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  #1  
Old 07-15-2002, 12:20 AM
GuardBott
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New User question

Hi all - I'm new to this site. Wow! Some cool stuff!

I have a question about my 1998 C280. When I start the car up, I used to hear a noticable whine, like a "turbopump" whine that would last a few seconds then go away. Now when I start up, I don't hear the whine anymore. What is this sound, and now that I don't hear it anymore should I be concerned? I've never had problems with the car before - it has run great. But I was just wondering - anyone know?

Later

Geoff
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  #2  
Old 07-15-2002, 04:55 PM
GuardBott
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Anyone? Thanks anyway.

Geoff
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  #3  
Old 07-15-2002, 05:23 PM
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I hear a similar noise in my 260E on the first startup of the day, or after sitting for a long while. It's more a lower-pitched moan than a whine, comes from the back of the engine/front of the transmission, and sounds like a flywheel spinning up.
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Old 07-15-2002, 05:31 PM
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I hear a similar noise in my 260E on the first startup of the day, or after sitting for a long while. It's more a lower-pitched moan than a whine, comes from the back of the engine/front of the transmission, and sounds like a flywheel spinning up.
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  #5  
Old 07-15-2002, 05:42 PM
GuardBott
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I was reading around on this site and I'm thinking its the air pump - which is electric, correct? It's a high-pitched whine, then it shuts downs afer the car has run about a minute or so.

Geoff
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  #6  
Old 08-19-2002, 06:04 PM
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In follow-up,

I recently changed my oil -- which I discovered was WAY low -- and my warning light did not illuminate. That whirring sound stopped, so I suspect that low oil level caused the pump's spin to be more audible (with not enough oil to dampen the sound).

GuardBott -- did you get an oil change around the time the noise disappeared?
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  #7  
Old 08-19-2002, 07:05 PM
1992300e
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Fuel pump

Electric fuel pump??

Not sure if your car has an electric fuel pump?
Joel
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  #8  
Old 08-19-2002, 07:12 PM
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Oil lamps usually illuminate OK.. did you check it when the engine had just been running? If so, chances are much oil was still around the valves etc. - they read lower on the dipstick than when the engine's cold

later
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190E's:
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
http://www.maylane.demon.co.uk/190esmall.jpghttp://www.maylane.demon.co.uk/190esmall2.jpg
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  #9  
Old 08-19-2002, 07:23 PM
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Oddly, both my oil and coolant lamps are not lighting up -- except on initial startup. Perhaps the sensors or the electrical contacts are faulty?
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  #10  
Old 08-20-2002, 12:11 PM
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I think the coolant level sensor goes through the same circuit as the windscreen wash-level sensor, so check that too.

later
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190E's:
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
http://www.maylane.demon.co.uk/190esmall.jpghttp://www.maylane.demon.co.uk/190esmall2.jpg
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  #11  
Old 08-20-2002, 12:14 PM
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Thanks Russ -- will do!
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