cooling liquid from overflow tank gushing - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Engine / Exhaust / Cooling
\ From the radiator, through the case and out
the exhaust. If it has to do with the cooling,
engine or exhaust, discuss it here!

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post #1 of 30 (permalink) Old 07-21-2013, 12:32 PM Thread Starter
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cooling liquid from overflow tank gushing

oh my god ive only had bad luck with this bike (vn700)
had it repaired last week for bad rpms etc.
and in past ive had problems with cooling liquid.
but what happened today was awefull.
took her for a trip/cruise and the engine was heating up but no red zone but getting close.
stopped for traffic and felt something hot on my left leg!!!!
and i saw the cooling gushing/spraying on pressure out the side of the overflow tank!
it completely cracked the side (were you can see the line *empty/full)
and it burnt my leg.
ill upload a film on youtube were you can see were.
shocked!!! reserve tank is broken the dealer has really sold me a defective bike.
i have a talk planned with them tomorrow.
about every problem ive had with this and this is also now on the list.
gutted!
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post #2 of 30 (permalink) Old 07-21-2013, 12:44 PM
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I am betting it was slightly low on coolant in the radiator, and when the coolant got hot it boiled, letting off steam into the coolant tank, which in turn broke due to age/being brittle.

Have it replaced, the coolant levels checked, and then have them run / idle the bike to the temp than the fan kicks on, and see if it does it again.

Also, when you get the bike back, double check all fluid levels yourself. I don't trust dealerships really... (too many bikes passing through to care).

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post #3 of 30 (permalink) Old 07-21-2013, 12:48 PM Thread Starter
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i just had refilled the coolant.
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post #4 of 30 (permalink) Old 07-21-2013, 12:49 PM
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Quote:
Originally Posted by juliascox View Post
i just had refilled the coolant.
Did you fill it at the radiator, or the overflow bottle?

I'd have them check/replace the radiator cap if you filled it up @ the radiator.

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
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post #5 of 30 (permalink) Old 07-21-2013, 01:01 PM Thread Starter
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They said fill only at the radiator cap not the tank!

Here's the vid:
http://youtu.be/fcOe-clrMmA
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post #6 of 30 (permalink) Old 07-21-2013, 01:09 PM
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Quote:
Originally Posted by juliascox View Post
oh my god ive only had bad luck with this bike (vn700)
had it repaired last week for bad rpms etc.
and in past ive had problems with cooling liquid.
but what happened today was awefull.
took her for a trip/cruise and the engine was heating up but no red zone but getting close.
stopped for traffic and felt something hot on my left leg!!!!
and i saw the cooling gushing/spraying on pressure out the side of the overflow tank!
it completely cracked the side (were you can see the line *empty/full)
and it burnt my leg.
ill upload a film on youtube were you can see were.
shocked!!! reserve tank is broken the dealer has really sold me a defective bike.
i have a talk planned with them tomorrow.
about every problem ive had with this and this is also now on the list.
gutted!
Left leg? Overflow task is on the right side. There is a coolant house on the left side (rear cylinder) that could have failedif it was your left leg.

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post #7 of 30 (permalink) Old 07-21-2013, 01:19 PM Thread Starter
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correction right leg!
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post #8 of 30 (permalink) Old 07-21-2013, 01:32 PM
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Right leg? Here I was wondering about where to start riding backwards.
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post #9 of 30 (permalink) Old 07-21-2013, 01:42 PM
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Have them check the return hose. If that is cracked or broken it can result in air being sucked back in the system, resulting in the boiling coolant and the steam shooting out. Still leaning towards a bad radiator cap possibly.

That poor VN. I'm hoping for a simple fix!

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
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post #10 of 30 (permalink) Old 07-21-2013, 01:54 PM Thread Starter
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why could it be radiatorcap then?
just for future reference sake how do i prperly fill the right amount of cooling fluid?
is it just the radiator side that i fill or also the overflow tank?
and so you know my fan doesnt work at all the relay is broken it needs bypassing.
it never worked told the dealer that the only thing they said ( well it is an old bike)
infuriating answer btw!!!!
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