Hi All,

Can some tell me what is this part?

It's leaking coolang at one of the four philips screw behind the unit.
It attaches to the collant passage from the water pump and the goes into the bulk head I presume it goes into the heater valve.

Thanks in advance
Ariel

Attached Thumbnails

 

Auxiliary coolant pump. Yes, the flow is towards the heater core.

Depends on where you are located you can just remove it. I think its purpose was to increase coolant flow to the heater core faster in cold climates. I removed mine

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1990 190E 3.0L

I'm sourcing out the part it's expensive. It's probably not a good idea to delete it. I'm in Chicago and gets pretty cold. Thanks for the help.

I replaced mine on my 300D. I had lost heat when I was at a low speed.

I dont know how but, somehow I managed to buy one for $67. Everywhere I look now they are 200+!


Parts Ordered
1991 Mercedes 300D Auxiliary Water Pump Cooling System Price: $67.10 Core: $0.00 Qty: 1 Part #: W0133-1803329

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(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


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