Waterpump Exploded

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baggerman

baggerman

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View. I have (now more like had) a first rev (?) pump from a 2019. So I took it apart. These are not intended to be rebuilt the bearing(s), impeller side seal and the impeller are press fit, the bearing and the seal are pressed into blind holes machined from opposite directions. A couple of pictures of the pump (with the engine side seal removed).
IMG_4911.jpg

IMG_4911.jpg


IMG_4907.jpg

IMG_4907.jpg


IMG_4910.jpg

IMG_4910.jpg

You can disassemble these by cutting off the impeller than heating the housing then using a long rod in a press. The impeller and impeller side seal cannot be saved. The main shaft bearing assembly is not exactly what I expected. I expected 2 separate bearings. Instead Ducati grinds the bearing inner race tracks (2 separate ones) into the main shaft (I totally get the logic of this). The bearings are grease packed and sealed with regular grease style seals. On this one the bearing got hot enough that a portion of the grease ended up in the 5mm space that exists between the bearing and impeller side seal. This is where the leak hole in the casting is run into.
IMG_4930.jpg

IMG_4930.jpg


IMG_4924.jpg

IMG_4924.jpg

The impeller side seal is a totally enclosed seal system. The seal which is double lipped, with the outer most lip spring loaded, runs on an ID sleeve which is sized to be a press fit on the bearing shaft. I did my best to not destroy the seal getting it apart.
IMG_4926.jpg

IMG_4926.jpg


IMG_4929.jpg

IMG_4929.jpg

IMG_4932.jpg

IMG_4932.jpg

 
Coolant absolutely dumping out of the weep hole located behind the front tire. Not dripping, pouring out into big puddles until the engine cooled down enough for the overflow to not boil over.

There was a similar crack in each OEM water pump
 
Do you have a picture of the crack? That's odd for sure. I can't say I've ever read of that happening before, let alone to three pumps.

What one typically calls a weep hole is a hole that exists on the body of the water pump purposefully placed to allow leaking coolant a path to escape. The later (2022+) bike ran a hose from the weep hole as well as the coolant overflow tanks to the same spot in the lower fairing.

I'm not dismissing you've been through three water pumps, but merely stating it's possible to have coolant discharge from the lower fairing and it's a condition of the bike overheating and not a failed water pump.
 
Picture? Nah I don’t fix my bikes. That’s what warranty’s are for. My Ducati dealership fixed it under warranty with Bolonga’s blessing each time.

But here’s a pic after riding it to the dealer a few miles away from my house.
 

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fire said:
Coolant absolutely dumping out of the weep hole located behind the front tire. Not dripping, pouring out into big puddles until the engine cooled down enough for the overflow to not boil over.

There was a similar crack in each OEM water pump
Click to expand...
Same as mine. Dealer defiantly would not change the water pump. They swapped out the cap which was allegedly 0.1 bar or psi (I forget) out of spec
 
Is there a youtube going through the procedure to R&R the pump?

I have a pdf of the manual excepts it's the kind where you have 20 different pdf files. Not indexed well.
 
Last edited:
BP PanigaleV4S said:
Do you have a picture of the crack? That's odd for sure. I can't say I've ever read of that happening before, let alone to three pumps.

What one typically calls a weep hole is a hole that exists on the body of the water pump purposefully placed to allow leaking coolant a path to escape. The later (2022+) bike ran a hose from the weep hole as well as the coolant overflow tanks to the same spot in the lower fairing.

I'm not dismissing you've been through three water pumps, but merely stating it's possible to have coolant discharge from the lower fairing and it's a condition of the bike overheating and not a failed water pump.
Click to expand...
The weep hole can be easily filled with silicone/three bond if you use too much during assembly. BTW this motor was assembled with a black sealant that seems to be silicone. If you plug the hole and the seal fails, you'll eventually get water in the oil (on this rev anyway). We should try to get hold of a newer one to see the changes. The inner sleeve and seal are pushed on simultaneously. I think if the sleeve was pressed in too far such that the inner face of the sleeve was rubbing on the face of the seal when assembled bye, bye seal. This pump never leaked, 14K miles.
 
Note on the pump mainshaft that the dia of the shaft is reduced at the seal interface. And that the seal itself is smaller than the bore it is pressed into (there's a trough around the outer dia). Weird. I get that it's an angular velocity thing but the bearing seals are being run on a bigger dia.
 
Last edited:
baggerman said:
View. I have (now more like had) a first rev (?) pump from a 2019. So I took it apart. These are not intended to be rebuilt the bearing(s), impeller side seal and the impeller are press fit, the bearing and the seal are pressed into blind holes machined from opposite directions. A couple of pictures of the pump (with the engine side seal removed).
IMG_4911.jpg

IMG_4911.jpg


IMG_4907.jpg

IMG_4907.jpg


IMG_4910.jpg

IMG_4910.jpg

You can disassemble these by cutting off the impeller than heating the housing then using a long rod in a press. The impeller and impeller side seal cannot be saved. The main shaft bearing assembly is not exactly what I expected. I expected 2 separate bearings. Instead Ducati grinds the bearing inner race tracks (2 separate ones) into the main shaft (I totally get the logic of this). The bearings are grease packed and sealed with regular grease style seals. On this one the bearing got hot enough that a portion of the grease ended up in the 5mm space that exists between the bearing and impeller side seal. This is where the leak hole in the casting is run into.
IMG_4930.jpg

IMG_4930.jpg


IMG_4924.jpg

IMG_4924.jpg

The impeller side seal is a totally enclosed seal system. The seal which is double lipped, with the outer most lip spring loaded, runs on an ID sleeve which is sized to be a press fit on the bearing shaft. I did my best to not destroy the seal getting it apart.
IMG_4926.jpg

IMG_4926.jpg


IMG_4929.jpg

IMG_4929.jpg

IMG_4932.jpg

IMG_4932.jpg

Click to expand...
Nice work
 

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