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dwill49965 Samba Member
Joined: August 08, 2005 Posts: 1396 Location: Dartmouth, Nova Scotia
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Posted: Sat Apr 01, 2006 7:53 am Post subject: Rocker shaft assembly torque value - discrepancy |
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78 Westy, 2L FI. I have just re-sealed all of the push rod tubes (first time) and am re-assembling the rocker shaft assembly. What is the value for torquing the nuts down on the rocker shaft assembly?
There is a discrepancy between Tom Wilson's number in the "Rebuild ..." book - he says 18 ft-lbs (page 136). The yellow Type 2 Repair Manual (2nd ed) indicates 10 ft-lbs (diagram on page 15.2).
My gut feeling is to go with the Type 2 Repair manual, but thought I'd ask. This is quite a discrepancy in values, and I don't think splitting the difference would be wise (although tempting).
Any thoughts? _________________ Darryl
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'78 Westy, Boston Bob built 2.0 L, FI, MSD 6A
Meyer wrote: |
Lastly, you just referred to US citizens as 'Americans'. Exactly what kind of Canadian are you? From what continent? |
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Fusion Samba Member
Joined: February 27, 2006 Posts: 37 Location: One step away...
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Posted: Sat Apr 01, 2006 7:56 am Post subject: |
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You may get a lot of differing opinions on that question! I just did this and went with Wilson's torque value. The book seems to be highly recommended so figured I could trust it! _________________ 1977 Westy -- In process of resurrection |
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Randy in Maine Samba Member
Joined: August 03, 2003 Posts: 34890 Location: The Beach
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Posted: Sat Apr 01, 2006 8:15 am Post subject: |
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My Wilson book says to do 10 foot pounds (page 154) on those 7mm "rocker shaft nut".
My Bentley (green cover) says to torque the nuts to 10 ft pounds on dual carb and FI engines and single carb engines to 18 foot pounds.
I would go with 10 myself. |
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dwill49965 Samba Member
Joined: August 08, 2005 Posts: 1396 Location: Dartmouth, Nova Scotia
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Posted: Sat Apr 01, 2006 9:43 am Post subject: |
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Thanks a lot for the replies, guys. Randy - I hadn't checked the green bently before, but you're right, 10 ft-lbs. At least it agrees with the yellow manual. Just for completeness, I just checked the Haynes manual - and it also says 10 ft-lbs. So - here's what I did - 12 ft-lbs (before coming back to check the posts here)!!
The conclusion, I have too many manuals. (Oops, didn't check the Muir book - but its upstairs in the bathroom, so maybe I'll do it later.)
Thanks. _________________ Darryl
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'78 Westy, Boston Bob built 2.0 L, FI, MSD 6A
Meyer wrote: |
Lastly, you just referred to US citizens as 'Americans'. Exactly what kind of Canadian are you? From what continent? |
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dwill49965 Samba Member
Joined: August 08, 2005 Posts: 1396 Location: Dartmouth, Nova Scotia
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Posted: Sat Apr 01, 2006 11:45 am Post subject: |
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Randy in Maine wrote: |
My Wilson book says to do 10 foot pounds (page 154) on those 7mm "rocker shaft nut".
I would go with 10 myself. |
On second reading of your post, I went and checked my Wilson book again, and the table says 10 ft-lbs, as you pointed out. So, the discrepancy is within the Wilson book (the text on page 136 and the table on p.154).
Guess I'll crawl back under there and torque them right. _________________ Darryl
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'78 Westy, Boston Bob built 2.0 L, FI, MSD 6A
Meyer wrote: |
Lastly, you just referred to US citizens as 'Americans'. Exactly what kind of Canadian are you? From what continent? |
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germansupplyscott Samba Member
Joined: May 22, 2004 Posts: 7093 Location: toronto
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Posted: Sat Apr 01, 2006 2:39 pm Post subject: |
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18 is for upright engines. 10 is for type 4 engines. they have different size rocker studs, so different torque values. _________________ SL |
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