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  1. #1
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    Plugged weep hole?

    I was working on my '81 Custom the other day and it appears that a previous owner(probably not the one I bought it from) plugged the weep hole coming from the mech seal socket. I'm not sure what it's made of or how they put it in, but there is definitely something plugging the hole and it looks deliberate. Any suggestions on how to get it out?
    1981 CX500 Custom

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    Super Moderator ramprat06's Avatar
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    It could probably be carefully drilled out, being sure not to go too deep. There are some clear photos of how it's oriented, I'll see if I can dig it up.

    If it's JB Weld, it will be a very hard task to get right. Got any pictures to show us?
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    Senior Member izak's Avatar
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    Try spraying liberal quantities of Q20, or similar, into the hole with the straw that comes with the can, to try to soften whatever is embedded in the channel . I have used a small 2mm "bottle brush" with good effect after the Q20 squirts. I suppose it depends on what is in the channel , but I think Carb cleaner will also be effective and not harmfull to the mechanical seal or the rubber oil seal ? Please depend also on other members' advice and opinions before you dig in
    Last edited by izak; 05-18-2017 at 11:20 PM.
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    Super Moderator ramprat06's Avatar
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    The red straw from a spray can is used here to point out the orientation.





    As you can see, the depth into the mechanical seal area is very tight. Doing this without removing engine needs a very steady hand.

    Where ?

    There !!



    Instead of a steel stick You can use a 3.0 or a 3.5mm drill to clean this bore.

    Last edited by ramprat06; 05-18-2017 at 12:29 PM.
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  6. #5
    OCR
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    If you use a drill bit, turn it with your fingers or use a hand drive.
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    Senior Member izak's Avatar
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    Yes. A suitable size drill bit will be the instrument of choice cleaning out the crying hole. NOT this Graig-Brush that I used ?
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    OCR
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    The T-chuck that comes with a tap set is handy for this kind of work.
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  10. #9
    Senior Member Thumper's Avatar
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    The only reason he would have done this is if the mech. seal was leaking. Eventually the pressure of the coolant will get past the oil seal and get into the crankcase, which it might already be doing. Is your oil showing evidence of this? Also check the underside of your valve covers for milky build-up. At minimum you might have to pull the carbs and do the Shep's.
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    I appreciate the input guys. The engine is already out of the frame for a bypass, so it'll be pretty easy to access. I'll try using a t-chuck and a drill bit tonight. I'll also try to remember to take a couple of pictures. Thanks!

    Edit: Wasn't able to work on that part of the bike last night, but I should be able to today. As for the oil, it looked clean when I drained it, but for all I know the previous owner could have changed it to hide the issue. Valve covers were also clean.
    Last edited by chasethebarber; 05-31-2017 at 04:59 AM.

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