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#1
08-04-2003, 12:10 AM
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Overheating
 I have 89 260 E the water coolent reservoir is not working. What is getting hot is the water in the windshild reservoir does anyone know what is going on????? It even boils out....... I NEED HELP ANY WELCOME!!!!!!!!!! THANKS JEZABELL
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jezabell 
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#2
08-04-2003, 07:57 AM
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couple questions
well, can you describe what the windshield resevoir is hooked up to and what is the coolant expansion tank hooked up to and what do the caps for each of these look like? That would be a really good place to start. Take a look, are the caps metal and do they screw off or are they plastic and flip open. Second, under what circumstances does this happen? Does the car overheat when this happens? What color is the liquid boiling over, and lastly has the car been out of your hands for service lately.
cdt
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2002suzukiGSF600S 1985 190e 2.3
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#3
08-04-2003, 08:31 AM
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I understand the heated windshield washer fluid reservoir has its own thermostat, which limits the fluid temperature to 170°F. If you can find that thermostat, you should find your problem.
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95 E320 Cabriolet, 159K
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#4
08-04-2003, 12:57 PM
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Try a search for "coolant in the washer resevoir". I recall not too long back someone had the heating element in the washer resevoir go bad, dumping coolant into the res. Sounds like you might have a similar problem.
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Mike Tangas '73 280SEL 4.5 (9/72)- RIP  Only 8,173 units built from 5/71 thru 11/72 '02 CLK320 Cabriolet - wifey's mid-life crisis 2012 VW Jetta Sportwagon TDI...at least its a diesel Non illegitemae carborundum.
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#5
08-04-2003, 05:07 PM
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It sounds like the flow control valve (thermostat, if you will) for the washer resevoir has failed or is stuck open. You will have to remove the heater coil from the resevoir and test it. Simple to get out. Open main fill cover and at the bottom of the coil is a little locator shaft that fits in a recess in the resevoir bottle. Pop that out and remove the coil with the main cover. Make sure engine is cool and cooling system is not under any pressure. You can bypass the heating coil by connecting the inflow and outflow hoses together. Test the control vavle by running cool water thru the inflow side, (should pass freely). Boil up some water in a pan, dunk the valve in it and wait a minute or so. If it's OK, no fluid should pass thru the coil. If it does, you will need to replace the valve (thermostat) or the entire coil. Hope this helps.
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Jeff Lawrence 1989 300e 2000 Dodge Grand Caravan SE No matter what you fix, there will always be something else to fix.. "Warranty" is just another way of postponing the inevitable.
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