New fan clutch and overheating [M103] - PeachParts Mercedes-Benz Forum

stormyc88 · #1 07-24-2011, 02:31 PM

Hello! Did you replace the thermostat as well? It's typically done along with a new water pump and rad. I believe the Behr 87 degree celsius is the most recommended one. And as far as the water pump goes, oem is basically the only recommended pump for the car, so you might just want to scrap the airtex and get a m-b.

-Chris

whatever · #2 07-24-2011, 08:21 PM

Quote:

Originally Posted by oldsinner111

I'm going with a electric fan on my m104 w140.

Is it attached to the radiator w/ a some kind of a housing?

Quote:

Originally Posted by stormyc88

Hello! Did you replace the thermostat as well? It's typically done along with a new water pump and rad. I believe the Behr 87 degree celsius is the most recommended one. And as far as the water pump goes, oem is basically the only recommended pump for the car, so you might just want to scrap the airtex and get a m-b.

-Chris

Yup, I'm pretty sure, I've got a new thermostat installed. My MB specialist said it can be trusted. In city driving at medium speeds the temp rarely goes up more than 87 degrees.

Pump? thermostat again?

Any ideas about the fan? Should I change the fan?
I'm seriously sick of its sound. I'm not likely to drive it because of the whine. My M103 sounds ideal, serviced CIS-E, new exhaust, cats and etc. it's quite and stable and the fan is like 100 times louder than the exhaust sound. I hear only the fan with the windows closed.

My friend with some MB collection (W140 S320, R129 SL320 final edition, G55 '07, C32 '03) says that I should change the fan clutch to MB original and it all would be good.

I don't have audio system now, coz someone had decided to steal, breaking a passenger window, an old pioneer car audio system which was installed there. Btw, on the 1st night after I've bought it, haha.

And also I'm listening to the engine and stuff that might appear, as I've changed the engine (as it died on the 10th day that I bought it).

Plus last year I used to drive a Nissan Silvia S13 (JDM RHD coupe) and it had a viscous fan clutch but it was DEAD SILENT. Though I liked to rev it hard, it was N/A and AT so it wasn't too fast from stand still. Now it's 2JZ-GTE w/ 5-speed, but still WIP.

My pitch black girl...

Sorry for off-topic.

P.S. This night I visited local MB dealer (24h service and parts, btw) and they said it was $400 for the pump and $250 for fan clutch. Dammit.

stormyc88 · #3 07-24-2011, 08:49 PM

If the fan is engaged even when you're at highway speed and the coolant temp is below 100C, that's not right. Mine disengages as soon as the temp drops, 10 seconds after the fan comes on, tops. Go with the OEM clutch. I prefer to go with oem everything. To me, if mercedes considers it good enough, thats all I need to know

. Also, when you're sitting in traffic, it's not uncommon for the m103's to get toasty. Mine does, especially with the a/c on. The electric fan is supposed to come on when the temp reaches 105C. Just so long as it cools right off when you start moving again, you should be ok. When you take the the clutch off, inspect it. If there's something wrong with it, you may be able to get your money back. $400 for the pump at the dealer ain't too bad, especially if you're gonna do it yourself. I would be a little leery of having to make spacers and stuff in a M-B water pump. But, do the fan clutch first, before you spend the money on the pump.