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  #1  
Old 09-13-2001, 09:46 AM
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Join Date: Jan 2000
Location: St. Paul, Minnesota, USA
Posts: 58
windy roaring noise from under the bonnet

I posted this in the Tech Talk section...but hope a fellow SL owner may have some insight, too.

Have an '87 560SL.

From time to time, there comes (seemingly) from under the engine compartment a windy, almost hollow-sounding roar...as if a strong fan were kicking in...the noise almost always abates when I ease up on the gas, but I can't correlate its changes with engine vacuum or RPM.

Does this engine have an electric fan that kicks in?

It's my first Mercedes, and I have no points of reference.

Any thoughts would be appreciated, as always.

~Tom

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'87 560 SL
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Old 09-13-2001, 02:04 PM
sbr
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roaring noise

My '79 450SL does the same thing. Sometimes it's more noticeable than others. Like with the top down. I've been told it's the fan. Mine has a clutch fan. Don't know if yours is the same, but I would think so. It does get irratating at times, but I don't think there's anything that can be done.

sbr
'79 450SL 75,000 mi
milanbraun/palomino
lake st.croix beach, mn.
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Old 09-16-2001, 06:21 PM
Southern_Son
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It is the fan clutch. My little 380 sounds like a turbine jet preparing for a shortfield takeoff! (now if I can just find out why those brakes remain locked...........)
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Old 09-17-2001, 08:25 AM
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Join Date: Jan 2000
Location: St. Paul, Minnesota, USA
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thanks

I was guessing it would be something like that...but having no experience, I wanted to verify.

What a great forum this is...what a great country this is.....

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'87 560 SL
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