Electric fan install - PeachParts Mercedes-Benz Forum

tjts1 · #1 11-24-2016, 11:35 AM

Quote:

Originally Posted by lsmalley

So what's the difference between my set up and the stock fan set up which uses the same sensor to control the fan? Also, this is where I got the resistor information from: K6JRF Auto Page so not sure why it wouldn't work.

He's right, your relay is not going to work with a sensor, you need an ON/OFF switch. The resistor mod works because the stock fan setup is controlled by the tempmatic unit which is a lot more than just a relay. Heres how I did it on my old 2.6.

Here's how to properly setup a fan relay if you're doing it from scratch. The light and manual switch are optional.

lsmalley · #2 11-24-2016, 11:42 AM

Quote:

Originally Posted by tjts1

He's right, your relay is not going to work with a sensor, you need an ON/OFF switch. The resistor mod works because the stock fan setup is controlled by the tempmatic unit which is a lot more than just a relay. Heres how I did it on my old 2.6.

Here's how to properly setup a fan relay if you're doing it from scratch. The light and manual switch are optional.

Does this set up utilize the aux fans or did you take out your viscous fan and add an electric one?

tjts1 · #3 11-24-2016, 11:44 AM

Quote:

Originally Posted by lsmalley

Does this set up utilize the aux fans or did you take out your viscous fan and add an electric one?

I used the stock aux fans and removed the viscous fan. The aux fans on their own provide more than enough cooling for this engine. I was triggering them on high speed with the resistor bypass.

lsmalley · #4 11-24-2016, 11:48 AM

Quote:

Originally Posted by tjts1

I used the stock aux fans and ditched the viscous fan. The aux fans on their own provide more than enough cooling for this engine.

That depends on your climate. Ususally the problem is when its summer and the a/c is on which increases engine temp. At 120F ambient temp with the ac on and both fans on high, if I'm sitting at idle or creeping along slow the temps will rise rapidly. And this is with a new radiator, water pump and running about 80/20 coolant

tjts1 · #5 11-24-2016, 01:32 PM

Quote:

Originally Posted by lsmalley

That depends on your climate. Ususally the problem is when its summer and the a/c is on which increases engine temp. At 120F ambient temp with the ac on and both fans on high, if I'm sitting at idle or creeping along slow the temps will rise rapidly. And this is with a new radiator, water pump and running about 80/20 coolant

What temperature are you triggering high speed?