tightening torques
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Autor Thema: tightening torques  (Gelesen 817 mal)

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Anto

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tightening torques
« am: 06 Januar 2019, 11:42:51 »

Goodmorning everyone. I have some questions to ask.

1) In the German language manual of the R25 / 2 I found the tightening torque of the head screws which is 41 Nm; Is this correct?
2) Can someone tell me the steps of the kilometers of intervention to tighten the head?
3) I need to know how many Nm tighten the screws of the cylinder base.
4) Is there a workshop manual in English?

Thank you for your kind answers and a happy new year to everyone from Anto
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tightening torques
« am: 06 Januar 2019, 11:42:51 »

CowBoy

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Re: tightening torques
« Antwort #1 am: 06 Januar 2019, 13:09:44 »

Buongiorno Anto,

the tightening torque in the Manual was 4,2 mkg equal 41 Nm.
Later on the torque was reduced to 35 mkg.

Using the Standard sealings I tight the bolts in 3 steps 15, 25, 35, with the Uli Seiwert
special sealig - best experiences - 20, 30, 50 Nm.

After roughly 100 km I check the torque again and the valves as well. Again after 500 km and then
all 3.000 km

Cylinder base nuts don't have a tightening torque in the Manuals - tight them tight, but not too tight.
A skillful mechanic knows by experience how to fix...

Due to the fact that BMW started exportation of Motorcycles in the early fifties, I suppose that there
must be an englisch Version too - I havent seen one yet.
Saluti, Ulli
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R67treiber

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Re: tightening torques
« Antwort #2 am: 06 Januar 2019, 13:33:30 »

Ciao Anto,

check out Barringtonmotorworks.com. Chris wrote a couple of really good manuals ... not cheap, but very good. Not sure about the R25/2, though.

salve
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strichzwojan

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Re: tightening torques
« Antwort #3 am: 06 Januar 2019, 14:18:55 »

Hi Antonio,

35 Nm ist correct. tightening crosswise in three steps as recommended above. After the re-tightening 500 km after assembling I do not touch it anymore. The combination of bolts (steel) and cylinder (steel) seems reliable to me.

Jan
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Re: tightening torques
« Antwort #4 am: 06 Januar 2019, 16:03:17 »

Thank you all for the quick and complete answers. I would say in pure German style. Thanks again from Anto.
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