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Torquing up the head (V8)

Discussion in 'The Hokey Ass Message Board' started by dudford, Dec 2, 2012.

  1. I've had a preliminary search for this but struggled to find what I wanted, apologies if already covered...

    My Dad is working on his V8, there was an stripped spark plug so he's had an insert put in, he's now curious as to torqueing the head back up.

    The original torque setting is 50lbs but as it is an old engine (1939ish) which has been taken apart before is it wise to torque up to 50lbs? The concern being; stripping old bolt threads. He also doesnt want to get new bolts, he'd rather keep it original which I think alot of us can understand.

    So, to torque or not to torque as specified, that is the question.
  2. Da' Bomb
    Joined: Apr 8, 2005
    Posts: 438

    Da' Bomb

    Torque. I would suggest new bolts......Buy there is probably going to be varying opinions...
  3. R Pope
    Joined: Jan 23, 2006
    Posts: 3,309

    R Pope

    If it's a Ford flathead, don't worry about the original bolts. They are better than Grade 8. Henry used good materials.
    A '39-ish Ford would have studs, not bolts, though.
  4. Deuces
    Joined: Nov 3, 2009
    Posts: 18,407

    from Michigan

    Take'um back down to 50ft lbs...
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  5. Sorry, meant studs and if they're better than grade 8 doubtless they can take the strain.

    Haha, yeah yeah alright!
  6. aaggie
    Joined: Nov 21, 2009
    Posts: 2,529


    All of the general rules apply, clean the threads and use good assembly lube and run them down in increments of about ten pounds each round. Some head gaskets have different torque specs so check with the manufacturer and make sure they require the same 50# spec.
  7. If you have a viable reason to suspect the block, studs, or nuts won't hold 50 ft lb of torque you better correct it. Backing off the torque isn't a good idea because you are likely to experience a head gasket leak.
  8. flatjack
    Joined: Feb 13, 2007
    Posts: 885


    45 ft lb should be plenty with studs.

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