Author | Topic | |
James Ranaldi V4 Guru
United Kingdom 1475 Posts | Posted - 08 Jun 2020 : 09:55:33
| Good morning All,
Does anyone know the socket size for the Driveshaft castellated nut please.
Whilst the V4 site was down, I asked this question on the UKSaabs site and there has been some discussion. 1 5/16, 33mm or 3/4 Whitworth have been suggested but no absolute answer yet.
Thanks
1968 V4 96 ,LHD 1984 99 GL 1992 C900i Convertible 1993 C900 LPT Convertible 1987 C900 2 Door |
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elanwannabe Starting Member
USA 9 Posts | Posted - 08 Jun 2020 : 15:08:01
| James:
Check this out at www.saabnet.com>sonett bulletin board>Cv joint center nut size, Feb. 11, 2013:
nut is 1 5/16; front wheel hub torque: 130 ft-lbs. rear wheel hub torque: 65 ft-lbs.
Also, on page 020-14 of Sonett III service manual: torques above are verified, but manual does not list size of castle nut.
Hope this helps.
Stuart | |
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James Ranaldi V4 Guru
United Kingdom 1475 Posts | Posted - 08 Jun 2020 : 20:34:36
| Thanks for the information elanwannabe.
Fantastic site, unfortunately I cannot find an entry for Feb 11th 2013 on the Vintage Models Bulletin Board.
I'll go with 1 5/16
Thanks James
1968 V4 96 ,LHD 1984 99 GL 1992 C900i Convertible 1993 C900 LPT Convertible 1987 C900 2 Door | |
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deggsie V4 Fanatic
United Kingdom 431 Posts | Posted - 08 Jun 2020 : 20:47:38
| Jim The Bulletin Board is a bit tricky to navigate, but the post you're after is at https://www.saabnet.com/tsn/bb/sonett/index.html?bID=13155 (and subsequent posts in the same thread (it's just a statement of the nut size without quoting any official authority - but accords with earlier discussion)). Derek
___________________________ Saab - beyond the conventional ! | Edited by - deggsie on 08 Jun 2020 20:48:13 | |
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James Ranaldi V4 Guru
United Kingdom 1475 Posts | Posted - 09 Jun 2020 : 10:17:05
| Thanks for that Derek.
Looks like we are back to 1 5/16 which Andy Deans feels is too big !
Still waiting to see how he get's on with 33 mm.
Cheers James
1968 V4 96 ,LHD 1984 99 GL 1992 C900i Convertible 1993 C900 LPT Convertible 1987 C900 2 Door | |
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melle V4 Guru
United Kingdom 3830 Posts | Posted - 09 Jun 2020 : 11:27:58
| I can confirm that 1.5/16" AF is the correct size. There are no Whitworth fasteners on a V4, although I'm sure you can use a W or metric socket if you get stuck.
www.saabv4.com | |
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andydeans3 V4 Guru
United Kingdom 1994 Posts | Posted - 09 Jun 2020 : 20:00:17
| Stig
As I said across on UKSAABS, the 1 5/16" was a bit slack, (though it would have done the job, but the nut was VERY tight, and it broke the 1/2" to 3/4" drive adapter I was using. The socket is 1/2" drive, the breaker bar 3/4" drive) but I've just loosened mine with a 3/4" drive, 33 mm 6 point socket.
Needed the 3/4" drive, with a 1 metre breaker bar to free it. It's not been on that long, I fitted new discs and backplates around 2016, but boy it was tight. I thinks it's the tightest torque on the car at 130 lbf-ft.
Andy
1978 LHD SAAB 96 1978 MGB Roadster 2008 LHD "Classic" Renault Twingo 1991 Nissan Figaro | Edited by - andydeans3 on 09 Jun 2020 20:04:10 | |
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James Ranaldi V4 Guru
United Kingdom 1475 Posts | Posted - 10 Jun 2020 : 09:36:50
| Thanks Melle.
Good result Andy,
Another question :-
As the nut only lines up with the split pin at any one of six discreet positions, it is unlikely that the required torque figure will be obtained exactly at one of these positions.
Thoughts on whether the nut should be backed off slightly or tightened up to the next available position to line up the split pin ?
Cheers
1968 V4 96 ,LHD 1984 99 GL 1992 C900i Convertible 1993 C900 LPT Convertible 1987 C900 2 Door | |
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andydeans3 V4 Guru
United Kingdom 1994 Posts | Posted - 10 Jun 2020 : 20:20:14
| Stig. I'd back off slightly, you don't want to tighten it more, considering that the torque is a very high 130 lbf-ft.
Andy
1978 LHD SAAB 96 1978 MGB Roadster 2008 LHD "Classic" Renault Twingo 1991 Nissan Figaro | Edited by - andydeans3 on 10 Jun 2020 20:20:39 | |
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James Ranaldi V4 Guru
United Kingdom 1475 Posts | Posted - 10 Jun 2020 : 20:24:46
| Agreed Andy.
Cheers
1968 V4 96 ,LHD 1984 99 GL 1992 C900i Convertible 1993 C900 LPT Convertible 1987 C900 2 Door | |
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andydeans3 V4 Guru
United Kingdom 1994 Posts | Posted - 11 Jun 2020 : 20:18:18
| Well, I decided to check my back brakes on the same side, since I'm in "brakes" mode. Castle nut is 1 1/8". All's well there, but when I torqued up to 65 lbf-ft, the hole was right behind the castle. On the front there are 2 holes, 90 degrees apart, but on the back there's only one hole....
By the time I backed off enough, there was very little torque left. Even going up to 70 - 75, still no dice. So, out came the wee Dremel, with a mini cutting disc, a little modification tho the appropriate castle sections, job done. Great tool the Dremel!!!
Andy
1978 LHD SAAB 96 1978 MGB Roadster 2008 LHD "Classic" Renault Twingo 1991 Nissan Figaro | Edited by - andydeans3 on 12 Jun 2020 00:44:00 | |
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n/a deleted
4 Posts | Posted - 12 Jun 2020 : 11:29:12
| Better to face off the nut a bit or where possible the big washer under it. A quick rub down on some 240 grit could be enough. Because of the way the thread gets cut, a different nut will change the final position. Just swapping the nuts side to side might also work.
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James Ranaldi V4 Guru
United Kingdom 1475 Posts | Posted - 29 Jun 2020 : 12:26:38
| I have just received a new 3/4 Whitworth socket via 'tinternet.
I can now confirm that it is almost perfect and definitely a tighter fit than the 1 5/16 " socket previously mentioned. 7/8 " BSF also fits ( from Car 55).
Sorted !
Thanks all.
1968 V4 96 ,LHD 1984 99 GL 1992 C900i Convertible 1993 C900 LPT Convertible 1987 C900 2 Door | |
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deggsie V4 Fanatic
United Kingdom 431 Posts | Posted - 29 Jun 2020 : 15:37:32
| Well it's certainly good to hear that you've got your nuts sorted !!
___________________________ Saab - beyond the conventional ! | |
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