Originally Posted by duxthe1

I have a new Behr fan clutch and radiator. At low RPMs the fan clutch doesn't pull enough air to hold 87 degrees. It will heat up to 105 if left sitting for any legnth of time. When driving off I get a good howl as the engine revs and it pulls the temp down in a hurry. When I run my a/c the aux fans are almost always on in hot weather and supply enough air at idle to hold temps much better. So if I'm left idling any legnth of time I just switch on the a/c and all is good.

Originally Posted by Ferdman

whatever, recommend buying a reconditioned water pump from a MB dealer. It will be less expensive than a new one and have a 1 year guarantee.

Originally Posted by oldsinner111

When I insall a E Fan,I use stock fan shroud to mount e fan inside.

Originally Posted by S124300

The viscous fan ought to be silent in ordinary running and should only roar like an aeroplane engine when it is engaged to cool the hot engine.
Viscous clutches fail, usually, in one of two ways: Either the clutch seizes up and the fan spins at full power all of the time or the clutch becomes slack and doesn't spin the fan quickly enough at idle.
M103 engines had two different types in production: bi-metallic, heat, triggered and magnetic clutch triggered. The latter is obvious by the black electric cable running to the rear area of the fan clutch.

Originally Posted by whatever

Yup, same stuff, mostly.


that's a great advice, thank you! I wonder if they offer some of them here.


Do you mean that you've got a E320 electric fan and etc? from W210?


Are they interchangeable? I wonder if the magnetic clutch would need an extra wire or something...

P.S.
Might it be a too low idle? I've got 650-700 rpm idle, and 550-600 rpm with D engaged. 1.5 kg/cm3 oil pressure at idle, btw.