speedybenz

It appears that the fan located on the water pump shaft is redundant considering that there are two electric fans already installed to cool the fluid in the radiator.

What are some opinions on this and has anyone remove it?

Vadim, Ben?

Thanks,

Jeff

230KBenz

Yea, your going to want to keep that fan there. The two fans in front only come on when the car is not moving and warmed up or if the A/C is on and it needs to bring down condencer temp. I agree that the new models with one big electric fan behind the radiator is a better idea but they just diddnt think so back then or something.

2003 C230K magma C5, C7, 6 spd.

speedybenz

The two electric fans do not come on when the fluid temp comes up to some predeterimined level?

Jeff

230KBenz

They will if the temp gets too high, but with only them it wont be enough to cool down the engine. Its up to you if you really want to try, its just that they put that fan there for a reason. also fans in front acting as a "pusher" will not be as effective as a "puller" which is in the rear.

2003 C230K magma C5, C7, 6 spd.

Vadim @ evosport

You are correct. It is redundant. We have removed a number of them not only on MB, but also on E36 3-series.

Unless you live in a very hot climate - 95F plus most of the time and drive in constant traffic.

speedybenz

Vadim,

Thanks for the input. The fan comes off this weekend.

Jeff

Mach430

Jeff,

Our underdrive pulleys will work on your C43, with the same 13hp gains as other cars.

Thanks,
Ben

speedybenz

Ben,

Thanks for the info. I am going to machine a set of phenolic heat spacers to go between my intake manifold and cylinder and when I get that going I will get those pulleys.

Thanks,

Jeff

Mach430

A customer just dyno'd his car after installing our pulleys and removing the mechanical fan. He told me he had a little over 14hp at the wheels in 3rd gear, and that his CLK430 chirped its tires for the first time.

Turbo][

So you guys are saying pulling off the pulley fan without even attempting to add a puller electrical fan is okay?

What about in the S/C application?

Mach430

For most applications and locations it is ok. Of course, if you are concerned, then don't.

Special applications should check with the manufacturer of the system first.

Lucas

All S/C Kleemann CLK V8 runs without the mechanical fan, I have nowhere in the world despite clima heard of any over heating.

I experienced my self at a racing event where we lent out a CLK 55 K to race driver Jason Watt, that the car drove on a very short low speed track with only overheating 1 time over a whole weekend with endless drives and over 30 2-300 meter burnouts and donuts, 1 lap at normal speed took care of that.

On dyno a S/C E 280 V6 have 265 HP with the fan and 285 without. Just make sure the electrical fans are working corect before you remove it ( remember it a links, when dismounting )

speedybenz

Having removed the mechanical fan some while ago I though I would report my results.

One the car runs at the same temp without the fan as it did with the fan. So no change there.

Two the radiator hose that runs from the thermostat housing to the drivers side of the radiator began to rub on one of the pulleys to the piont of developing a leak.

So if your remove the fan make sure the radiator hose is secured so it can't rub one of the pulleys.

Jeff

Lucas

Did you remove the fan cover as well ?????

How can only removing the fan from the engine make a hose rub ???

speedybenz

Yes the fan cover was removed also. So even though the hose sits off the pulley 1"(25mm) or so I think at high speed the airflow through the radiator pushes the hose back into the engine.

Looking at the hose location with the car static you would not think that it could be forced back into the pulley by airflow through the radiator.

Jeff

dtkw

Really? There is a BIG fan infront my 86' 560SEL radiator and comes on when things get hotter than normal. And that's 17 years ago.

Lucas

You should only remove the fan and let the cover stay.

I have no experience with the 560, but it's working the same way, there is only one way to find out, and that is to dismount and see if the electrical fans can take it or not, I think it won't be a problem - the gain is aprox. 15 HP.

benzmac

The newer cars (1998 and up) use computer logic to turn on the auxillary fans at specific coolant temps using the climate control system.

The 560 had no such provision. Do not remove it from this car.

On the others, I have had no problem with removing the fan...(yet).

We have removed 12 or so in the last year and a half.

Turbo][

I also have removed my fan. I have been driving around without it for the pass 2-3 months. Temp is the same, driving on the fwy, it sits on 83C, and than at dead stop traffic with A/C on, it's near 90C.

however I haven't really felt any difference either.