Another stupid inconel question...
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Another stupid inconel question...

  1. #1
    Member lucky cat's Avatar
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    Default Another stupid inconel question...

    I have searched all the threads here and other sites and see conflicting information about inconel-super alloy-extreme duty exhaust valves...however you call them...my question is i just picked up a set of Keith Eickert pro 1 heads from a guy who parted his spare boat motor. he bought them from KE site new bare head with valves only...i brought them to my builder and he seems to think the exh. valves are not inconel...ive heard check with a magnet and it should stick half up the stem to the tip only and not the head also they might not be magnetic at all is there any sure fire way to tell? by the way there manley valves...only date code on them no part #...I know most are going to say when in doubt replace them,cheap insurance and i prolly will,but still want to know...Thanks...Kevin

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  3. #2
    gn7
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    You really need to seek out another machine shop. Seriously!

    Inconel is not magnetic. Its primary alloying metal is nickel. Some Inconels are magnetic under certain extremely low cryogenic temps, but not normal room temps.

    I REALLY REALLY don't understand the "halfway" comment. the valves are one piece. Welding Iconel is a bitch. It would be much easier and cheaper to just make them one piece.

    KE heads are assembled with Inconel valves.
    Last edited by gn7; 02-18-2012 at 09:18 PM.
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  4. #3
    Member lucky cat's Avatar
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    Quote Originally Posted by gn7 View Post
    Some Inconels are magnetic under certain extremely low cryogenic temps, but not normal room temps.

    I REALLY REALLY don't understand the "halfway" comment. the valves are one piece. Welding Iconel is a bitch. It would be much easier and cheaper to just make them one piece.

    KE heads are assembled with Inconel valves.
    I was told from a tech. at Manley that the tips to part way down the valve stem is magnetic cause it is heat treated...thats what i ment...

    ..Stroke it,
    ......Blow it,
    .........Get it Wet...
    HTM

    High Torque Marine

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