Quote:
Originally Posted by sixto
How do you drain the overflow tank? Isn't it easier to connect a hose to the radiator drain and collect coolant into a clean container? As you said, you only have to get coolant below the level of the aux pump. You can see the level in the reservoir.
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I plan to just pull the hose off the bottom of the reservoir after I've removed it from the bracket, there's plenty of room to collect coolant from the hose attachment there I think. Alternatively I could drain off the radiator directly although I'm not sure how much that will pull down the reservoir.
Quote:
Originally Posted by sixto
Where is the aux pump in a W140? I don't remember seeing it in my 93. I think cars with separate rear ACC have yet another pump in the right fender cavity.
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The coolant circulation pump is under the driver side removable plastic cover, right next to where the AC low pressure attachment is. My car doesn't have rear heat / AC so I can't comment on that but the circ pump and solenoids are located there.
I'm not going to do this right now because I may couple the pump replacement with a full cooling system flush since I don't know when the coolant was last done and it could need it.
Steve A