[DR-JEKL]

Did you notice a tangible difference with lowering of oil temps also with the CSf rad fitted? Cloud9blue

[jacie6056]

Winter is coming, I know how to adjust the coolant circle through MHD to make it cooling faster. However, How can I make it slow down the cooling circle through MHD in order not to over cool the engine when outside temp below 32F. Since the CSF radiator is too efficiency for winter use. MHD Tuning
Thanks,

[jetdriven]

I have found a solution after a lot of work. The CSF radiator is very efficient. The lower 4” of this radiator is a low temperature circuit to cool the transmission. Water passes from the left tank through a slot inside the left corner pfnrhe radiator inside the drain, along he bottom 4” of radiator, To the right side. There is a 5/8” hose on the extreme right hand bottom corner of the radiator which takes water from this circuit and sends it directly to water inlet pipe on the N54. Amazingly it is enough to keep coolant temps at 80c or even less at ambient temperatures of 50f and below. Mine at 65 MPh on a 30 degree night the highest coolant temp observed was 70C. Far too low. Fuel mileage is bad, and the heater doesn’t work.
Here’s the solution. Buy a hose pincher from amazon and put it on the low temperature circuit hose between the radiator and the water pipe. Squeeze the hose down to 1/2 or less of it’s original diameter. Monitor coolant temp in the Kombi under section 7.0. Shoot for 90-100c on The highway. Remove the hose pincher in the summer. You could also install a shutoff valve with hose barbs too.

[Cloud9blue]

Originally Posted by jetdriven

I have found a solution after a lot of work. The CSF radiator is very efficient. The lower 4” of this radiator is a low temperature circuit to cool the transmission. Water passes from the left tank through a slot inside the left corner pfnrhe radiator inside the drain, along he bottom 4” of radiator, To the right side. There is a 5/8” hose on the extreme right hand bottom corner of the radiator which takes water from this circuit and sends it directly to water inlet pipe on the N54. Amazingly it is enough to keep coolant temps at 80c or even less at ambient temperatures of 50f and below. Mine at 65 MPh on a 30 degree night the highest coolant temp observed was 70C. Far too low. Fuel mileage is bad, and the heater doesn’t work.
Here’s the solution. Buy a hose pincher from amazon and put it on the low temperature circuit hose between the radiator and the water pipe. Squeeze the hose down to 1/2 or less of it’s original diameter. Monitor coolant temp in the Kombi under section 7.0. Shoot for 90-100c on The highway. Remove the hose pincher in the summer. You could also install a shutoff valve with hose barbs too.

so much trouble and I am not sure pinch the rubber hose like that especially during cold weather is a good idea.

I just tape my grilles with masking tape during the winter. Looks funny but who cares...

[jetdriven]

The hose is supple and it springs back. Put a shutoff valve in it if you wish but you need to restrict water flow though that hose. Running at 160f isn’t good for the car either.

[jacie6056]

Originally Posted by jetdriven

The hose is supple and it springs back. Put a shutoff valve in it if you wish but you need to restrict water flow though that hose. Running at 160f isn’t good for the car either.

You are so smart. I like the DIY solution. Would you be able to take a photo about the hose you mentioned and also the amazon link you bought?

[seccsc]

Here is my car the other day. I'm not sure why my car is doing okay maintaining temperature with the CSF radiator.

[Cloud9blue]

Originally Posted by seccsc

Here is my car the other day. I'm not sure why my car is doing okay maintaining temperature with the CSF radiator.

low speed = low airflow = less cooling

try get the heater blowing hot air on the highway in single digit weather w/o taping up the grilles

[seccsc]

Originally Posted by Cloud9blue

low speed = low airflow = less cooling

try get the heater blowing hot air on the highway in single digit weather w/o taping up the grilles

This was after running between 60-70 MPH and car cooled down a little after getting off the interstate.
I do have hot air but it takes about 10 minutes of driving before the air is warm enough.
It is on a very rare occasion I get single digit weather here where I live.

[Cloud9blue]

Originally Posted by seccsc

This was after running between 60-70 MPH and car cooled down a little after getting off the interstate.
I do have hot air but it takes about 10 minutes of driving before the air is warm enough.
It is on a very rare occasion I get single digit weather here where I live.

In my car, my engine coolant and oil temp goes up once I am off the highway.

[seccsc]

Originally Posted by Cloud9blue

In my car, my engine coolant and oil temp goes up once I am off the highway.

That's interesting. You are still running a very low oil temperature, correct?
Is your AC button on?
I get a thermostat error when the AC button is not selected.

[techwhiz]

My car take longer to warm up with the CSF radiator.
I will occasionally get an error about the thermostat in really cold weather if get stuck low speed driving and it doesn't warm up fast enough.

[Jeff@TopGearSolutions]

Originally Posted by seccsc

Here is my car the other day. I'm not sure why my car is doing okay maintaining temperature with the CSF radiator.

You're aware that's the oil temp gauge and not the water temperature, right?

[seccsc]

Originally Posted by Jeff@TopGearSolutions

You're aware that's the oil temp gauge and not the water temperature, right?

Concur. Why do you ask?

[feuer]

Originally Posted by seccsc

Here is my car the other day. I'm not sure why my car is doing okay maintaining temperature with the CSF radiator.

That is not really maintaining temperature. Is lower than it should be. Here is mine for reference with OEM radiator at bellow -21c which is bellow -6f. Oil temp is at 90c or 195f. That is about same as yours. Imagine what would happen if you are driving at bellow-6f. Your ambient temp shows +15f

[seccsc]

Originally Posted by feuer

That is not really maintaining temperature. Is lower than it should be. Here is mine for reference with OEM radiator at bellow -21c which is bellow -6f. Oil temp is at 90c or 195f. That is about same as yours. Imagine what would happen if you are driving at bellow-6f. Your ambient temp shows +15f

Oh I agree. If I lived in a colder area, this car would not be able to maintain a semi proper oil temperature.

[feuer]

Originally Posted by seccsc

Oh I agree. If I lived in a colder area, this car would not be able to maintain a semi proper oil temperature.

CSF radiators are very efficient. Cloud9blue had to tape over the grills in order to be able to drive in subzero ambient temperatures in IL.

[feuer]

Here is another photo showing my 335i at 100c oil temp with ambient -10c. Oem radiator with PPK add on coolant radiator. http://www.e90post.com/forums/showpo...postcount=1179

[lhuynh336]

has anyone else ran this radiator on AT cars with no tune? getting a vault for the Thermostat being jammed opened and an indy shop/bmw dealer is telling me its the CSF radiator just flowing too good.

[Shoulder Devil]

So does any one have an answer about what inlets are compatible with the CSF? I thought someone said the silicone MMP are too fat and rub pulleys. Only answer I see is HEXON but they are out of business? If i'm going to put a CSF on would be nice to do inlets while i'm at it as I will have more room with fan and radiator out...

[335is_G]

Is anyone using the csf in the Los Angeles area? My radiator seems to have a leak on the driver bottom corner. Which is now causing my car to over heat. Due to it leaking out the coolant. Wanted to see how good it worked out here since this summer gets hot af specially while in traffic

[Jeffman]

Originally Posted by Jeff@TopGearSolutions

Although ever so slightly thicker, I don't think it will be a problem. With most inlet installs the issue is keeping the inlets away from the engine side of things.

Update for internet posterity: I finally am now installing the CSF radiator as my stock one leaked at 76k miles. I had installed the RB Tuning Stock Side silicone inlets last year. The increased thickness of the CSF radiator, about 10mm, is large enough to push the inlets into a belt pulley.

I’m evaluating my options.