Manifold bolt torque


Information and questions on GL1000 Goldwings (1975-1979)
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pshaginaw
Posts: 33
Joined: Mon Jul 20, 2009 3:53 pm
Location: Waynesville, NC
Motorcycle: 1978 Honda GL1000
1987 Yamaha Virago XV535T
1975 Honda CB360T
1999 Honda Valkryrie
2005 Suzuki Boulevard S40

Manifold bolt torque

Postby pshaginaw » Thu May 09, 2013 4:07 pm



Try as I might, I have not found a reference for the correct torquing of the manifold -to-cylinder head bolts.
The shop manual references removal of the acorn nuts holding the manifolds,but just states reverse the steps on re-assembly. No torque value given. Same with the Clymer manual. Same with the Honda Do-it-yourself maintenance download. Lots of cautions about stripping bolts in an aluminum head, but no rerference to correct torquing.I am not using the stock bolts with the acorn head, but have used a Tek-Bolt M6-32 flange bolt replacement.
Shop manuals for other Honda models recommend 10ft-lbs torque for a M6-32 bolt into an aluminum block. Does this value seem safe to use for the GL1000?



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virgilmobile
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Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Manifold bolt torque

Postby virgilmobile » Fri May 10, 2013 7:43 am

The info you have sounds fine...Generally,there is a generic recomended torque for a given size bolt/nut in every service manual.
It's not uncommom to omit this info for the reassembly unless it's a critical point of interest...like the heads or axle bolts...

The info you got is more accurate than the German torque guide..."goudentight" :D

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Fred Camper
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Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: Manifold bolt torque

Postby Fred Camper » Sat May 11, 2013 3:29 pm

There are rubber seals under the bolt heads and you do not want to over compress them. Best check them hot.


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