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  1. #1
    '02GPRider's Avatar
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    External Water Leak

    I'm running a stock cylinder head cut by Lowell. Recently, it developed a water leak around the #2 spark plug from the cover. Luckily, it just drains out the channel in the cover to the port side. It did take out a spark plug, though. I've tried a new gasket and then a gasket with 1211 sealer, but no luck. I've checked both the head and cover for flatness and all looks good. I plan to try another head cover soon. Any other ideas on how to resolve this? Do I have too much water pressure?


  2. #2
    Duke's Avatar
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    After Lowell cut the head did you add a washer under the bolts? If not the bolts might be bottomed out due to less head thickness.

  3. #3
    '02GPRider's Avatar
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    Heads are properly torqued. I'm using shorter bolts. It didn't always do this, either. It started for no apparent reason late last fall and I have yet to figure it out.

  4. #4

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    If both surfaces are flat, then there is a crack in the cover, most likely. I have this same problem, and have found that occasionally cracks have been found right along the bottom of that drain channel. I've had this for a good while, but didn't realize it. My spark plugs were always rusty around the base, but i thought it was from condensation. Not until I ran it on the hose did I see it seeping out there.

  5. #5
    '02GPRider's Avatar
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    I hope you're right! I am trying out a new cover later today after work.

  6. #6
    '02GPRider's Avatar
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    Woohoo, the new cover fixed the leak! I even ran a new best speed today, 77.7 @ 7250 with a new '05 pump. Time to send this prop in for more pitch.

  7. #7
    Duke's Avatar
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    Quote Originally Posted by '02GPRider View Post
    Woohoo, the new cover fixed the leak! I even ran a new best speed today, 77.7 @ 7250 with a new '05 pump. Time to send this prop in for more pitch.

    Great to hear. You can definatly use a little more pitch to. Are you using the 1200 or 800 grate?

  8. #8
    '02GPRider's Avatar
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    That was with an 800 grate and 85mm nozzle.

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