On mercedes that I worked on it was mounted on the fender well in the engine
bay.  On the eurovans that I worked on it was on the drivers side right near
the radiator.

By the way it is on the six cylinder eurovans not the five cylinder models.
251 965 561 B additional water pump.

On both vehicles it was not directly in the line of the large hoses but
valved over to them through smaller diameter hoses.

If I read the clamps correctly the pump has 27mm and the rad has 40mm spring
clamps.  About 7/8 and 1.25 inch hoses.

jimt

On 6/25/05 12:22 PM, "' '" <rrecardo@webtv.net> wrote:

>
> <<<That water pump is on the eurovans and several audi and mercedes as
> well. The mercedes I worked on had the pump connected with the cooling
> fan to circulate water when the car is stopped. I believe it is hooked
> up the same way on the eurovans.
> jimt>>>
>
> Prior to taking a ride over to VW to check this out, where is this pump
> mounted?
>
> Is it a rotary in line set up or what kind of pump?
>
> This auxiliary pump would have to be larger in diameter than the hose.
>
> Now, what is the ID of the connection area of this pump?
>
> If it's 1.25", it would work only on the earlier Vans.
>
> 1.50" would work on only the later model's.
>
> If's going to be mounted up front above the spare tire well, I hope that
> it's small enough in diameter to clear the spare.
>
>
> It's hooked up with the fan to kick on when the engine gets hot, or???
>
> I could see a by pass switch mounted under the dash for a long pull or
> high end run in this heat.
>
> It could (?) ( might ) help move some coolant back to the engine or up
> to the radiator.
>
> But the radiator could only handle just so much fluid in any given time,
> so pushing the fluid too fast would be self defeating.
>
> And then we have the old flabby hose treatment.
>
> This pump would kick on, raise the pressure of the fluid, because the
> old plugged up radiator couldn't handle the increased volume, and the
> old hoses would start blowing.
>
> Interesting concept.
>
> A larger 3 or 4 core radiator would get you to the same end result.
> IF you could shoe horn it into the front end ( which isn't going to
> happen )
>
>
>