whats this hole for?? - MVAgusta.net
 
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post #1 of 10 (permalink) Old 07-07-2009, 08:38 AM Thread Starter
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whats this hole for??

need help..... i am getting a coolent leak from the back of the waterpump housing and i think this hole could be the problem, just wondering what it is for and if it is ment to be sealed?

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post #2 of 10 (permalink) Old 07-07-2009, 08:48 AM Thread Starter
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did a bit of research and found this

http://mvfaq.blogspot.com/2005/08/wa...p-leaking.html

this bike is starting to shit me
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post #3 of 10 (permalink) Old 07-07-2009, 08:48 AM
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I just disassembled my waterpump and based on the location of the hole I can't see why that would cause a leak. It's inside the waterpump. The only thing that would cause a leak at the water pump would be a bad gasket or a leaking hose/clamp. Unless, (bite my tongue and hope this isn't the problem) you have a crack in the engine case. Make sure it's not coming from the overflow hose. Mine did that once because of too much coolant.

Last edited by number2; 07-07-2009 at 08:52 AM.
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post #4 of 10 (permalink) Old 07-07-2009, 09:26 AM
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I had the same issue replaced #19 8000A6708 and hasn't leaked since.
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post #5 of 10 (permalink) Old 07-07-2009, 09:49 AM
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That hole might serve the same purpose as the hole on car water pumps. IF the seal for the water impeller shaft starts to fail it will seep through that hole and out of the engine to let you know that the seal is failing. But I am not 100% sure.
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post #6 of 10 (permalink) Old 07-07-2009, 01:20 PM
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My water pump was weeping a little until I upgraded the shaft to the new design.
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post #7 of 10 (permalink) Old 07-07-2009, 01:35 PM
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Perhaps they were trying to lighten the f4 a bit more. LOL.


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post #8 of 10 (permalink) Old 07-08-2009, 12:01 AM
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That is the "weep" hole for the mechanical seal in the water pump. It gives coolant an escape point when the seal leaks somewhere besides into the engine. All bikes (and car) water pumps have that.

Slight seeping from the mechanical seal may stop as it beds in (new bikes or new pumps). Believe it or not, some manufacturers put "stop-leak" into the coolant on all new vehicles so customers don't get upset needlessly ( the good stuff is actually a lubricant that helps the mechanical seal bed in). You might try some of that before you replace the seal.

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post #9 of 10 (permalink) Old 07-08-2009, 03:09 AM
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Quote:
Originally Posted by esq'z me View Post
That is the "weep" hole for the mechanical seal in the water pump. It gives coolant an escape point when the seal leaks somewhere besides into the engine. All bikes (and car) water pumps have that.

Slight seeping from the mechanical seal may stop as it beds in (new bikes or new pumps). Believe it or not, some manufacturers put "stop-leak" into the coolant on all new vehicles so customers don't get upset needlessly ( the good stuff is actually a lubricant that helps the mechanical seal bed in). You might try some of that before you replace the seal.

Is the correct answer. If left to get worse you'll end up with coolant in your engine.
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post #10 of 10 (permalink) Old 07-08-2009, 04:15 AM
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i thought this thread was gonna be better then this with that title.
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