Water pump replacement

baggerman · Nov 26, 2024

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.

Valera · Friday at 11:08 PM

My dealer replaced the water pump on my 22 sf v4s under warranty but didn't change the oil

- is this ok?

Valera · Friday at 11:29 PM

I certainly asked for an oil change at my expense after that - just wondering if that's technically part of the replacement process?
as I can see in shade's guide

shade said:
First is to drain the oil and coolant.

Astral11 · Saturday at 3:29 AM

He would have to change the oil with the right side engine cover being removed

aque0us · Saturday at 10:55 AM

Not necessarily, the oil level is right at the bottom of the right side cover, but yeah, prolly should have

Valera · Saturday at 11:09 AM

Great thanks guys for your thoughts!

theclaw · 2025-02-13T06:07:06-0800

My 2020 has pretty low miles, just a shade over 2,000. Most of them track. When ordering a new pump for a pre-emptive replacement how do I know I'm getting the latest revision part? Does anybody have the part number handy?

SirJAG · 2025-02-13T06:26:01-0800

theclaw said:
My 2020 has pretty low miles, just a shade over 2,000. Most of them track. When ordering a new pump for a pre-emptive replacement how do I know I'm getting the latest revision part? Does anybody have the part number handy?

ducati omaha...oem part finder....click on 2024, find the part in the pdf....then cross check part number with 2020

then report back haha...i have a 2020 and i may do same preemptive work

jag

Astral11 · 2025-02-13T06:58:05-0800

If you're handy enough to separate the driving gear and circlip from the water pump and want to save a few dollars, the pump part number itself is 2I24920511K

If you want a new driving gear and fully assembled unit that you only have to bolt on, the pn is 24920612A

I wouldn't recommend trying to replace the seals on the engine cover side. It can be done but they're press fit, the magnesium is easy to mar

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Water pump replacement

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