How Do I Move Washer Reservoir to Access Aux Water Pump? - PeachParts Mercedes-Benz Forum

shertex · #1 10-28-2010, 07:51 AM

Need to replace aux water pump on 1991 300D....can see it sitting beneath washer reservoir. While I don't know that I need to remove entirely the washer reservoir, I at least need to move it out of the way.

Can someone walk me through the steps? I imagine it's pretty basic, but I thought I'd check with those who've done it before. Looked for it in the FSM, but couldn't find it.

Thank you.

vstech · #2 10-28-2010, 08:41 AM

you unplug the power to the pumps, or just pop the pumps out of the reservoir, then just lift it up.
if you have heated lines in the lid, you need to move them out of the way first.

dablk1 · #3 10-28-2010, 08:49 AM

Remove two top hoses on the reservoir, disconnect or pop out the pumps at the base of the reservoir and the reservoir will slide straight up. Remember that it's probably been sitting there for 18 years. Give it a nice firm pull.

shertex · #4 10-28-2010, 08:57 AM

Do I need to clamp the top two hoses, the ones that feed coolant through the reservoir? Or will I just need to concern myself with clamping the hoses to the AWP?

Don't own any clamps...will get some today.

dablk1 · #5 10-28-2010, 09:14 AM

Just the 2 hoses to the AWP. If you unplug the power to the windshield washer pump/s you will not lose anything If you just simply pop the pumps out all your going to lose is windshield water fluid through the hole/s that the pumps were in.

shertex · #6 10-28-2010, 09:32 AM

Quote:

Originally Posted by dablk1

Remove two top hoses on the reservoir, disconnect or pop out the pumps at the base of the reservoir and the reservoir will slide straight up. Remember that it's probably been sitting there for 18 years. Give it a nice firm pull.

Thanks....that was easy enough.

That AWP is pretty tight down in there....debating whether to do it myself or have my indie do it. Can't imagine he'd charge me more than 1/2 hour.

dablk1 · #7 10-28-2010, 09:48 AM

You could do it yourself in 15 mins without the clamps. From the way it sounds you've already removed the reservoir. The AWP is righ there. You can disconnect the power and the hoses. Slide it out of the rubber, slide the new one in and reconnect everything.

shertex · #8 10-28-2010, 09:56 AM

Quote:

Originally Posted by dablk1

You could do it yourself in 15 mins without the clamps. From the way it sounds you've already removed the reservoir. The AWP is righ there. You can disconnect the power and the hoses. Slide it out of the rubber, slide the new one in and reconnect everything.

So I don't need to clamp the coolant lines? In which case, what, just a little bit dribbles out and that's all?

So the rubber holder stays connected and intact?

dablk1 · #9 10-28-2010, 10:11 AM

You don't have to clamp the coolant lines, but you will have a little coolant loss if you don't. Don't disconnect them and take a coffee break. You can actually do one at a time. Depending on the conditions of you hoses(rubber is flexible) . Disconnect one at a time and attach to new one. Slide out the old one and slide the new one into the rubber holder. If you really don't have th confidence to do it, then let your indie do it.

shertex · #10 10-28-2010, 10:34 AM

Quote:

Originally Posted by dablk1

You don't have to clamp the coolant lines, but you will have a little coolant loss if you don't. Don't disconnect them and take a coffee break. You can actually do one at a time. Depending on the conditions of you hoses(rubber is flexible) . Disconnect one at a time and attach to new one. Slide out the old one and slide the new one into the rubber holder. If you really don't have th confidence to do it, then let your indie do it.

I'll probably give it a shot....my main concern when I looked at it was how tight it was down there.

FrodeS · #11 10-30-2010, 08:08 AM

Replaced the pump on mine without removing the tank.

If you remove the tank, you'll probably spill more collant when removing the pump. Do it quickly and refill with a little coolant when done.

Or, flush the system with water and replace all coolant. It is supposed to be done every 2. years.

shertex · #12 10-30-2010, 12:56 PM

Quote:

Originally Posted by FrodeS

Replaced the pump on mine without removing the tank.

If you remove the tank, you'll probably spill more collant when removing the pump. Do it quickly and refill with a little coolant when done.

Or, flush the system with water and replace all coolant. It is supposed to be done every 2. years.

That's impressive...it's hard to imagine you would have room to maneuver your hands and deal the the hose connections with the tank in the way.