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Engine to frame torque

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Simmoto View Drop Down
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    Posted: 07 Mar 2018 at 12:47
I'm getting a bit nervous torquing the engine to frame nuts to the 78 Nm (58 ft/lbs) value I took from Gregory Bender's site. Are the spacers just pushing against the alloy casting at the front of the engine? What torque have you used on your Loop?
Thanks


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Dave P. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 07 Mar 2018 at 13:30
Originally posted by Simmoto Simmoto wrote:

I'm getting a bit nervous torquing the engine to frame nuts to the 78 Nm (58 ft/lbs) value I took from Gregory Bender's site. Are the spacers just pushing against the alloy casting at the front of the engine? What torque have you used on your Loop?
Thanks




I just do them up tight with a socket and a 12" ratchet spanner.A combination spanner secures the other end.That's how technical I get.They've never come loose.
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

1971 V7 Special. 1972 850GT.
1970 T120 Bonnie. 2009 500 Bullet.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 07 Mar 2018 at 13:53
Out of interest I've just been and checked.The 750 was at around 45 ft/lbs.Now 50 ft/lbs.The 850 clicked the torque wrench without the nut moving at 58 ft/lbs.So maybe it's even tighter.I've never disturbed the fixings on the 850.
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

1971 V7 Special. 1972 850GT.
1970 T120 Bonnie. 2009 500 Bullet.
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Simmoto View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Simmoto Quote  Post ReplyReply Direct Link To This Post Posted: 07 Mar 2018 at 14:34
Thanks Dave! Bolstered by your experience I had the confidence to give them a good nip somewhere close to 78Nm.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Simmoto Quote  Post ReplyReply Direct Link To This Post Posted: 31 Mar 2018 at 16:07

Hmmm. well this one was maybe too tight!


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Jerry atric View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jerry atric Quote  Post ReplyReply Direct Link To This Post Posted: 01 Apr 2018 at 19:21
Blimey!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpc Quote  Post ReplyReply Direct Link To This Post Posted: 01 Apr 2018 at 20:33
The thread looks so ugly, might be a good thing it broke  Thumbs Up
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 01 Apr 2018 at 22:26
That nut may have been over tightened in the past, but I would have expected it to strip rather than split.Also, do we know if it is an original quality nut? What are the threads like on the bolt?
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

1971 V7 Special. 1972 850GT.
1970 T120 Bonnie. 2009 500 Bullet.
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iansoady View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 02 Apr 2018 at 10:09
In my experience it's usually the male thread that strips rather than the female (assuming similar materials) as there's more metal in the female.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 02 Apr 2018 at 14:31
True...that's why I wondered about the quality of the nut.
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

1971 V7 Special. 1972 850GT.
1970 T120 Bonnie. 2009 500 Bullet.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 02 Apr 2018 at 16:40
Yes, I don't think I've ever had one split like that (unless using a nut splitter.....)
Ian
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Simmoto View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Simmoto Quote  Post ReplyReply Direct Link To This Post Posted: 02 Apr 2018 at 17:03
First time I've seen it but interestingly someone on the Guzzi forum did the same thing on the same day (don't know what bike). It looks like an original nut to me but can't be sure. Stuck one on from my Bimmer for the moment and have ordered new. I guess after 45 years anything can happen...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jerry atric Quote  Post ReplyReply Direct Link To This Post Posted: 02 Apr 2018 at 17:45
Could it be that a PO had indeed used a splitter on it and then cheekily put it back on and you didn't spot it when dismantling. The clue would be, was it very tight when you undid it? As we all know, these can be notorious for corrosion and not undoing. Just a thought
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Simmoto Quote  Post ReplyReply Direct Link To This Post Posted: 02 Apr 2018 at 19:25
I guess that's possible, if I could find it I could take a look at the nut but fear its deep in the recycling bin...
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