Torque settings- initial and final?

[steadysteve]

Changed the oil and filter on my RT today- the Haynes manual gives two settings for the sump plug torque: Initial setting 23nM and the a final setting of 32nM.

No mention of leaving it for a length of time between tweaks or anything about degrees etc.

I aint going to lose sleep over it but just wondered if anybody knows why? Why not just do it to 32nM in the first place?. The sump washer is aluminium.
Thanks

 

[Smug]

If you feel the need to torque a sump drain plug then I would suggest that you get someone who knows better to work on your bike.

 

[Troppo]

 

[deangsadv]

If you feel the need to torque a sump drain plug then I would suggest that you get someone who knows better to work on your bike.

Having fixed many a stripped sump plug, ruined by people who think they know better, I would suggest the OP is by far the best person to work on his bike.

 

[steadysteve]

If you feel the need to torque a sump drain plug then I would suggest that you get someone who knows better to work on your bike.

I would imagine bmw, who probably do know better, supplied the info to Haynes.

Try reading the question again and if it's not too much trouble maybe offer an answer. As I said I'm not worried about it, just wondered why.

Since the last two 'professionals' who worked on my bike left copaslip on the seat and fasteners undone I think I would rather do some jobs myself and torque 'em up and know it's right.

thanks for your valuable input..

 

[Wrigsby1]

Trouble with guessing torque is that if you are knackered or nervous 30Nm may be 20 to you and on a good day 40-50... PS It also is worth paying attention to what the book says... The R1200 rear wheel/disc carrier replacement is probably down to the fact that the old torque for wheel bolt on to the more substantial 11/1150 output was 100Nm ish and the new one 60Nm... I've worked on my own bike for years and now own torque wrenches... If you do jobs like replace the clutch etc you will need one...

 

[Our Gee]

Mechanic friend of mine tells me more threads are stripped using Torque Wrenches than without. Don't ask where he got that from. It would be helpful if manuals also specified if threads are to torqued Dry, Lightly Lubed, Smothered with Copperslip etc, etc. It's a general rule that if a Torque value is specified for Dry threads then that should be reduced by about 25% if the treads are lubed.

 

[Smug]

Not many sump plugs get fitted with a dry thread.

 

[cookie]

torque figures are always dry unless otherwise stated.

i never use a torque wrench on sump plugs. not stripped one yet.

 

[Our Gee]

Not many sump plugs get fitted with a dry thread.

The clue is in the words "general rule" and whats more, "all" sump plugs are initially fitted dry during engine build. So if as Cookie says "all torque figures are dry unless otherwise stated" then subsequent fitting with oil wetted threads should "Generally" have the torque reduced by about 25%.