Recent Topics
Castrol Edge LL IV 0w20, not majority PAO
by wemay - 06/05/20 09:08 PM
Fram Titanium 20k mile oil filters at AAP....
by bbhero - 06/05/20 09:04 PM
D-Day 🇺🇸
by kstanf150 - 06/05/20 08:57 PM
Husqvarna 5.2 ounce 2 stroke oil .39 ymmv
by maintenanceMan - 06/05/20 08:53 PM
Mobil 1 Permazone
by maverickfhs - 06/05/20 07:47 PM
2 stroke oil
by opus - 06/05/20 06:19 PM
McKinney Falls State Park - Austin, TX
by wwillson - 06/05/20 05:22 PM
Gen 5 Rams (2019+)
by The Critic - 06/05/20 05:03 PM
CarQuest R95140 Cut Open
by HX520W - 06/05/20 04:47 PM
2012 Tacoma steering very stiff?
by wagsrk08 - 06/05/20 04:44 PM
"Quick change" sabotage episode
by Kira - 06/05/20 04:40 PM
Two Motorcraft FL400S Filters Cut Open
by HX520W - 06/05/20 04:36 PM
VIN character that designates engine
by grampi - 06/05/20 04:35 PM
Two WIX 57356XP Filters Cut Open
by HX520W - 06/05/20 04:17 PM
Blue lights on Uber vehicles
by John_Conrad - 06/05/20 04:08 PM
2015 RAM EcoDiesel 3.0L, 5,354mi, M1 TDT 5w40
by SavagePatch - 06/05/20 03:18 PM
2014 5.7 Charger UOA
by Bob D - 06/05/20 02:42 PM
Mazda 3 1.6 DV6C UOA Low TBN Qeustion
by mossietheno1 - 06/05/20 01:59 PM
CRJ-550
by dja4260 - 06/05/20 01:46 PM
Newest Members
3Dperf, LouK2, Michael328i, tyman, Knot_A_Mekanik
71616 Registered Users
Who's Online Now
94 registered members (2015_PSD, 3Dperf, 01rangerxl, 10WSmuckers, 55hambone, 77GrandPrix, 11 invisible), 1,715 guests, and 26 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics306,269
Posts5,289,306
Members71,616
Most Online4,538
Jan 20th, 2020
Donate to BITOG
Print Thread
Hop To
Page 1 of 2 1 2
Torque wrench max question... #5430472 05/16/20 08:21 AM
Joined: Dec 2015
Posts: 42
O
Oey12 Offline OP
OP Offline
O
Joined: Dec 2015
Posts: 42
I have a CDI torque wrench that is capable max of a 100ft pounds. Recently I purchased a Toyota Tundra that requires 97ft pounds for the lug nut torque. Should I upgrade to a larger capacity wrench or is my current one sufficient? The only reason I am asking is because I read somewhere years ago that when you get to the max torque specs it’s not as accurate... And I cringe at the idea of the dealership or mechanic using a impact gun to tighten. My step dad lost a tire on a suburban doing 70 one time...no thank you.

Re: Torque wrench max question... [Re: Oey12] #5430478 05/16/20 08:25 AM
Joined: Nov 2008
Posts: 16,068
S
supton Offline
Offline
S
Joined: Nov 2008
Posts: 16,068
I've read to not use in 10% from either end. Maybe it 20%...

But on my Tundra I use my 150 ft-lb wrench at its 150 rating. It's a lug nut not a rod bolt. I don't know what the designed tolerances are that the OEM uses (do they figure out the optimum value and then pad it by 20%? 50%?) but whatever error my wrench has is likely well within that. If it was a critical level then most tire shops would have gone out of business eons ago.

But if you spy a wrench with a higher rating while out and about, and it's on sale... snag it. It'll likely be longer and easier to use to cinch up to the final value. Don't forget, you're not supposed to use 'em to loosen the lugs either, only for tightening.


2011 Toyota Camry, base, 2.5L/6MT, 205k, hers
2010 Toyota Tundra DC, 4.6L/6AT, 159k, ours
1999 Toyota Camry LE, 2.2L/4AT, 225k, his
Re: Torque wrench max question... [Re: supton] #5430486 05/16/20 08:34 AM
Joined: Dec 2015
Posts: 42
O
Oey12 Offline OP
OP Offline
O
Joined: Dec 2015
Posts: 42
Thanks! That’s what I was thinking... I guess I will just have to purchase a larger wrench. Yeah luckily I had a mechanic tell me that years ago...never loosen with a torque wrench.

Re: Torque wrench max question... [Re: Oey12] #5430505 05/16/20 08:51 AM
Joined: Apr 2020
Posts: 428
ABN_CBT_ENGR Offline
Offline
Joined: Apr 2020
Posts: 428
Originally Posted by Oey12
I have a CDI torque wrench that is capable max of a 100ft pounds. Recently I purchased a Toyota Tundra that requires 97ft pounds for the lug nut torque. Should I upgrade to a larger capacity wrench or is my current one sufficient? .


That depends on the answer to this question- do you have a TW with a break away or a beam?

If you have a beam- throw it away, if not ( and its within specs) it will be good through all ranges of torque. ( they are tested and certified through all ranges)

They tell you not to max it because people often have the tendency to want to use them as a pull handle and stress them and that will throw it out real quick.

Most of those time honored tales are about the beam wrench with the pointer- they are all but worthless in terms of accuracy- we don't even accept them for calibration and certification because even if they work, they don't at all ranges for very long.

Re: Torque wrench max question... [Re: Oey12] #5430520 05/16/20 09:04 AM
Joined: Nov 2006
Posts: 23,438
T
Trav Offline
Offline
T
Joined: Nov 2006
Posts: 23,438
20% of the lower range only, max is okay. A spit beam is ideal for this sort of work and there is no need to set it back to zero after use, you can use this type to loosen then also if you want, its not an issue.
Some manufacturers like Stahlwille and Norbar on some models bake the 20% into the cake so it can be used full scale. This is a good one for what you want to do with it.

https://www.amazon.com/Precision-Instruments-PREC3FR250F-Silver-Torque/dp/B002XMSFIM


ASE L1, Master. Deutsch Meisterbrief.
Re: Torque wrench max question... [Re: Oey12] #5430528 05/16/20 09:16 AM
Joined: Dec 2015
Posts: 42
O
Oey12 Offline OP
OP Offline
O
Joined: Dec 2015
Posts: 42

Re: Torque wrench max question... [Re: Oey12] #5430529 05/16/20 09:16 AM
Joined: Jun 2003
Posts: 20,856
C
Chris142 Online Content
Online Content
C
Joined: Jun 2003
Posts: 20,856
It may be a couple pounds off @ that end. But a lugnut wont matter if its 97,100 or 94 ft lbs.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: Torque wrench max question... [Re: Oey12] #5430534 05/16/20 09:26 AM
Joined: Dec 2018
Posts: 1,064
F
Farnsworth Offline
Offline
F
Joined: Dec 2018
Posts: 1,064
If there was a calibration certificate with it, use that to get closer to an actual 100. No need to buy a bigger one, it's likely no more than 3-4 off.

Re: Torque wrench max question... [Re: Oey12] #5430554 05/16/20 09:55 AM
Joined: Jan 2010
Posts: 3,890
J
JeffKeryk Offline
Offline
J
Joined: Jan 2010
Posts: 3,890
He who dies with the most tools wins.
Get another torque wrench.


2018 Tesla Model 3, Medium Range Battery
2018 Lexus RX450h
2013 Lexus GS350 F Sport
2006 Acura TSX
2001 Tundra Access Cab, 1998 Accord LX, 1968 Corvette L36 Roadster, 1965 Olds 4-4-2
Re: Torque wrench max question... [Re: Oey12] #5430611 05/16/20 11:19 AM
Joined: Jan 2009
Posts: 7,949
gathermewool Offline
Offline
Joined: Jan 2009
Posts: 7,949
The proper range for a torque wrench is 20-90%

Source: MIL-STD-1312-31

//

In your case, I would NOT buy a new torque wrench. As has been posted, being off by a little won't matter much for something like lug nuts. Just make sure to pay attention to the torque, so you don't go over by a lot. You might want to test it by using the crowbar supplied with your vehicle and then using the torque wrench. It should immediately click OR not need much additional rotation to click.

I used a bad torque wrench at the end of its range once and it never clicked. I ended up pushing the threads and had to replace the fastener/nut.


14 Forester XT Touring FA20DIT (Cobb Stage 1)
Castrol Magnatec 5W-30 D1G2 + FU filter (2nd OFI) (77,760mi, 3/7/20)
15 Legacy Premium FB25
Magnatec 0W-20 D1G2+ FU filter (2nd OFI) (54,621mi, 3/4/20)
Re: Torque wrench max question... [Re: Oey12] #5430628 05/16/20 11:43 AM
Joined: Oct 2005
Posts: 5,547
D
DuckRyder Offline
Offline
D
Joined: Oct 2005
Posts: 5,547
Both of my CDI came with a calibration certificate it will tell you how far off it is at 100. It is in the slot with the lenders manual.

Agree though that for a lug nut it isn’t that critical.


Robert
  • 2019 Volkswagen Jetta R-Line
  • 1972 F100 Ranger XLT (445FE/C6/9” 3.50 Truetrac)
  • 2002 Ford Ranger XLT 4D Supercab 3.0L
Re: Torque wrench max question... [Re: Oey12] #5430696 05/16/20 01:24 PM
Joined: Jun 2012
Posts: 799
R
redbone3 Offline
Offline
R
Joined: Jun 2012
Posts: 799
Originally Posted by Oey12
I have a CDI torque wrench that is capable max of a 100ft pounds. Recently I purchased a Toyota Tundra that requires 97ft pounds for the lug nut torque. Should I upgrade to a larger capacity wrench or is my current one sufficient? The only reason I am asking is because I read somewhere years ago that when you get to the max torque specs it’s not as accurate... And I cringe at the idea of the dealership or mechanic using a impact gun to tighten. My step dad lost a tire on a suburban doing 70 one time...no thank you.


Torque wrenches (click type) are rated for accuracy (3% or 4% of setting) from 20% of range to 100% of range. So, a 100 ft/lb wrench is perfectly fine for a 97 ft/lb lug.


2014 Passat Wolfsburg, 1995 Miata.
Re: Torque wrench max question... [Re: redbone3] #5430703 05/16/20 01:40 PM
Joined: Jan 2006
Posts: 2,997
S
SubLGT Offline
Offline
S
Joined: Jan 2006
Posts: 2,997
Originally Posted by redbone3
...Torque wrenches (click type) are rated for accuracy (3% or 4% of setting) from 20% of range to 100% of range. So, a 100 ft/lb wrench is perfectly fine for a 97 ft/lb lug.


I agree 100%.

My lightly used 45 year old 100 ft-lb Snapon click-type torque wrench was recently calibrated and adjusted (for the 1st time ), and is within 2% at its max of 100 ft-lb. Before adjustment and replacement of some parts, it was 8% high at 100 ft-lb.

But calibration companies advise that a wrench that is frequently used at the max value will require more frequent calibration.

Re: Torque wrench max question... [Re: Oey12] #5430752 05/16/20 03:14 PM
Joined: Jun 2003
Posts: 181
S
samven Offline
Offline
S
Joined: Jun 2003
Posts: 181
I got one of those HF 1/2" drive wrenches on sale just for doing things like this. I got tired of accidentally stepping on or dropping my good wrench when I was wrestling tires or having to lay it down in the grass when I was working on the trailer. They are cheap on sale and I check it against my calibrated wrench every once in a while and its always close enough +- 5%.

Re: Torque wrench max question... [Re: Oey12] #5430813 05/16/20 05:09 PM
Joined: Nov 2006
Posts: 23,438
T
Trav Offline
Offline
T
Joined: Nov 2006
Posts: 23,438


Quote
CDI 1002MFRMH Torque Wrench Features:
Accuracy: ± 3% clockwise ± 4% CCW of indicated value, CW, from 20% to 100% of full scale


ASE L1, Master. Deutsch Meisterbrief.
Page 1 of 2 1 2
Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™