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#1
08-09-2012, 05:55 PM
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e320 water pump. level of difficulty?
what is the level of difficulty in replacing the water pump in a e320.
after replacing the coolant and thermostat, the car still overheats but only when idling.
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Ben 1987 190d 2.5Turbo 
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#3
08-09-2012, 08:03 PM
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I would say this is the most difficult dyi job I have ever done. However, I have done three of them, so it's not very intimidating, just very time consuming and a lot of back bending.
If you are not weeping or leaking it is likely the fan clutch. You absolutely have to have a thermostat in the car. It's counter intuitive...but our cars need a thermostat to keep cool. I guess you have already determined your aux fans are fine.
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1989 300ce 129k ( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone) 1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus 1994 e320 Cabriolet 108k  1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it [/SIGPIC]
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#4
08-09-2012, 09:40 PM
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i haven't even considered the fans.
what's the procedure for checking the fans? i don't think the wp is weeping.
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Ben 1987 190d 2.5Turbo
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#5
08-09-2012, 09:44 PM
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With the engine as hot as it will get shut it off and see how hard the fan is to turn. If it is easy then you need a new fan clutch. Worn ones are easy to stop with your hand while the engine is running but I would not recommend to anyone to stick there hand in there.
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Jim
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#6
08-09-2012, 10:27 PM
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Quote:
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#7
08-09-2012, 10:47 PM
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Check your radiator for cold spots , you also have seperate low speed and high speed fan control, unscew fuse box cover and look at blue and green fuses and check them out, is your coolant mixture 50%?,is your cap holding pressure?
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#8
08-10-2012, 12:19 PM
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Quote:
i've never replaced one before.
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Ben 1987 190d 2.5Turbo
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#9
08-10-2012, 03:23 PM
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There is an allen head fastener in the center of the fan that will need to be removed (conventional threads). You will need to hold the belt with an old belt wrapped around it with vise grips or there is a place in the back that you can lock it in place with a small rod bent at a certain angle at the end. I'll try to get a pic of what I use over the weekend. Replace the fan clutch first if it is easy to turn when the engine is at operating temperature.
__________________
Jim
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