Water pump replacement

baggerman · 2024-11-26T04:09:33-0800

Spud312r said:
Can someone explain what increasing the Pumps shaft diameter has anything to do with the radiator water pressure and weak pump seals ??

I have had 3 water pumps go on my 2018 V4s track bike and was told my 4th pump was rev 7 !!!
I also never had any high temperature signs, as the dash stayed in its normal zone

Obviously I sold the bike in 2023 after that 4th pump was installed as I had no confidence in the engine and didn't want to get fluid on my back wheel, I was looking at the new model but Ducati wouldn't tell me what was causing the pump to fail....

I do like the temporary fix of adding fluid pipes to the output of the pumps scavenge ports - saves crashing for sure, but still only a plaster on the problem

Even with the 2025 model, the engine is basically the same, what makes you think they have changed the pump design ?!?!?!?!

The seal thing is a bit hard to explain. As the shaft diameter is increased the seal face loading can be kept the same as the seal is being made thicker and more robust and more resistant to being overwhelmed by excess pressure. I don't think there was seven water pump revs. Less water pump revs than oil pump revs (4?) I think. I did read a press release about the entire cooling system (water and oil) being revised on the 25's. When the 2025 parts PDF's show up I expect we'll see another pump rev.

Water pump replacement

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