Water Pump leaking after coolant change? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 4 Old 04-28-2014, 01:41 PM Thread Starter
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Water Pump leaking after coolant change?

Changed the coolant (and checked the valves, synced the throttles ... ) and watched everything carefully when I started the engine for the first time and let it warm up idling. Everything seemed fine except for a few drops of coolant leaking out of the coolant pump drain hose while it was warming up. I had never noticed that before but then I would normally not warm up the engine in the garage, I would just ride it. So it may have been doing this for a while. Coolant level in the expansion container was closer to the low level but not alarmingly low.

So is there anything I could have messed up when changing the coolant? Not properly burped (air in the system)? The system warmed up normally, air bubbles were venting through the expansion container and finally the radiator fan came on (normal temperature bars showing) and I turned the engine off. It seems its leaking only when not up to temperature and full pressure. Could that be? Normally you would think that it leaks more under pressure.

Your knowledgeable advice is much appreciated. :-)

....
Blau1 2004 DL650-sold
Blau2 2014 DL1000A
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post #2 of 4 Old 04-28-2014, 01:53 PM
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Blaustrom, I am confident what you are seeing is normal and of no worry. I have experienced the same thing after removing/refilling my radiator for maintenance or repairs. Keep an eye on your coolant level and be sure to bring it up to the "high" mark. You should be fine. For what it's worth, when I drain my system, I refill to the high mark without burping at the water pump. After a few miles of riding, the air burps out, and I then top off the coolant level again. I usually need to about 6- 8 oz. or so. Has worked fine for me at 24,000 miles.
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post #3 of 4 Old 04-29-2014, 02:05 PM Thread Starter
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Quote:
Originally Posted by UncleRandy View Post
Blaustrom, I am confident what you are seeing is normal and of no worry. I have experienced the same thing after removing/refilling my radiator for maintenance or repairs. Keep an eye on your coolant level and be sure to bring it up to the "high" mark. You should be fine. For what it's worth, when I drain my system, I refill to the high mark without burping at the water pump. After a few miles of riding, the air burps out, and I then top off the coolant level again. I usually need to about 6- 8 oz. or so. Has worked fine for me at 24,000 miles.
OK,

thanks for your comments. I will keep watching it and have an eye on the reservoir. Thanks :-)

....
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post #4 of 4 Old 04-29-2014, 03:39 PM
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Same thing happened to my Vee when I took it down for valve check, throttle body check, etc. The bike was apart for about a week and I found a dime sized puddle 3x, from the small weep/drain hose, after putting it back together. My best guess, the seals, now dry during the teardown, just shrink ever so slightly and it takes them a bit of time to expand back to normal.

Jim

Last edited by Kurgan; 04-29-2014 at 03:45 PM.
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