weep hole water pump - Page 2 - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #11 of 18 (permalink) Old 06-30-2020, 05:43 PM
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In general the mechanical seals are pretty good. It is unusual for you to see that much dripping from the weep hole. Usually just drips . if you got a good used pump than go with that. The mechanical seals consist of a ceramic side and carbon side which is spring loaded to keep pressure against the ceramic side . They can be easily damaged during installation. Did you have that pump apart at some time. One of those sides may be broken/cracked.

2013 FJR1300 and other bikes
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post #12 of 18 (permalink) Old 06-30-2020, 06:29 PM Thread Starter
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Quote:
Originally Posted by RaYzerman View Post
If the bike is just sitting there and you fill the reservoir and it starts leaking immediately, it's not the water pump.

However, if the reservoir was full, you ran the bike, cooled it down and the liquid would get sucked into the cooling system. This replaces hot liquid sent to the reservoir, and/or replaces liquid lost from a leaking water pump seal. If it's the water pump seal, it will be under vacuum as it cools down. Pullling the rad cap off, it then should leak again if it's a water pump seal issue, i.e, no vacuum and gravity takes over (even if reservoir empty at that point).
Again, I'm just trying to understand the conditions under which the leak occurs.
so i just went out in the middle of the night to have a look i put my phone under the water pump and recorded to see what was going on since the reservoir was empty i poured some water in it and it didn't leak so i checked what i could do to make it leak once i pulled off the filling cap left hand side(red cap) and this made the leak happen again

so known leaking conditions is when hot and cooling off and when the red cap is pulled once it happens it just pulls all the liquid out of the reservoir

any thoughts?

Sven
1998 Kawasaki KDX 200
1982 Suzuki GSXL 750
1998 Honda shadow vt 600
1996 BMW f 650 Funduro
2005 Yamaha fjr1300a
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post #13 of 18 (permalink) Old 06-30-2020, 07:08 PM
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Can you post a pic of this red cap? Is it the radiator fill cap?

Ray
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post #14 of 18 (permalink) Old 06-30-2020, 07:29 PM Thread Starter
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Originally Posted by RaYzerman View Post
Can you post a pic of this red cap? Is it the radiator fill cap?
yeah thats the one lol

Sven
1998 Kawasaki KDX 200
1982 Suzuki GSXL 750
1998 Honda shadow vt 600
1996 BMW f 650 Funduro
2005 Yamaha fjr1300a
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post #15 of 18 (permalink) Old 06-30-2020, 09:36 PM
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OK you had me all confused about the reservoir, which is an almost clear bottle to collect overflow, and I believe on Gen1 is behind the right side fairing.
You are referring to the radiator/cooling system fill as the "reservoir"... it appears.
So, OK, now I can believe you actually have a leak at the weep hole.... carry on, get your new-to-you-used water pump on there.
I apologize for all the confusion.........

Ray
Keep yer stick on the ice....
2014 FJR1300A - Root Beer (sold)
2009 CBF1000A - Sienna Red
1999 VFR800Fi - Pearl Shining Yellow
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post #16 of 18 (permalink) Old 07-01-2020, 05:50 AM Thread Starter
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Quote:
Originally Posted by RaYzerman View Post
OK you had me all confused about the reservoir, which is an almost clear bottle to collect overflow, and I believe on Gen1 is behind the right side fairing.
You are referring to the radiator/cooling system fill as the "reservoir"... it appears.
So, OK, now I can believe you actually have a leak at the weep hole.... carry on, get your new-to-you-used water pump on there.
I apologize for all the confusion.........
no worries trying to figure out if the pump is the actual problem so any input is helpful to me

cheers for the help

Sven
1998 Kawasaki KDX 200
1982 Suzuki GSXL 750
1998 Honda shadow vt 600
1996 BMW f 650 Funduro
2005 Yamaha fjr1300a
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post #17 of 18 (permalink) Old 07-01-2020, 11:27 AM
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If its coming from the weep hole its the pump.

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post #18 of 18 (permalink) Old 07-01-2020, 11:40 AM Thread Starter
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fixed

Quote:
Originally Posted by cra-z1 View Post
If its coming from the weep hole its the pump.
you sir are correct

i got the new pump and threw it on there let the bike get cold and cool down no leaks

i took the old one apart bc i was curious what happened with it. taking it out and trying to turn it by hand was a lot harder as with the new to me pump as i took it apart i noticed that the rubber seal was cracked at 3 spots when removing it it just broke it was so dry and brittle and there are even cracks on the back of the fan base (see attachment)there are scrape marks on the inside of the housing where the fan was rubbing

cheers
Attached Images
File Type: jpg IMG_20200701_171600.jpg (490.8 KB, 14 views)

Sven
1998 Kawasaki KDX 200
1982 Suzuki GSXL 750
1998 Honda shadow vt 600
1996 BMW f 650 Funduro
2005 Yamaha fjr1300a
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