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Hello from sunny Devon and question......

xtriple

New Member
Joined
Mar 13, 2011
Messages
12
Car
R129 500
Recently bought a 129 SL500 (95) with full history (mostly MB) and in extremely good order throughout. I've since had it fully serviced and had a new clock spring fitted (as the horn didn't work - or the airbag:eek:) and generally given it a good clean/valet and general spruce up.

Anyway, the one thing it's always done since I've had it is get slightly warm when climbing hills at slowish speeds (up to say 90 - 95 degrees). I've changed the thermostat and flushed the coolant which was beautifully clean to begin with and used some of these "patent" snake oil muck dissolvers through the cooling system.

Today, had another go at flushing the system as I was concerned (and I do like to worry!) that I'd left some of the Wynns rad flush in the system and really wanted it out.

So I was blipping the throttle with the bonnet open to get some flow/get air from the rad and noticed that the fan didn't seem to get any faster or make nice "whooshing" noises as the engine sped up. So, feeling brave I stick my finger (tentatively) into the spinning blades and they just stopped!

When I let them go, they very gently went back to speed but they are really easy to stop.

Do you think this could be the problem?
 
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All of them with nary a mark to be seen! Seemed to be very little resistence to my delicate little pandies.
 
Am not an expert on these things but they are not driven like a propellor anymore direct from thje engine and hence only "come on" when really required. Often driven by some form of magnet/clutch mechanism.

Any chance the gauge is in error? If it runs at 90 on a long run then it may be OK.
 
Next time you want to gamble a finger, try a carrot first, they are a lot cheaper and it is less painful !!
 
As above, fan won't be directly driven. Pretty sure mine is electric ... i.e. comes on (full blast or nothing) triggered by a temp sensor. The other common method is a "viscous coupling" which is effectively a temperature operated clutch in the fan hub.
 
Seconded, I'm pretty sure they are electric. Certainly the 2 front push fans are.
 
Seconded, I'm pretty sure they are electric. Certainly the 2 front push fans are.

Those are for the AC not engine cooling.

My 600 runs quite hot sometimes, Olly at PCS has checked it out and there is nothing to worry about.
 
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