Checking water pump - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 5 (permalink) Old 06-27-2013, 07:54 PM Thread Starter
bamafrankie
 
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Checking water pump

I just returned from a 2 mile ride and noticed water coming from overflow hose in front of rear wheel. The temp guage was only reading about one third (1/3) up the scale on guage and the fan was running. The tank is full, how do I tell if it is pumping coolant. And does the fan work of the same as temp guage.

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post #2 of 5 (permalink) Old 06-27-2013, 08:23 PM
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Originally Posted by bamafrankie View Post
I just returned from a 2 mile ride and noticed water coming from overflow hose in front of rear wheel. The temp guage was only reading about one third (1/3) up the scale on guage and the fan was running. The tank is full, how do I tell if it is pumping coolant. And does the fan work of the same as temp guage.

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The fan sensor, located lower left corner of radiator, activates (on/off) by completing fan circuit to ground.
Your Temp Gauge Sending unit is located near radiator fill cap...operates your temp gauge.
The two operate independent of each other.

........somethings pumping ! ...right out the front of your bike !


'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
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Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #3 of 5 (permalink) Old 06-28-2013, 09:55 AM
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It might have just been overfilled?? or maybe an air pocket.....sometimes these bikes "burp" out air pockets if they don't get ridden hard once in a while.

I would just keep an eye on it for now and as long as you are not overheating, it should be fine.
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post #4 of 5 (permalink) Old 06-28-2013, 12:01 PM
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Could be low enough on coolant that the temp sensor in the thermostat neck is not down in the coolant being it's mounted at the highest point of the system. With the engine cool, I would take the cap off the neck( under right side cover in front of the tank) and add coolant. There is an air bleed valve on the thermostat housing by the temp sensor. Takes a 10mm boxed end wrench. Get ALL the air out. You can pour in coolant all day long but if you don't open the valve you will have trapped air in the system. Fill the coolant full, run the engine up to normal temps, let it cool down and repeat filling steps. Best to loosen the tank and you can just tilt it to the left side just enough to get to the valve. This engine do not like the least bit of air in it's system. It's only 1 1/2 quarts coolant system plus whats in the reservoir. Takes very little in lacking coolant to heat up these engines. Be sure to use a non silicate antifreeze in these engines.

Last edited by Chuck A.; 06-28-2013 at 12:08 PM.
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post #5 of 5 (permalink) Old 06-29-2013, 04:25 PM Thread Starter
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Thanks I've been adding water to the overflow tank cause I didn't see anywhere else to add water now I know. The bike is just smelling hot but guage is showing fine. Had plenty of coolant in system I'm going to check the thermostat

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