Anyone rebuild thier water pump recently?

Why do a rebuild yourself? I got a rebuilt pump for my 308 with a core exchange from East Coast Jaguar in Delaware. (302-475-7200, [email protected]). The owner's name is John. They rebuild the Ferrari pumps all the time and are set up to do it. They use a heftier set of bearings than OEM, and you get a finished product with no muss or bother. Unless you've got a press, doing bearings like that can be a hit or miss proposition, and you won't find out if it leaks until you put it back in. For my money, that's one of those jobs better left to someone who has the right equipment and parts. My $.02

NAYYY, just a very satisfied customer.

 

I Know Nick has new pumps available with the improved impeller and bearings.

 

Search Tech Q&A, esp the old fchat for 'water' 'pump' 'rebuild' or 'seal' or 'bearing'.

I've been rebuilding WPs for so long I don't remember which threads had the most info. These threads might help:
http://ferrarichat.com/forum/showthread.php?t=47191
http://ferrarichat.com/forum/showthread.php?t=58483

 

Not much help, but perhaps a tip for the future.

IIRC, I had trouble getting the inner bearing assembly out. I brought it to a machine shop and they did a little spot weld which shrunk the assembly and they told me it slid right out.

 

I rebuilt mine recently, but I only have about 20 minutes of run time on it, so it isn't exactly proven yet.

The inner bearing has a snap ring holding it in - you pulled that, right?
I used the freezer and oven to grow and shrink stuff to get bearings in and out. I put the whole pump in the freezer overnight and the outside bearing actually fell out when I turned it upside down. It sounds like you already know these tricks, though.

I bought a seal from McMaster, type 409 and modified the pump to accept it as had been discussed on this board. The shaft had to be turned down a little, but it cleaned up all the pitting! I made an aluminum ring to go in the pump body to accept the 409 seal. Then I dropped the seal on the floor and ruined it. Ooops. I went to the local pump rebuilder and she said I wanted a different seal anyway, the 409 is only rated to 250*F and she had one rated at 450*F and 75psi. It was $25, more than double the price of the 409, but I thought it was worth it.

If this sounds like an adventure for you let me know and I have more details. Like I said, 20 minutes so far and going strong! Not for the purists as this permanently modifies the pump shaft.

 

I have had trouble sourcing seals. Do you have a source you can share?

Thanks!

 

Oh...and there are no secrets. I just did this on my Mondial and it was a look at what needed to be done and that's it. Over the years I have done maybe a dozen of these. The hard part for me was finding a source for the seals.

 

I couldn't find any source for the original seal. Part of the problem is that it appears to be metric. In the USA it may as well be from Mars. When will we join the rest of the world? I bet in Europe this seal is easy to get.

I used a PS-447V by U.S. Seal that was about $25 from Bruce Barton Pump in San Jose. The parts lady said that this has higher ratings than the 409 which someone else (is it Birdman?) has been running successfully. This required truning the shaft down to .625" in a lathe, and making a ring 1.437" i.d, and 1.613" o.d. out of a piece of aluminum pipe. My notes say that next time I'd make the o.d. 1.610" - it was a bit on the tight side.

This place sells the seal I used - note NOT the Ferrari seal - seems to part number ASP-447V http://www.sealsales.com/mechanicalseals/Mechanicalseal7.shtml
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