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Just watched my pride and joy disappear down the road on the back of a truck...

Not sure of the problem at this stage, but when I stopped in the shed last night it dropped a pool of coolant on the floor.
 

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Just watched my pride and joy disappear down the road on the back of a truck...

Not sure of the problem at this stage, but when I stopped in the shed last night it dropped a pool of coolant on the floor.
Oh no! Any trace where is what coming from?
 

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And the reason for the coolant loss?

Dunno.

Checked by the dealer. When I checked it after finding the pool the expansion/ overflow tank was empty. When he checked it, it was fine.

They suggest it might have been overfilled, and when it got hot spat some out through the overflow. Given the last part of my road is on ball-bearing like gravel I travel slowly, and it does get hot. I'd just got through 'having some fun' in the twisties (they stop wher the dirt starts), so it's possible.

Something I'll be watching, particularly as we enter our hot summer.
 

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Wow, unusual for that special fluid to boil over, but I guess it’s possible...
 

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2017 Ducati Supersport, 2015 Ducati Scrambler Classic, 1994 Ducati 907ie
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It is an"expansion tank". The max level mark is only about 1/2 way up to allow for expansion, so it is possible that if it was overfilled beyond the max mark that it would overflow if the cooling system was overheated.
 

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@theresanothersteve Generally, I leave the engine coolant temp on my dash at all times and glance over at it periodically. Perhaps you do the same; by any chance were you observing the coolant temp during that ride?

Kinda puzzling cause it’s not that hot there yet, right?

Also, assume you’ve checked that the fans are working properly, and also that the radiator and oil fins are not clogged, restricting air flow.
 

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The coolant temp defaults to the dash display when the engine starts to get hot. Sorry, I can't remember the temp. I noticed that the first time I rode my bike. I called the dealer and they told me it was normal and the fans don't kick on until over 210 degrees or something like that.
 

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Discussion Starter #9
@theresanothersteve Generally, I leave the engine coolant temp on my dash at all times and glance over at it periodically. Perhaps you do the same; by any chance were you observing the coolant temp during that ride?

Kinda puzzling cause it’s not that hot there yet, right?

Also, assume you’ve checked that the fans are working properly, and also that the radiator and oil fins are not clogged, restricting air flow.
AS LR says, the right-hand dash display reverts to coolant temperature when it reaches 100C. The fans (on my bike) cut in at 106C, you can see the temperature drop as they do their work. I usually only see this happen when lane filtering or stopped at the lights. It also happens on the last part of my trip home, 1 mile of dirt, when the ambient is above about 20C.

The part that puzzles me is the coolant was between low and high when I checked it on Sunday (my weekly ritual is checking oil, water and tyre pressures on all our vehicles every Sunday), but on this occasion the tank was empty. When the dealer checked it a couple of days later they said it was a little overfilled and reduced it so it is just above the low mark when cold.

I'm fussy about coolant now, after destroying the head on a previous vehicle without actually overheating. Gone are the good old days when you could get a red motor Holden home by topping up the radiator (from the tap) each time it boiled.

At least Ducati roadside assist covered the flatbed to get it to the dealer, and the dealer didn't charge me anything.
 

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AS LR says, the right-hand dash display reverts to coolant temperature when it reaches 100C. The fans (on my bike) cut in at 106C, you can see the temperature drop as they do their work. I usually only see this happen when lane filtering or stopped at the lights. It also happens on the last part of my trip home, 1 mile of dirt, when the ambient is above about 20C.

The part that puzzles me is the coolant was between low and high when I checked it on Sunday (my weekly ritual is checking oil, water and tyre pressures on all our vehicles every Sunday), but on this occasion the tank was empty. When the dealer checked it a couple of days later they said it was a little overfilled and reduced it so it is just above the low mark when cold.

I'm fussy about coolant now, after destroying the head on a previous vehicle without actually overheating. Gone are the good old days when you could get a red motor Holden home by topping up the radiator (from the tap) each time it boiled.

At least Ducati roadside assist covered the flatbed to get it to the dealer, and the dealer didn't charge me anything.
My fans come in at 103 C and cut out at 106C.
Oddly I have had the overflow drip on the garage floor when it was only 60C. So I don't think it's only when hot that the pressure builds. Logic tells me it should be but experience shows me it isn't.
 
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