter Etc, would I need a 1/2" or 1/4" torque wrench?
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Old 06-28-2020, 10:59 PM
ctuna ctuna is offline
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You need two torque wrenches to cover the Common
fasstners in a BMW correctly. It's a matter of range.
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  #13  
Old 06-28-2020, 11:11 PM
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Originally Posted by ctuna View Post
You need two torque wrenches to cover the Common
fasstners in a BMW correctly. It's a matter of range.
1/2" and a 3/8" correct?
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  #14  
Old 06-29-2020, 04:56 AM
MadJoe MadJoe is offline
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Correct, a 3/8" and 1/2" torque wrench will cover ~90% of all bolts you need to torque on a BMW and 100% of the common ones you'll be torquing. Also you'll want at least 2 E-Torx sets because inevitably you'll misplace one on the set you're using and need to quickly get a stand in until you can do a more thorough search for the missing one. At least that's been my experience

And wheel lug torque is only 88ftlbs +/-2ft/lbs. You absolutely do not need to put more torque on them. As long as you haven't greased your lug bolts up with something like anti-seize they aren't coming off when set at the correct torque, but they can part (break in 2), and/or warp your rotors if you over-torque them too much. I've learned the hard way that it's a great idea to remind any garage that's doing work that requires them to remove a wheel that the torque values are what they are (and then go back and double check when they're done).
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Old 06-29-2020, 05:03 AM
BabyUnicornTaco BabyUnicornTaco is offline
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Originally Posted by moosaud1998 View Post
I'll also need E torx sockets too, correct?For things like The water pump starter Etc, would I need a 1/2" or 1/4" torque wrench?


The lowest value of torque I know of on a BMW is 2nm. Thats low. You will need a nice torx set. There are adapters to change the socket size. Check out these sets. They have been great for me at a great price. Click image for larger version

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https://www.lowes.com/pd/Kobalt-10-P...B&gclsrc=aw.ds

(They make a larger adapter set. This one just for example of what you can buy)


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Old 06-29-2020, 05:19 AM
ppointer ppointer is online now
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+1 on @madjoe reply
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Old 06-29-2020, 07:25 AM
propchef propchef is offline
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Originally Posted by 08 335Ci View Post
The majority of the torque settings on the engine are between 6 ft/lbs (72 in/lbs) to 14 ft/lb (168 in/lbs). A 1/4" in/lb wrench will do 80% of the engine fasteners. The power steering pump is 28 ft/lb so a 3/8" wrench works for that. Wheel lugs are about 100 ft/lb, 1/2" wrench for those.

BMW uses a torque to yield process. Example 12mm head bolts: 28 nm +90 degrees + 90 degrees + 45 degrees. So an angle meter is necessary for the proper torque.

HINT: Not all bolts are aluminum. Some are aluminum coated steel. Those bolts can be reused. A magnet will show which ones are steel. And make sure you get the PROPER Torx drivers and sockets. BMW uses a lot of T8, T11 and T14 sockets and T15, T25 and T27 bits. Don't scrimp on them. A few dollars spent here will save a lot of headaches later.

Im looking for a low value torque wrench right now. Even most 1/4 drive wrenches only go to 10ft/# and I need as low as 7. Any recs?


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  #18  
Old 06-29-2020, 07:30 AM
BabyUnicornTaco BabyUnicornTaco is offline
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Im looking for a low value torque wrench right now. Even most 1/4 drive wrenches only go to 10ft/# and I need as low as 7. Any recs?


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As I posted above. This would suit your needs. EPAuto 1/4-Inch Drive Click... https://www.amazon.com/dp/B01LX4ND65...p_mob_ap_share


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Old 06-29-2020, 08:09 AM
propchef propchef is offline
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Torque Wrenches

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Originally Posted by BabyUnicornTaco View Post
As I posted above. This would suit your needs. EPAuto 1/4-Inch Drive Click... https://www.amazon.com/dp/B01LX4ND65...p_mob_ap_share


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Thanks but sorry, no, I looked at that one. The range is 20-200 which I already have. I need it for far lower values. Im doing a water pump in a 997 and I need values as low as 7ft/lb


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Old 06-29-2020, 08:16 AM
BabyUnicornTaco BabyUnicornTaco is offline
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Torque Wrenches

Quote:
Originally Posted by propchef View Post
Thanks but sorry, no, I looked at that one. The range is 20-200 which I already have. I need it for far lower values. Im doing a water pump in a 997 and I need values as low as 7ft/lb


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7ft/lb = 9.49nm. This wrench is 2.26nm-22.6nm. Your needs are easily within the range.

The 20-200 is for inch lbs not foot lbs.


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Last edited by BabyUnicornTaco; 06-29-2020 at 08:18 AM.
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Old 06-29-2020, 08:20 AM
propchef propchef is offline
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Originally Posted by BabyUnicornTaco View Post
7ft/lb = 9.49nm. This wrench is 2.26nm-22.6nm. Your needs are easily within the range.

The 20-200 is for inch lbs not foot lbs.


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I need to look closer. Greatly appreciated.


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Old 06-29-2020, 08:47 AM
Jim328 Jim328 is offline
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Originally Posted by moosaud1998 View Post
I was looking at Harbor Freight tools..
I purchased a torque wrench from Harbor Freight several years ago.
I was greatly saddened to discover that I had received exactly what I paid for, when the bolt I was tightening sheared off, because the inexpensive torque wrench was not accurate.
Your mileage may vary.

Since then, I've purchased 3; with different torque ranges and sizes at home depot.
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Old 06-29-2020, 09:00 AM
BabyUnicornTaco BabyUnicornTaco is offline
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I purchased a torque wrench from Harbor Freight several years ago.
I was greatly saddened to discover that I had received exactly what I paid for, when the bolt I was tightening sheared off, because the inexpensive torque wrench was not accurate.
Your mileage may vary.

Since then, I've purchased 3; with different torque ranges and sizes at home depot.


Some of that harbor freight stuff is pretty bad. My torque wrenches came with calibration printout numbers specific to the wrench I received. Not just reprinted from what I can tell. There are some ways to test it at home. Like hanging a 10 pound weight from it when the head is in a vise. Some stores even have a calibration station for free. Remember to store them at the lowest setting. Try not to drop them. I also test at half the needed torque to hear the click and then adjust closer or full.


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Old 06-29-2020, 09:13 AM
Patton001 Patton001 is offline
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I was looking at Harbor Freight tools. Both 1/2 and 3/8 have lifetime warranty. So for $15 each, that's a no brainier.
These days you will also find frequent need of a 1/4" that measures inch pounds. None are terribly expensive unless you get into the electronic tools
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Old 06-29-2020, 05:01 PM
08 335Ci 08 335Ci is offline
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Originally Posted by propchef View Post
Im looking for a low value torque wrench right now. Even most 1/4 drive wrenches only go to 10ft/# and I need as low as 7. Any recs?
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I picked up this one off Amazon I checked it against my 3/8" Snap On wrench and it was right on.

The only thing I don't like is if you're not careful the friction lock loosens and your set value changes plus the ft/lb scale is a little hard to use so I just convert to in/lbs. 1 ft/lb = 12 in/lb.
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