my M3 CSL

[digi]

dame - nice work.

[alexk]

So back to the rebuild saga.
Here are the thermostat tests -> thread

Now here is the picture of my radiator.
A lot of dirt. No wonder the cooling system was not performing good.



More updates to follow in the next days.

[alexk]

A busy weekend but managed to do a lot of things.

Here is the old vs new water pump.
The new pump is slightly different inside, where the bushing is. Also the geometry is slightly different inside. Maybe the flow will be be better (?).



Here the water pump installed, with new pulleys and belts.
Also new thermostat and water hoses. Just being proactive with the water hoses.



The oil radiator was more dirty than the water radiator.



Here both radiators after cleaning them.



Here is the front mask in an AC equipped CSL.
It is visible that it is blocking a lot of air.



There are also these silly ducts (like in the efficient dynamics newer models that close when not going fast or stopped).



Just check here how much surface the fan base and fan itself are blocking.



I binned the fan and here is the end result (like in the non-AC CSLs).
The fan is 4.5kg so another weight saving.
The problem will be if you want to use the AC when stopped in traffic, but I don't mind as I never do this.



Also, I binned the fan and the fan shroud (more weight savings).
Another 1.8kg saved here.



Then I put the car back together and started it.
It will be interesting to see what happens next time I have a trackday and it is hot.

[shimmy]

Alex.........superb, you are a brave man,.

[alexk]

I have many updates on the temperature issue topic.

I will come back to you in a week or so.
Need to sort the bloody front top mounts etc.

[shimmy]

Originally Posted by alexk

I have many updates on the temperature issue topic.

I will come back to you in a week or so.
Need to sort the bloody front top mounts etc.

Very interested to hear this.

I've recently swapped out my rad to a new OeM rad and also put in a new viscous fan clutch thingy.

[Graham]

Very interested to hear the outcome.

Does your a/c still work?

Visibly it looks like it will make a big difference to running cooler.

[shimmy]

Originally Posted by Graham

Very interested to hear the outcome.

Does your a/c still work?

Visibly it looks like it will make a big difference to running cooler.

Or hotter

[Marv968]

Originally Posted by alexk

There are also these silly ducts (like in the efficient dynamics newer models that close when not going fast or stopped)

Interesting.

How do these flaps work then? Are they attached to a servo?

[Graham]

Originally Posted by shimmy

Or hotter

I meant when driving along you'll get a lot more airflow to the front of the road

But it is the sitting in traffic bit that worries me