DRBC43AMG

Has anybody removed the fan (blades) from the car? Would this increase too much the running temperature or would the electric fans in front of the radiator be sufficient to keep the water temperature reasonable on top of handling the aircon temperature?

503C43 ////AMG

I have read that the engine fan can be removed.... The electric fans SHOULD be enough as long as you dont live in an oven.

Ausmbtech

The aux fans alone can't keep the engine temp under control while stationary or at low speeds in warm-hot weather and certainly can't get it back down if the engine is already over 100C and it's hot outside without moving at at least 40kph/30mph. The main fan is on a clutch and the power transmitted through the clutch drops off around 3500rpm so the top end doesn't suffer as much as you think. Taking it off would increase raw HP but the increased temps would rob you of some of that power anyway.

DRBC43AMG

Many thanks for the clear answer Will keep definitely the fan as is. The temperature here can get rather warm 30-35° in summer not forgetting either that mountain roads can be steep. So guess I will need all the cooling potential to avoid a big and potentially expensive blow out

jumph4x

On e36 BMWs we do this all the time and I took the time to do it in my 325i. Works very well. On a big engine like the 3.6L\4.3L the throttle response and horsepower benefits would be insignificant enough to motivate anyone to do this. However, as you know the 325i is a 2.5L straight-6, and it does help. This is engineered and track proven by a racing team too, so it is bulletproof. if you are interested, check it out: http://understeer.com/fanclutchmod.shtml

HOWEVER, the biggest benefits of this are actually a tremendous noise decrease. Do you hear the 'whoosh' sound when you floor it? That's the fan and it would be completely eliminated.

Second important benefit is making the bay neater to work on, inspect front end oft he engine, do belt changes and all that.

In the e36 BMW the way we do it is very simple, and I might try this with the benz:

• Change thermostat from 88C to 80C
• Change aux fan kick-in temp sensor from a little over 90C to 88C
• [optionally] some people add water wetter, but this is debatable and I skipped that part entirely

Works like a charm. But the C36 runs a little hot for me to do this just yet. Might do it next summer if I'm feeling squirrelly.

EDIT: The more I think about it the more I want to do it. The E300's used M104 motors too right? Check this out: http://www.autopartswarehouse.com/re...placement.html A choice of 80C or 82C. And if I end up running 5C hotter in the end than I will welcome the fuel economy (and performance, right? thermal efficiency of the 4-cycle pump).

Just gotta recraft my wiring harness first and figure out where I stand with the chip.