[Vet_Lars]

Anybody have experience with taking the water pump apart on early Diablo?

looks like there is a set screw behind the pulley, but no way to get a tool on it?
Is the impeller and pully pressed or threaded on…?
Any experience welcome!

 

[SPGlass]

I previously sent mine out to be rebuilt so I can't say for sure but mine is out and looked at it recently and thought it looked like it was pressed. I would like to know for sure if this is correct.

 

[mikael82]

I have gone through parts I have, but did not find waterpump I have, but I do have spare seal kit; so it is servicable, pump seal is on impeller side and it presses seal.
Screw under pulley holds bearing, what I can understand from pictures.

Those are tricky seal types, there must be specific torque, Testarossa uses same seal type and general rule is "don't touch if it is not leaking."

When you get it open, I would love to see those bearings; what numbers they are and so on.

 

[Vet_Lars]

The impeller is screwd on CCW. Use the 2 60mm spaced 6mm holes in both impeller and pully to undo. Use a specific tool, or be creative. Remember CCW threads.

The pulley is pressed on to the shaft. Its pressed so shaft pulley surface is flush.

An allen set screw is holding the shaft/bearing assembly. You only get to it with the pulley removed.

The mechanical seal is pressed into the housing ø40mm and the rotating ceramic part is ø35 on the impeller side.

Impeller is torqued to 30nm.

ANY leads on a replacment seal, lambo part is marked up x20, literally. ???

 

[Vet_Lars]

@mikael82 please take a picture of the spare seal you have, any generic numbers on it?

 

[SPGlass]

The impeller is screwd on CCW. Use the 2 60mm spaced 6mm holes in both impeller and pully to undo. Use a specific tool, or be creative. Remember CCW threads.

The pulley is pressed on to the shaft. Its pressed so shaft pulley surface is flush.

An allen set screw is holding the shaft/bearing assembly. You only get to it with the pulley removed.

The mechanical seal is pressed into the housing ø40mm and the rotating ceramic part is ø35 on the impeller side.

Impeller is torqued to 30nm.

ANY leads on a replacment seal, lambo part is marked up x20, literally. ???

Great info. Thank you! That probably explains why my old impeller had a crack on the side of one of the two holes. They probably tried turning it clockwise.

 

[mikael82]

@mikael82 please take a picture of the spare seal you have, any generic numbers on it?

I had second look; no, seals do not read anything on them. I suspect they are found from more common source, since seal got so many parts in them.

Here is messurments:
Collar hight 10mm
inner diameter (around) 20mm
"white" seal diameter is 35mm

 

[Vet_Lars]

I previously sent mine out to be rebuilt so I can't say for sure but mine is out and looked at it recently and thought it looked like it was pressed. I would like to know for sure if this is correct.

who did your rebuild? My bearing is also bad, so need it completely rebuild

 

[SPGlass]

who did your rebuild? My bearing is also bad, so need it completely rebuild

Sorry, I don't recall the name of the place and can't seem to find it. I believe it was in the northwestern US. I will look through receipts to see if I have it.

 

[Sledge4.2]

just ran across this, i think seller also has remanufactured pumps

NEW LAMBORGHINI DIABLO 1993-2001 WATER PUMP SEAL AND INSTALLATION SETTING TOOL | eBay

 

[Vet_Lars]

Odd that 91 and 92 would be excluded the shaft and seal should be the same…

 

[Sledge4.2]

there are rebuilt units on ebay, with warrenty and core exchange for $400 (or best offer).

 

[mikael82]

I was in luck; there is waterpump for VT -cars that does not have powersteering and many people have bought wrong one; got it cheap.

 

[SPGlass]

I was in luck; there is waterpump for VT -cars that does not have powersteering and many people have bought wrong one; got it cheap.

That's must be what the one was that I bought years ago to scavenge parts off of. I bought it for $150 and used the pulley and impeller (since mine was damaged) off of it to rebuild mine. The place that did my rebuild bought the housing back from me for like $75.

 

[mikael82]

That's must be what the one was that I bought years ago to scavenge parts off of. I bought it for $150 and used the pulley and impeller (since mine was damaged) off of it to rebuild mine. The place that did my rebuild bought the housing back from me for like $75.

Mine is totally new, with pulley and everything.