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850 COMMANDO -- STAINLESS STEEL HEAD BOLTS

Discussion in 'Norton Commando Motorcycles (Classic)' started by Jason Curtiss, Aug 19, 2003.

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  1. Jason Curtiss

    Jason Curtiss

    Joined:
    Jun 14, 2003
    Does anyone have any experience using stainless steel head bolts on a 850 Commando?

    Stainless steel generally has a lower minimum yield strength as compared to, say, the more common SAE Grade 5 bolt steel. Because of its lower yield strength, the stainless will stretch more than Grade 5 material, given the same make-up torque.

    I purchased some stainless head bolts from Raber's Parts Mart and they appear to be of high quality but it's difficult to tell what the yield strength is. So, I am concerned about the bolts stretching, resulting in a leaky head gasket.

    Any thoughts will be appreciated.

    Jason
     
  2. Mark Hine

    Mark Hine

    Joined:
    May 21, 2003
    I have had stainless head bolts on my 71 750 for 2 Years with no problems. I used the factory torque setting and retorqued a couple of times over the first 1000 miles. No sign of any gasket leakage.
     
  3. Anonymous

    Anonymous Guest

    Thank you for the feedback Mark; anyone else with similar experience?
     
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