Dr Whoopie

Hi everyone:
My electric pump started making a loud humming sound after shut down, intermitently. Now I started hearing the pump noise while driving. Do I need to replace a switch as well or some temperature sensor? Also wondered how difficult this to remove and replace?
Thanks in advance for any help in diagnosing and repair.

Luis de Prat

There is a relay that controls the pump. Pull it out and put it back in to see if this changes anything, or try swapping it with a known good one from another car.

If you decide to replace the pump, this is pretty well explained in the factory manuals. You will need 3 hose pinchers. I got mine from SnapOn.

xsboost90

my pump started making this noise when the motor and pump started to separate slightly. You could push on the motor and it would quiet down or get louder. I recrimped it together but eventually it started leaking again. If the pump is turning on/ shutting off on its own i would say that the sensor is fine. If you need a new pump motor i have one that is only a year or two old and probl only has less than 6k on it.

Bri Bro

If the noise is coming from the pump, it could be a sign of a small water leak and it will get worse.
If you replace it, don't forget to get new water hoses that connect to the pump. It is a pain to get to the back hose that connects to the Turbo, very hard to see the clamps and even harder to get a scredriver on them. Helps if it is on a lift.

Whats the story on Dr Woopie? The wellness center is in SC and your sig is from Fl.

Dr Whoopie

Thanks for the info, Are those hoses special bent from Porsche or standard hose?

Luis de Prat

Especially bent.

Bri Bro

They look like this:
http://www.944online.com/cgi-bin/ASI...ystem-944turbo
http://www.944online.com/cgi-bin/ASI...skukey_1000414

You can get the complete water hose set for a little over $100 if you look around. The pump cost way too much but what can you do.

cb951

Hi Dan,

How much do you want for the electric pump? (I assume it's the pump/motor assembly, pn#951 606 130 01.)

Luis de Prat

Actually, there's an identical unit for the Mercedes 300 series that you can find on eBay for around $60. Splice in the Porsche pigtail connector and you're in business!

Bri Bro

Is this the one?? This looks like what I would expect to pay for this little pump.
http://cgi.ebay.com/ebaymotors/Merce...em180208292298

Luis de Prat

Yep, that's it. But they're also available new for around half the price of the Porsche pump.

Be warned that some people have had leaks with theirs, but at that price it's definitely worth a shot.

xsboost90

$55 shipped.

KLR

Buy Dan's pump. If yours isn't bad yet, it'll go bad sooner rather than later. The new ones are $illy expen$ive.

cb951

Dan,

pm sent.