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Ian
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Joined: August 28, 2002
Posts: 4932
Location: 713
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 Posted: Sun Jul 27, 2008 8:46 pm Post subject: Transmission Horn Bolt Torque |
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What is the torque spec for the large 27mm transmission horn bolts? I couldn't find it in the Bentley anywhere near the RGB pattern?? Thanks!
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All your Buses are belong to us.
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IN LOVING MEMORY OF ROB CRESS 1968-2012
**ACHTUNG DO NOT USE AA BRAND PRODUCTS OR BUY ANYTHING FROM PACIFIC PARTS INTERNATIONAL IN CALIFORNIA** |
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campingbox 
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Joined: November 14, 2000
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Location: Petaluma, CA
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| Posted: Sun Jul 27, 2008 8:48 pm Post subject: |
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| Tight. No need for a cheater pipe though. |
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Ian
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| Posted: Sun Jul 27, 2008 8:52 pm Post subject: |
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| campingbox wrote: |
| Tight. No need for a cheater pipe though. |
I got them torqued to 100ft/lbs??
_________________
All your Buses are belong to us.
Love and good roads!
IN LOVING MEMORY OF ROB CRESS 1968-2012
**ACHTUNG DO NOT USE AA BRAND PRODUCTS OR BUY ANYTHING FROM PACIFIC PARTS INTERNATIONAL IN CALIFORNIA** |
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campingbox
Samba Member
Joined: November 14, 2000
Posts: 10196
Location: Petaluma, CA
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| Posted: Sun Jul 27, 2008 9:45 pm Post subject: |
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| Ian wrote: |
| campingbox wrote: |
| Tight. No need for a cheater pipe though. |
I got them torqued to 100ft/lbs?? |
That should be fine. |
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chrisflstf
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Joined: February 10, 2004
Posts: 3446
Location: San Diego
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| Posted: Sun Jul 27, 2008 10:33 pm Post subject: |
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| 167 ft lb |
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easy e
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Joined: May 28, 2008
Posts: 3931
Location: 1 hr north of Santa Barbara
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| Posted: Sun Sep 21, 2014 12:04 pm Post subject: |
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In general, should used bolts be torqued more or less than spec?
Years ago, I recall a seasoned professional mechanic explaining it should go one way or the other... but don't recall the details. Something about the yield ... and how a used bolt has already given up some of it oomph. I'm thinking it should be less by 5-10%?... than if all male/female threads are virgin.
e
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chrisflstf
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| Posted: Sun Sep 21, 2014 12:20 pm Post subject: |
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| Bolts get torqued to specs, not by age. |
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easy e
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| Posted: Sun Sep 21, 2014 1:21 pm Post subject: |
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Age has little to do with it. One could expect a 50 year old NOS bolt is 99.9% as good as a freshly made bolt. Maybe better.
What I'm inquiring about is how to accommodate for the effects of stretch, yield & cyclic fatigue.
Simply, threads aren't 'per spec' forever... nor are the steel properties right under the head.
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chrisflstf
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Location: San Diego
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| Posted: Sun Sep 21, 2014 1:30 pm Post subject: |
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Even if that is true, you have no way of knowing the history of the bolts in question, so you will never have a real answer. Just tighen them to spec and find something else to stress about
If that doesnt help, go buy some new ones, if you can find them. If you need extra insurance, use loctite |
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easy e
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