Coolant leak - BMW R1200GS Forum : R1200 GS Forums
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post #1 of 11 (permalink) Old 18-Oct-2016, 03:49 PM (867) Thread Starter
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Coolant leak

Does anyone know why this hole is here and why coolant seems to be coming out of the hole.
I am taken it to dealer tomorrow.
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post #2 of 11 (permalink) Old 18-Oct-2016, 06:54 PM (996)
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My guess that is a "weep" hole for the water pump/area. Seems to have a water pump or conection leak. My .02

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post #3 of 11 (permalink) Old 18-Oct-2016, 09:46 PM (115)
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Quote:
Originally Posted by rsmith View Post
My guess that is a "weep" hole for the water pump/area. Seems to have a water pump or conection leak. My .02
I was going to say the same thing, most water pumps have some form of weep hole just after the pump seal to let you know when the seal is about to go.

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post #4 of 11 (permalink) Old 19-Oct-2016, 11:56 AM (705)
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Some leakage there is normal. At least BMW calls it normal. The story is that if the pressure gets two high the O ring will deform and let a little out through the weep hole. Something like that, anyway.

On my bike I sometimes see some splatter after working the engine hard, e.g. climbing twisty mountain passes that keep my in 2nd or 3rd gear or running low speed on dirt roads. When I get home I wipe the splatter off.

Check your coolant level. If it's not going down much there is nothing wrong (again, according to BMW). I now top off the coolant most services. The pic shows how much I lost in 6K miles. That's 2-3 oz -- not all that much.

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post #5 of 11 (permalink) Old 19-Oct-2016, 04:55 PM (913) Thread Starter
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I drop my 2015 r1300gs off at the dealer. They are going to change the water pump. I was told that Bmw knows there a issue.
They were not sure if the pump had any update changes to it.
They told me that they had run in the spring changing water pumps.
Good news they also told me that they haven't seen one come back once they change the pump out.
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post #6 of 11 (permalink) Old 20-Oct-2016, 08:40 AM (570)
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I agree with marc and my experience has been about the same in that on occasion there is visible fluid around the weep hole.

There is a difference between a small amount of coolant (a weep) which is normal and a blown seal that leaking, and generally speaking if you rarely have to add coolant you don't have a leak.

Here is a good piece of literature explaining the weep hole written by one of the largest water pump makers in the world (Aisin): http://aisinaftermarket.com/uploads/...4516276_en.pdf

I personally prefer that a dealer only does warranty repairs that are 100% necessary on my bike, it is my experience that the reliability of my bike is only as good as the last mechanic to have worked on it.
I have heard of many of these pumps weeping tiny amounts of fluid but have yet to hear of a seal blow out leaving anyone stranded.

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post #7 of 11 (permalink) Old 20-Oct-2016, 10:04 AM (628)
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Here's a pic of my failed water pump. Note the emulsion of water and oil from the weep hole. Thus according to the 2nd mechanic that replaced it stated that it should have been replaced by the Service department that I had originally complained too after a 3,000 mile trip to the South West.
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post #8 of 11 (permalink) Old 22-Oct-2016, 04:56 PM (914)
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Weep hole.

I understand that your problem has been already fixed but while my engine is apart I thought I'd clarify what the weep hole is.
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post #9 of 11 (permalink) Old 24-Oct-2016, 05:01 PM (917) Thread Starter
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The picture help a lot showing the weep hole. I got my bike back and took it for 300 mile run no fluid. I still have a hard time accepting it leak sometimes. My other bikes and snowmobiles and vehicles only leak when there was issue. BMW ?????
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post #10 of 11 (permalink) Old 24-Oct-2016, 05:18 PM (929)
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A small amount of fluid that has weeped out and a leak are two different things, most vehicles do not have a weep hole that is in such a conspicuous location so you wouldn't notice if it were weeping slightly.

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