R65 rocker cover nuts

[its_only_me]

I have bought some new stainless centre nuts for the rocker covers, but before I fit them I was wondering if anyone could tell me the torque setting?

[nhmaf]

"Not very much" - if you over-torque them you may end up with a pulled or snapped stud, which is repairable but a royal pain.
Haynes manual shows from 22 to 26Nm, or 16 to 18 lb-feet.   I certainly wouldn't go over this amount, and possibly a bit less.  you just don't want it to fall off or vibrate loose or for the gasket to leak oil.  If you find yourself cranking down on it
to try to stop an oil drip from the rocker covers, it is time to get a new gasket for the rocker cover.   Basically I treat these
sort of like sparkplugs - you want them snug, but not very tight.

 

[nhmaf]

You do have flat washers to go with those "acorn" nuts, too, I presume !

People often lose the flatwashers, and then forget that there is indeed supposed
to be one under the nut in the centre of the valve rocker cover.

[Rob Valdez 79 R65]

Actually they are "wave" washers (a sort of lock washer).

Not very tight is the key, but they will fall out on you.  I know.

I have been riding my bike without either one for a year now.  I am thinking about just gluing mine in place so people will quit bugging me about it.

You don't need them.  The two on the outside should do the job.

[thrang]

I managed to pull the rhs stud on the bimbo not long after I got her torquing it to 18lb-ft, and although repairing the stud was easy enough (with a helicoil) it was a pain in the arse having to remove the head (seized exhaust nut).

[Justin B.]

Hmmm, I must be doing this incorrectly as I have never removed the head to HeliCoil this hole!

[MrRiden]

Um, I figure the torque figure is here somewhere. Hows your German?
http://www.redeker.net/r45/anziehdrehmoment.pdf
Rich

[Semper Gumby]

I use 20 n-m (with a washer) but only because I had one pull out the stud at 24n-m  (now heili coiled - Thank you Nathan Boxerworks)  Dawgone thing fell out on the ground they DAY BEFORE i left on my IBA 50 CC. (and I didn't use any bad words).  

[thrang]

I guess I was a bit a ham fisted, and I think the previous owner of the Bimbo may have over torqued the center bolt as I didn't have it happen again... Although I have been a little less forceful with them since

[trolle]

For the last three years people on this forum have been refering to "helicoil" - what is that, and how does it look? Pictures please, Rob, you who have pics of nearly anything related to our beloved bikes.

greetings from a grey and cold north

trolle

[donbmw]

A heicoil is a thread insert, that is the inside is the same size as the bolts or screw thread is but the outside is larger. It looks like a coil, you drill the hole out to a larger size that it is normaly then a thread tap is turned in the hole to make the threads for the heicoil to be turned into. After it is in place the orignial srcew or bolt can be used.

Don

[trolle]

Thanks

greetings from a rainy north

trolle

[kikoth]

Hi everybody,

For Trolle :  ( and everybody else interested ! )

for more détails on helicoils :

http://www.emhart.com/products/helicoil.asp

pictures an explanations...

that's the least i could do  for you , Trolle, after the wonderful link for part lists
you gave us...  

have a nice day,
chris

[trolle]

I am overwhelmed  [smiley=beerchug.gif] Now I only have to find a Danish supplier to provide me with helicoils for all the plugs I have overstressed during the last three years - one per year  [smiley=dankk2.gif]

greetings from a grey and cold north

trolle

[Rob Valdez 79 R65]

I am overwhelmed  [smiley=beerchug.gif] Now I only have to find a Danish supplier to provide me with helicoils

inquire on kleinboxer.de