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Old 11-23-2011, 03:44 PM   #1
oldroadie OP
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/5 airhead torque value

Okay, it's fall/winter project bike time and I'm already battling Clymer who seem to have hidden the torque value quite cleverly. I know the 1972 R75/5 had issues with folks over tightening these bolts, I've got my inch pounds wrench at the ready...who knows the number and will you post it, please?

edit: forgot to specify - Torque value for the oil pan bolts, please.


oldroadie screwed with this post 11-23-2011 at 03:56 PM
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Old 11-23-2011, 03:47 PM   #2
pommie john
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We need to know which bolts you're talking about.
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Old 11-23-2011, 03:55 PM   #3
oldroadie OP
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Quote:
Originally Posted by pommie john View Post
We need to know which bolts you're talking about.
Yes, I suppose that would help. Torque value for the oil pan bolts, please.
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Old 11-23-2011, 04:17 PM   #4
Houseoffubar
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Old 11-23-2011, 04:36 PM   #5
Horsehockey
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For the oil pan bolts, it's something like 6 or 7 foot pounds. In other words, just snug. A dry oil pan is a function of how clean you prepare the metal surfaces (use acetone to get it all....no residual anything), and tighten the 14 bolts in a crosswise star pattern beginning in the middle of the two long sides. Tighten sequentially, not all at once on a single bolt.

For torque specs:

http://bmwmotorcycletech.info/torquevalues.htm

Horsehockey screwed with this post 11-23-2011 at 04:44 PM Reason: correct the inch pound/foot pound reference
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Old 11-23-2011, 04:37 PM   #6
pommie john
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This seems to say 6lb ft (72 inch pounds)
That sounds about right to me.

http://www.bmwscotter.org/tools/torq...rque-specs.pdf
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Old 11-23-2011, 04:42 PM   #7
Horsehockey
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Quote:
Originally Posted by pommie john View Post
This seems to say 6lb ft (72 inch pounds)
That sounds about right to me.

http://www.bmwscotter.org/tools/torq...rque-specs.pdf

Right you are Pommie. Here's Snowbum's work on the subject:

Oil pan mounting bolts: book values 6.5-8 (some books show to 8.5)foot-pounds.......I suggest less, perhaps 5.5-6, carefully tighten in a staggered
cross-pattern, starting at the center ones, and do it very evenly. NO GOO! Put the lettered side UP. There is a heat-activated glue on these.
The old cork gaskets are NLA. I do these bolts BY HAND, not torque wrench. YOU may want a torque wrench MOST torque wrenches
of the type that have a range of maybe 5 to 75 foot-pounds, can NOT be used for this, as their accuracy is NOT good, nor is the FEEL for the click.
If you plan to use a torque wrench, use an INCH-pound wrench. Multiplying my 5.5-6 foot-pounds by 12, you can see that I would be
recommending 66 to 72 INCH-pounds.
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Old 11-23-2011, 05:04 PM   #8
Bill Harris
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Snug but not too snug. Get a 0-200 inch-lb torque wrench and use 70-75 inch-lbs. On aluminum, your best friend is a 3" palm ratchet, 3/8 drive.

Pan bolts, run through the pattern, snug them and run it for a week and re-snug. The gasket tends to "settle".
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Old 11-23-2011, 10:30 PM   #9
wmax351
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I did them via a screwdriver type socket to hand tight, then snugged them with my hand around the middle of a 3 inch flex ratchet. Less is better. A couple stripped out anyhow (when they are ready to go, they go with the slightest torque). Loosen, then retighten as you are taking the pan off: that way you strip the threads which are shot before you put the pan back on. Helicoil is your friend.
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Old 11-24-2011, 06:06 AM   #10
oldroadie OP
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thank you

Thanks everybody. I knew I had read that number somewhere and when I didn't find it in the Clymer I just stopped working and walked away; too many months of prep reading and I hadn't bookmarked the proper spot. It seems that I read and absorbed Snowbum's procedure and my tiny brain just didn't remember...
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Old 11-25-2011, 12:51 PM   #11
lkchris
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Good place to use Loctite
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Old 11-25-2011, 02:29 PM   #12
disston
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Quote:
Originally Posted by lkchris View Post
Good place to use Loctite
I don't use a torque wrench on these and I also use Locktight, Blue, most times. However on occasion when I could not find the tube of Locktight it worked fine, they held, dry. Still did not use a torque wrench.
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