4ooE strange noise and over-cooling issue
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Joined: Nov 2009
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From: Los Angeles
1993 400E, 1994 E420, 2000 SL500, 2014 C250
4ooE strange noise and over-cooling issue
Well I've searched this, but didn't find the answer. My 4ooE makes a strange noise when it's cold. It sounds like a weird "chugging" or "wooshing" noise from the water pump or thermostat. Can't tell where exactly. Other people have had a similar noise, but there noises have been constant and there wasn't a definitive answer as to what was causing it. Mine goes away after the car is warm.
On top of that issue, the car is running normal at 60 degrees Celsius when it's 40-60 degrees Farenheit outside and I'm driving 85mph on the freeway for an hour and a half. Normal operating temp should be hovering around 80C and I only find it around 80C if I'm in traffic or on a warm day. Is it possible that the previous owner installed a thermostat that opens too soon? Could this have anything to do with the noise I hear when the car is cold? Here's a pic of where the temp is usually at.
On top of that issue, the car is running normal at 60 degrees Celsius when it's 40-60 degrees Farenheit outside and I'm driving 85mph on the freeway for an hour and a half. Normal operating temp should be hovering around 80C and I only find it around 80C if I'm in traffic or on a warm day. Is it possible that the previous owner installed a thermostat that opens too soon? Could this have anything to do with the noise I hear when the car is cold? Here's a pic of where the temp is usually at.
Thread Starter
Member
Joined: Nov 2009
Posts: 233
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From: Los Angeles
1993 400E, 1994 E420, 2000 SL500, 2014 C250
That's a great idea, except that I'm a student right now and can't afford to buy stuff that I might not need.
As it is, I have a leaky p/s pump and I'm pretty sure I need the flex discs for the driveshaft
As it is, I have a leaky p/s pump and I'm pretty sure I need the flex discs for the driveshaft
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1992 Mercedes-Benz 500E
Woosh might be air pump, turns off when the car is warm. I just wouldn't worry about the car running cool, 90% just needs the TS like above. Just let the PS pump leak, thats just how they act.
-Mike
-Mike
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Joined: Nov 2009
Posts: 233
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From: Los Angeles
1993 400E, 1994 E420, 2000 SL500, 2014 C250
Ok, that doesn't make me feel safe about driving at all! I'll be minding my own business and all of a sudden my airbags go off and actually cause an accident!
The signs for bad flex discs are a vibration in the mid-section of the car, correct?
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Member
Joined: Nov 2009
Posts: 233
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From: Los Angeles
1993 400E, 1994 E420, 2000 SL500, 2014 C250
As for the car running too cool, I'm worried because if the engine's not at the optimum temp, it can affect things like gas mileage and even more important, the heat sucks in this car if the temp is at or below 60 degrees Celsius and I don't have heated seats
And as far as the PS pump, I'm not worried about it. I was given a free bottle of MB PS fluid and it barely leaks anyway.
