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Old 09-11-2009, 12:53 PM   #1 (permalink)
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Unhappy 1994 E 320 water pump replacement.

can someone please help me, i need to replace my water pump on a 94 E 320 sedan, i will appreciate step by step instructions and pictures if possible. thanks
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Old 09-11-2009, 02:12 PM   #2 (permalink)
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Place to Find Coolant Pump Replacement Instructions

Go to the 124 DIY thread and look for the 124 service manual with index link.
1994 E320 has engine 104
you should be able to click through the menus to find the cooling system and coolant pump replacement instructions. (Take a whole day off for doing the job and replace the belt tensioner located just below the coolant pump, too).
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Old 09-11-2009, 04:41 PM   #3 (permalink)
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Originally Posted by olekatumpe View Post
can someone please help me, i need to replace my water pump on a 94 E 320 sedan, i will appreciate step by step instructions and pictures if possible. thanks
you better be more then do it your self to take on job like that.
i did it on my and let me tell you it was pain in the ass took me like 10hours
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Old 09-13-2009, 05:55 PM   #4 (permalink)
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Agreed. Not for the inexperienced and definitely not for someone in a hurry!
Scott in MD/DC
94 E320 Wagon
"Money can't replace it, no memory can erase it
and I know I'm never gonna find another one to compare"-LW
89 300SE (Waiting for a Hogweed rebuild in Pennsyltucky)
95 C280 (RIP)
87 190E (Sold)
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Old 09-13-2009, 10:08 PM   #5 (permalink)
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When I did it, I went to all the different Mercedes forums I know of, used the search function to search for "M103 waterpump/ 300E waterpump/ W124 waterpump" and printed the best, most clearly written ones.

I took a weekend off, during Thanksgiving weekend, and replaced with over the course of the weekend while watching college football.

If you have a modicum of mechanical knowledge it should be a decent DIY job. Fortunately, Mercedes from back then are made to be repaired. It's pretty straightforward, pretty clear. There are some hidden bolts, and you will need a series of universal joints and wobbles extensions. There is one bolt that some write ups said required a special GM tool. I bypassed that by using a quarter inch drive long extension and the requisite adapters

To whit; print the clearest, most concise directions you can find, paste em up on the wall near where you are working, make sure that you understand what they say, and take your time.

It would behoove you to replace the belt tensioner shock and the belt while you are there
'O=00=O' BMW 2002. long live the legend.

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Old 09-14-2009, 07:01 AM   #6 (permalink)
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like the others said, it's not an easy job, but if you are mechanically inclined you should be able to figure everything out. don;t forget to change the thermostat, upper/lower/bypass hoses, and also you will need 2 gallons of mb coolant or zerex g05.
what brand of water pump are you buying?
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