Question about Kohler K-3386-0 Rialto one-piece round-front toilet with seat and left-hand

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How do we replace the seat on a Kohler K-3386-0 Rialto one piece toilet? The screws/nuts holding the seat down are inside the toilet and aren't accessible. Is there a way to replace the seat without having to replace the entire toilet?

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Kohler will try to sell you $46 anchor bolt kit 84999 & also there special tool. You should expect that for a $400 toilet.

Try this instead:
1. Use 1/8" drill bit and drill and drill around the bolt until the anchor material can be removed.
2. Carefully clean hole with 11/32 drill to remove all remaining acchor material.
3. Go local hardware store & buy a 10 - 32 3/8"X3/4" rubber expansion plug (make certain threaded part is brass & has shoulder on 1 end), a 10 - 32X1.5" Phillips bolt and couple of small fender washers fit the seat.(about $4 for 2)
4. Assemble carefully not to over tighten and crack the porcelain.

Hope it helps

Posted on Oct 07, 2010

  • grilco
    grilco Oct 09, 2012

    Excellent post and it works. You don't need the kit.

  • D Cheng Nov 16, 2012

    In step 1, do you mean to drill the actual top of the anchor itself (the ring around the bolt) and try to break/destroy the anchor?

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