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  1. #1
    Join Date
    Jun 2009
    Location
    italy
    Posts
    56

    Default 1962 283 Chevy rebuiding

    hi all
    does anyone can tell me how harden valve seats to run with modern gas?

  2. #2
    Join Date
    Sep 2010
    Location
    Jersey Shore
    Posts
    4,635

    Default Re: 1962 283 Chevy rebuiding

    I will assume that you want to know if old heads will work with modern fuel. The answer is, no. Do to the absence of Lead in modern fuel, you will have to have hardened valve seats installed in your old heads. I would actually look for a new set of heads.
    Chris
    Dockside Marine Services
    Jersey Shore.
    Mercruiser/Mercury Certified
    Let the insanity begin.

  3. #3
    Join Date
    Mar 2009
    Location
    Portland, Oregon,
    Posts
    9,194

    Default Re: 1962 283 Chevy rebuiding

    The 283 is a small journal engine. It did however, use the F/T pistons.
    And yes..... the valve seats will require replacement.
    Unless there is a need or desire to keep this boat original, I would would go with a much later SBC..... perhaps a 5.7L.

    In either event....... say NO to these.
    Attached Images Attached Images  
    Last edited by RicardoMarine; 12-04-2016 at 10:19 AM.
    Rick ... aka Ricardo..... AQ series Volvo Penta repair
    Portland, Oregon
    28' SDN F/B w/ twin Volvo Penta 5.7L DP's

    Please... no PMs! Post your questions on the forum.

  4. #4
    Join Date
    Jun 2009
    Location
    italy
    Posts
    56

    Default Re: 1962 283 Chevy rebuiding

    thanks guys
    this means that I can not have my valve seats hardened, but I must purchase (on-line? suggestions?) two new heads that will fit with my 1962 engine?

  5. #5
    Join Date
    Sep 2010
    Location
    Jersey Shore
    Posts
    4,635

    Default Re: 1962 283 Chevy rebuiding

    Quote Originally Posted by pietro View Post
    thanks guys
    this means that I can not have my valve seats hardened, but I must purchase (on-line? suggestions?) two new heads that will fit with my 1962 engine?
    You have to find a very good machine shop and have them cut your heads and install hardened seats. If it is not done right the seats will come loose and it will all be over very shortly.

    Heads are not expensive.
    Chris
    Dockside Marine Services
    Jersey Shore.
    Mercruiser/Mercury Certified
    Let the insanity begin.

  6. #6
    Join Date
    Mar 2009
    Location
    Portland, Oregon,
    Posts
    9,194

    Default Re: 1962 283 Chevy rebuiding

    ................................

    Quote Originally Posted by pietro View Post
    thanks guys
    this means that I can not have my valve seats hardened,
    Correct!

    but I must purchase (on-line? suggestions?)
    Read Chris's post #5 again.

    two new heads that will fit with my 1962 engine?
    2 new (or used) cylinder heads must be correct for the 283's 3.875" bore.
    Also, the combustion chamber volume must be correct so that the OEM F/T piston profile can be used!


    DO NOT let anyone talk you into the GM Full Dished piston for this Engine.

    *************************************************

    Here's a good read by Larry Carley.
    http://www.enginebuildermag.com/2003...on-procedures/



    .
    Last edited by RicardoMarine; 12-05-2016 at 11:03 AM.
    Rick ... aka Ricardo..... AQ series Volvo Penta repair
    Portland, Oregon
    28' SDN F/B w/ twin Volvo Penta 5.7L DP's

    Please... no PMs! Post your questions on the forum.

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