Coolant leak - MVAgusta.net
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post #1 of 25 (permalink) Old 02-09-2014, 01:13 PM Thread Starter
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Coolant leak

Just got back from a short ride to notice there was blue coolant dripping (more like a slow pour) out the bottom onto the garage. I have a pic where it looked like it was coming from. Any ideas on where to check, or what might be causing this?

This is an '06 F4 with only 3,700 miles
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post #2 of 25 (permalink) Old 02-09-2014, 02:01 PM
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The overflow pipe ?
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post #3 of 25 (permalink) Old 02-09-2014, 04:00 PM Thread Starter
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I went to add water (it's all I had at the moment) to the coolant tank located under the ignition. As I was pouring it in I noticed it was flowing out of the tube shown in the middle of this pic.

I'm hoping someone can educate me on what this might all be about...if needed I'll take it to the shop....
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post #4 of 25 (permalink) Old 02-09-2014, 04:05 PM
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well that is the overflow tube Chris so you had probably overfilled the header tank, that's all.

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post #5 of 25 (permalink) Old 02-09-2014, 04:24 PM Thread Starter
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I did not recently change the coolant. this coolant has been there for well over a year now. Can this just happen out of the blue? I'm hesitant about taking it on the road to far from the house...
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post #6 of 25 (permalink) Old 02-09-2014, 07:34 PM
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Chris, coolant being pumped out due to overfull systems are well documented. Make sure your bikes is upright when you check coolant level, DO NOT fill past the MIN level.

Maybe the weather was just warmer on your ride this time. Maybe the coolant was not coming out of your overflow pipe when you where riding, but rather from the tell-tale hole at the bottom of the waterpump. It's easy to confuse the two.

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post #7 of 25 (permalink) Old 02-09-2014, 08:28 PM
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Wink leaker?

probably the overflow like Joe and Donsy said

but it could be the water pump, there is a weep hole at the base of the water pump where the pump goes into the cases, on the bottom side, look for coolant stains

there appears to be a drop of oil on your drain plug.....check the torque on it and the pan bolts they are notorious for loosening because of where the side stand mounts

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post #8 of 25 (permalink) Old 02-09-2014, 08:51 PM
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MVs like to mark their territory with coolant after a hot ride. Both my 750 and my 312 have done it. Fill the reservoir a bit above minimum and go for another ride. When you get back home, pop the fairings off and watch for drips. More than likely from the coolant overflow. Just keep your level at or just below the minimum mark and you'll be fine.

As for the possible oil leak, check the two 6mm Allen mounting bolts that hold the side-stand mounting bracket. I just had to tighten them on my bike because I had a couple drips here and there.

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post #9 of 25 (permalink) Old 02-09-2014, 09:07 PM Thread Starter
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Thanks guys. Sounds like a great opportunity to go ahead and pick up the water pump and fan upgrades.
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post #10 of 25 (permalink) Old 02-09-2014, 09:26 PM
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They work wonders. My 312 has them and it's a surprising difference. Riding in traffic in triple digits is still exhausting, but it's much better than with the plastic fans and factory impeller.

Best of luck!

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