Question about Kohler - Toilet - Two-piece - Highline - K3427-RA-G9

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What could be the cause of leak after installing new gaskets and screws, above back/rear screw? 1) not from screws 2)tank not cracked 3)securely tightened all 3 screws 3a)hand tightened(only)large flush valve nut

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Hello, W/D here.

Most probably, the tank-to-bowl gasket has not seated properly. They are usually neoprene, and tend to bight on the bowl socket rather than to slide into the socket where it can be compressed properly. Remove the tank bolts and look at the gasket. Re-install, using a water based lubricant on the bowl side, with the gasket installed on the tank flange. Wiggle the tank and gasket back and forth a few times, and the gasket will start properly into the cast socket on the bowl. Install the bolts and tighten to finger tight. Wiggle the tank a bit more, and level the top. Tighten the bolts uniformly.
You mention that the flush valve was hand tightened only. If this gasket is not snug (a bit more than hand tight), a leak can occur there as well.
Best regards, --W/D--

Posted on Apr 05, 2011

  • Dave Murphy Jan 21, 2012

    We too have experienced a steady leak through the bolts securing the tank to the bowl. We have adjusted the tank by wiggling the tank and gasket back and forth, re-tightened the bolts and still have a leak. We replaced the tank, installed the new one and have the same problem. Should we simply be able to place the tank on top of the bowl, tighten the bolts, and be able to use the toilet without it leaking? Is there a step that we are missing? Thanks!

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We have a toilet problem now for 8 years since we bought our place,the toilet leaks onto our bathroom floor we know where the leak is someone have put silicone around the plastic valve right @ the bottom...


With out seeing it, it is hard to actually know what the problem is, but it sounds like it is either where the water line enters the tank, or the gasket between the tank and the bowl. Either way there should not be any silicone. The water line flows into the fill and shut off valve. If it is leaking from there get a whole new valve for under $20.00. For the gasket between the tank and the bowl you have to remove the tank and replace the gasket.

What many people are unaware of is a small crack in the tank and rarely a small crack in the bowl. If the leak is not from one of the two things I mentioned above it has to be a crack and in that case a new toilet.

If you can not tell where the water is coming from it could be a crack or the wax ring under the toilet may need replaced. You might want to call a plumber and get a free estimate on what the problem is.

Good luck with this.

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1 Answer

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REMOVAL & INSTALLATION

323, Protege, 520-22 626 and MX-6 and 522-24 MX-3 Models
See Figures 1 and 2

  1. Relieve the fuel pressure and disconnect the negative battery cable.
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0900c152802612b0.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 1: Detach the fuel hoses and electrical connections from the fuel pump, then remove the attaching screws and the pump


0900c152802612b1.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 2: Exploded view of the fuel pump assembly for the 323, Protege, 520-22 626, MX-6 and 522-24 MX-3

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3 Answers

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1 Answer

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