 | Home > Maintenance & Modifications > Torquing with a ring spanner |
 
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| ZeDefender Member Since: 15 Sep 2011 Location: Munich Posts: 4731   
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Please does anyone have any tips or tricks on how to correctly torque M8 bolts with a ring spanner? I need to "permanently" bolt on my turbo and 2 of the 3 bolt heads aren't accessible even with a small torque wrench. I'm going to be using Nord Lock washers, so I don't want to cock it up
Cheers Matt Last edited by ZeDefender on 19th Mar 2013 6:32pm. Edited 1 time in total |
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19th Mar 2013 5:16pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17337  
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Usually done with something like this, or better still the full ring version (of which I cannot immediately find a photo).
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19th Mar 2013 5:40pm |
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| ZeDefender Member Since: 15 Sep 2011 Location: Munich Posts: 4731
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Thanks guys.
Laurie - that's very clever...now I need a compact spring balance  Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing... |
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19th Mar 2013 6:35pm |
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| v8steve Member Since: 18 Apr 2011 Location: dumfries scotland Posts: 195 
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crow foot spanners are a good idea. should be able to buy a 13mm it's self to fit your m8 bolts if access allows.
nord-locks on the way, posted today  110 xs s/wagon
s3 swb soft top |
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19th Mar 2013 7:19pm |
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| ZeDefender Member Since: 15 Sep 2011 Location: Munich Posts: 4731
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Brilliant Steve - many thanks.
Pardon my ignorance Messrs Blackwolf and Steve but could you use a crow foot with a torque wrench? Wouldn't it move/mess up the pivotal force? In any event, I fear I can't squeeze anything in there apart from a ring. It's probably why LR failed 3 times to stop the studs falling out (that and the fact they really need re-tightening after a few heating/cooling cycles). Cheers Matt Tell someone you love them today because life is short. But shout it at them in German because life is also terrifying and confusing... |
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19th Mar 2013 7:32pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17337
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If you attach the crowfoot so that its axis is perpendicular to that of the torque wrench any inaccuracy will be negligible.
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19th Mar 2013 11:58pm |
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| ZeDefender Member Since: 15 Sep 2011 Location: Munich Posts: 4731
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Doh!
I'll look today to see if I can get one in there... Tell someone you love them today because life is short. But shout it at them in German because life is also terrifying and confusing... |
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20th Mar 2013 6:51am |
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| Diablo Member Since: 26 Oct 2011 Location: Basingstoke Posts: 335 
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Crowsfeet are pretty good, but one way is to torque a nut up to the required torque, then put your ring spanner on it and see how tight it is. Then do the turbo one up to the same
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20th Mar 2013 1:18pm |
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| ZeDefender Member Since: 15 Sep 2011 Location: Munich Posts: 4731
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That was my original thought but each of the three bolts require my hands, body and legs etc. to be in completely different positions (under, over, behind, in front)
I've probably got a few days until the washers arrive, so perhaps I can try a few suggestions out Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing... |
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20th Mar 2013 2:11pm |
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| kmac Member Since: 07 Oct 2009 Location: Middlesex Posts: 1308 
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How about this...
http://www.ebay.co.uk/itm/Sturtevant-Ratch...7675.l2557 |
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20th Mar 2013 11:10pm |
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| ZeDefender Member Since: 15 Sep 2011 Location: Munich Posts: 4731
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Yesssssssss!!!!!
Now to find one... Many thanks Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing... |
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20th Mar 2013 11:53pm |
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| smb Member Since: 15 Jan 2013 Location: Cheshire Posts: 1232 
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Hi All,
The method mentioned is the most common for hard to get to nuts/bolts. You do have to be careful when using an adapter like a Crowsfoot or a closed end spanner as you need to take into account the length from the centre of the nut/bolt to the centre of the Torque coupler(doesn't matter what size as it is to the centre. To help give you as close an accurate Torque setting you use a formula as follows: Y=((TxL)/(L+E)) where Y will be the new reading on the Torque Wrench, T is the required Torque on the bolt/nut, L is the length from centre of connector in Torque Wrench to centre of Handle Grip and E is the extension distance(centre of bolt head to centre of connector. i.e.. If the bolt has to be torqued to 40lb/in, the length of the Torque Wrench is 300mm and the length of the adapter is 50mm then you will need to apply a force on the handle of 34lb/in. As you can see it is a big difference. This can only work when the centre of the bolt is in line with the centre of the adapter and the centre of the torque wrench or if the wrench is at 90deg to the adapter. If the Wrench is at any other angle to the Adapter then you have to adopt a different formula where the angle value has to be included. Hope this helps. Steve Last edited by smb on 21st Mar 2013 2:42pm. Edited 1 time in total |
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21st Mar 2013 2:33pm |
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| WelshGas Member Since: 01 Oct 2010 Location: Vale of Glamorgan Posts: 935  
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For ZeDefender- new here http://www.srtorque.com/Products/SystemsandTools/STindex.html
LANDYWATCH
Neighbourhood Watch for Land Rover Owners http://www.landywatch.co.uk/smf2/index.php |
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21st Mar 2013 2:54pm |
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| smb Member Since: 15 Jan 2013 Location: Cheshire Posts: 1232
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Just been talking to one of my Design Engineers who up until this point I thought was very clever!!!!!
It turns out he takes the easy route and goes on the following link: http://www.cncexpo.com/TorqueAdapter.aspx A lot easier |
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21st Mar 2013 2:58pm |
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