Base Gaskets

Discussion in 'Harley Davidson Extreme Modification' started by Bartman420, Oct 26, 2014.

  1. Bartman420

    Bartman420 Member

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    Thinking about doing heads the season. The reason is when the motor was rebuilt, due to wrist pin clips, the heads don't match the pistons. When I pull the heads I'm thinking the base gaskets should be replaced. Is there a problem with simply pulling the cylinders, replacing the gaskets and reinstalling the cylinders?
     
  2. tourbox

    tourbox Senior Member

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    If you're talking about your '03 Heritage then yes you will have to replace the base gaskets.
    When you remove your heads you loosen/ruin the base gasket. Not a good idea to re-use. As far as the cylinders go, if low mileage, just run a ball hone in them to break the glaze. New rings would again depends on mileage.
    One question though, what did you mean by; "due to wrist pin clips, the heads don't match the pistons" Didn't quite under stand that.
    tourbox
     
  3. dolt

    dolt Senior Member Contributor

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    I have removed heads several times without replacing the base o-ring. Usually, the heads will separate from the cylinders easily and, if removed carefully, you will not disturb the cylinder base o-ring. Once the heads have been remove, you can secure the cylinders so they can't be moved from an inadvertent elbow with some 1/2" PVC couplings. When you are ready to reinstall the heads, remove the couplings, carefully place the head gasket and heads and torque to spec. :hii

    [​IMG]

    Also curious about "heads don't match the pistons". I assume that the rebuild was necessary because a wrist clip was left out or came out after assembly. :shock
     
  4. tourbox

    tourbox Senior Member

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    You are once again correct Dolt. I didn't notice it was a Twinkie. They do have O-Rings instead of gaskets. My bad.
    tourbox
     
  5. Bodeen

    Bodeen Well-Known Member Staff Member Moderator Contributor

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    I've done my heads without base o-ring as well. Just dont move the crank while the heads are off.
     
  6. dolt

    dolt Senior Member Contributor

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    If you secure the heads as shown, you can move the crank. So, say you were installing new heads and cams; no worries. Just secure the heads with the PVC couplings and go to work on the cam chest.:hii
     
  7. Bartman420

    Bartman420 Member

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    Tourbox, the motor was first built with SE parts, a wrist pin clip went, tattered the cylinder. Axtell components with flat top pistons were installed. The htcc pro heads use a domed piston if I remember correctly. I've contacted Axtell.....waiting to hear from them.