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Old 01-12-2011, 02:02 PM   #41 (permalink)
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Date registered: Feb 2009
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Can I assume the same procedures for a 2004 E320 4-matic wagon? Looks to be the same although my car has electric fans and no fan attached to the water pump pulley...which is wobbling like crazy and making a squawking noise. Also, about how long to replace. Its minus 30 here and I don't have room in my garage to do the repair. Thanks!
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2004 E320 4-Matic Wagon
2003 VW Passat 4-Motion Wagon
1986 Intermeccanica Roadster RS
1983 300SD
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Old 01-12-2011, 02:40 PM   #42 (permalink)
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Vehicle: 2001 E430 4matic
Location: Charleston, SC
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Hey Brian,
Should be the same man. For my E430 I had to remove the fan, serpentine belt and I could easily reach the water pump. The serp belt runs all that stuff up there, and was fairly easy to remove. The hardest thing for me was finding the tools to remove the fan. Rented some tools from Autozone that didn't work, ended up just improvising with some vise grips. Took me several hours, but with a steep learning curve. As to the cold, hmmm can't help there. Good luck man!
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Old 01-12-2011, 03:45 PM   #43 (permalink)
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Thanks, with my car having an electric fan I don't think I will need those special tools. There's a good 4 or 5 inches between the front of the engine and the electric fan so should be adequate to remove the pump. Should anything else be replaced while doing this? Serpentine belt probably, they have a short lifespan in our cold, what else though? Car has about 110,000 kms or 70,000 miles.
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Old 01-12-2011, 04:00 PM   #44 (permalink)
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You'll want something to lock the shaft while you remove the pulley bolts. Perhaps you can break them free before removing the belt and torque them to spec after the belt is back on.
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Old 01-12-2011, 04:04 PM   #45 (permalink)
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I've used one of those strap wrenches to hold pulleys similar to that one on the pump...it should work and is cheap. What about buying the part...any suggestions? I've dealt with Genuine Mercedes Parts before and they were always more than reasonable but for some reason they want $404 for the pump while many other places want less than half of that.
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Old 01-12-2011, 04:13 PM   #46 (permalink)
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Sorry, I can't really help you with the pump. It's so different from what I have, that I've not looked into it.

I've dealt with a few of the online vendors, and have only been dissatisfied with purchases from Ebay. But Ebay is what it is.
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Old 01-12-2011, 04:20 PM   #47 (permalink)
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Vehicle: 2001 E430 4matic
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Hey Brian, have you changed the transmission fluid and filter? A good idea at that mileage. I am coming up on 150,000 miles and it is time for me to do it again. Would love to be able to get into that 4matic transfer case too change that fluid too, not sure how though.
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Old 04-12-2011, 12:07 PM   #48 (permalink)
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Date registered: May 2008
Vehicle: 2005 ML500 Special Edition, 2006 CLK500
Location: Scottsdale, AZ
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I am looking to replace my water pump now after a bad fan clutch put too much stress on it.

How do I know if I need the 2 or 3 outlet?

Also, how long does this take on average? Do you need to remove the radiator?
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Old 04-12-2011, 02:03 PM   #49 (permalink)
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Took me about 2 hours in the driveway when it warmed up to minus 10. I have an electric fan so there was less work than with a mechanical fan. No removal of the rad required. You do need the "star" sockets which I got at a local store here. I used a strap wrench to hold the pulley while I removed the bolts. Looking at the front of the pump you'll see the two main hoses coming out of the left, passenger, side of the pump. The third hose is smaller and comes out of the top of the pump, to the right of center. If you take a look at some of the pictures of replacement pumps on seller's website you can see the littlehose connection.
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Old 04-13-2011, 11:17 AM   #50 (permalink)
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I am working on a 1998 e300 and would like to have the torque specs for the thermostat housing that bolts to the block. Thanks for any help.
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