Replacing the Jägermobile Water Pump Again!

[Paul]

Hope this one lasts until at least 300K!

[jaykay]

So I assume the red letter box is the new genuine Porsche water pump? Yes there are OEM manufacturers that are not genuine Porsche which can be confusing. Another example is Pieburg...something like that anyway

I remember catching some chatter on another forum indicating that Lasos fail early

[southernstar]

Thanks Jager for clarifying on the brand of the waterpump that failed so rapidly. While we will never know whether the Porsche part would have lasted longer or not, I am certainly planning on replacing mine with the factory part when the time comes. And yes, I have decided that I will not replace the pump until there are signs of failure, in spite of the urgings of some others.

In the interim, I am careful not to open the coolant expansion tank when the engine is warm as per Pedro's advice. When I replaced my serpentine belt this spring, I checked out the pump for signs of leakage or play in the pulley and all seemed good. There is also no discernible bearing noise when it is running. I also decided not to replace the lifetime coolant as, it strikes me that if there is a problem with the bleed, I am more apt to cause an impeller failure than if I leave well enough alone. When (or perhaps if considering Pedro's waterpump life) I need to replace the pump, then I will have the system flushed and the coolant replaced. I am also holding off on replacing the thermostat with a 160 degree unit for the same reason. Until then, I am leaving well enough alone.

It might be interesting to see if those who suffered early pump failure had previously had the system flushed and coolant replaced, or had required replacement of the coolant expansion tank, or had replaced the thermostat, or had been opening the coolant expansion tank when the engine was hot. Furthermore, if the system had previously been bled, what method was used.

Brad

[jaykay]

Just got hold of my new pump.

I find the drag on the pump bearing quite high. You can hear as you spin it and it does not spin for very long maybe two revs before it stops.

Is this normal?

[944boy]

The LASO I put in failed within 30K miles. It blew apart. I replaced it with a factory part. There were clear differences in machining quality. I also used the Airlift tool and after filling have never had to do any extra bleeding. Fast and precise, I would recommend nothing else.

failed laso:




comparison:

[Jager]

Originally Posted by 944boy

The LASO I put in failed within 30K miles. It blew apart. I replaced it with a factory part. There were clear differences in machining quality. I also used the Airlift tool and after filling have never had to do any extra bleeding. Fast and precise, I would recommend nothing else.

Wow! Didn't the pump make some noise before blowing-apart?

[jaykay]

Originally Posted by jaykay

Just got hold of my new pump.

I find the drag on the pump bearing quite high. You can hear as you spin it and it does not spin for very long maybe two revs before it stops.

Is this normal?

Anyone have comments on this?

[AKnowles]

Originally Posted by jaykay

Anyone have comments on this?

The pump has a lot of drag. Even the new one I installed will not spin for long. But it should feel smooth with no side to side interaction/drag. Mine was off center and was slowly scoring the top bolt. You could see it when the engine shield was removed.

[944boy]

jaykay - I'm pretty sure the OEM pump had a bit of drag but was smooth and tight. It did not spin much at all after you let go. As long as you don't hear any scraping or irregular sounds you should be good.

As far as sounds when mine blew up, I had my head under the car earlier that day or the day before and heard nothing too strange. While driving I heard an intermittent squeak/squeal/chirp that I attributed to the Ferrari 308 in front of me. I'm not sure if that was me or not but but 10 or so miles later there was steam coming out the back and at low speeds it sounded like a bag of rocks being shuffled around.

And as far as leaking, the coolant tank had not lost any fluid in nearly 2 years. So it was not dripping any coolant before it failed either.

-Greg

[Jager]

Originally Posted by Paul

Hope this one lasts until at least 300K!

Thanks Paul... Me too.