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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: Lucas1983 on January 16, 2026, 08:02:06 PM

Title: 1993 k1100 coolant dripping from weep hole
Post by: Lucas1983 on January 16, 2026, 08:02:06 PM

Hello everyone,
Before anyone attacks me I did search the topic before starting a new one.  Looking for confirmation here.
Last winter I fully rebuilt my bike, replaced all the seals.  Bike is running great.  Towards the end of the season I noticed few drips of coolant.  It is coming from the weep hole. Nothing major but enough to look at this closer.  I rebuilt the water pump as well, replaced all the seals but not the shaft.  Appeared to be in good shape.  Is it possible the new seal was faulty.  I read here people replaced their seals numerous times before it stoped dripping.  Is that the direction I should be going?  When I bought the bike the radiator cap was also a bit sticky, but I was able to fix that. Maybe the cap has to be replaced as well?
Thank you.

Title: Re: 1993 k1100 coolant dripping from weep hole
Post by: Past-my-Prime on January 22, 2026, 12:56:48 PM

I only had to replace my seals once but I may have gotten lucky.  It is finicky and the procedure outlined needs to be followed precisely or the seal will be a bit off kilter and start to leak again, so I understand.