Different Coolant for split system?
Thread Starter
Newbie
Joined: Mar 2006
Posts: 9
Likes: 9
From: Sacramento, CA
99 CLK430
Different Coolant for split system?
Hey everyone. I hope you don't mind me jumping over here, but there is a TON more info here on modding the 113k. The SL guys seem to be preoccupied dealing with our suspension gremlins and vario roof leaks. So, here's my situation and although I've searched, I haven't really found any answers... Probably because it's a stupid question, but I'm not too familiar with the cooling system.
In a few days, I'll be receiving a Eurocharged ECU tune, 76mm pulley, belt wrap kit and split cooling. I was going to get the upgraded HE also, but I was told that installing it in the SL55 is way harder than the E55. I never track this car. I just drive through the Sierra Nevada mountains and up HWY 1 for fun. I'm going to see how well the split system works and hope I don't have to go full on with cooling upgrades. I get that the hose clips will make me angry, but I'm really wondering about the coolant. Should I use something different? I've read that mostly distilled water with Water Wetter will do wonders, but I keep reading that from general "cooling" posts, mostly NA engines.
Any input would be appreciated.
In a few days, I'll be receiving a Eurocharged ECU tune, 76mm pulley, belt wrap kit and split cooling. I was going to get the upgraded HE also, but I was told that installing it in the SL55 is way harder than the E55. I never track this car. I just drive through the Sierra Nevada mountains and up HWY 1 for fun. I'm going to see how well the split system works and hope I don't have to go full on with cooling upgrades. I get that the hose clips will make me angry, but I'm really wondering about the coolant. Should I use something different? I've read that mostly distilled water with Water Wetter will do wonders, but I keep reading that from general "cooling" posts, mostly NA engines.
Any input would be appreciated.
MBWorld Fanatic!
Joined: Dec 2006
Posts: 1,308
Likes: 62
From: Bethesda, MD
2000 SL500
Hey everyone. I hope you don't mind me jumping over here, but there is a TON more info here on modding the 113k. The SL guys seem to be preoccupied dealing with our suspension gremlins and vario roof leaks. So, here's my situation and although I've searched, I haven't really found any answers... Probably because it's a stupid question, but I'm not too familiar with the cooling system.
In a few days, I'll be receiving a Eurocharged ECU tune, 76mm pulley, belt wrap kit and split cooling. I was going to get the upgraded HE also, but I was told that installing it in the SL55 is way harder than the E55. I never track this car. I just drive through the Sierra Nevada mountains and up HWY 1 for fun. I'm going to see how well the split system works and hope I don't have to go full on with cooling upgrades. I get that the hose clips will make me angry, but I'm really wondering about the coolant. Should I use something different? I've read that mostly distilled water with Water Wetter will do wonders, but I keep reading that from general "cooling" posts, mostly NA engines.
Any input would be appreciated.
In a few days, I'll be receiving a Eurocharged ECU tune, 76mm pulley, belt wrap kit and split cooling. I was going to get the upgraded HE also, but I was told that installing it in the SL55 is way harder than the E55. I never track this car. I just drive through the Sierra Nevada mountains and up HWY 1 for fun. I'm going to see how well the split system works and hope I don't have to go full on with cooling upgrades. I get that the hose clips will make me angry, but I'm really wondering about the coolant. Should I use something different? I've read that mostly distilled water with Water Wetter will do wonders, but I keep reading that from general "cooling" posts, mostly NA engines.
Any input would be appreciated.
Senior Member
Joined: Jul 2019
Posts: 268
Likes: 40
CLS55
MBWorld Fanatic!
Joined: Jul 2012
Posts: 4,509
Likes: 1,513
From: Orbiting the planet
This place is a joke.
I wouldn't bother on an SL. Make sure you have a new Bosch 010 pump and leave the rest alone. The SL has a large heat exchanger about the same surface area as the radiator, as opposed to the small one on our E55's. It's also a self-bleeding system.
Thread Starter
Newbie
Joined: Mar 2006
Posts: 9
Likes: 9
From: Sacramento, CA
99 CLK430
Thanks for the prompt input. I'll see how the temp runs for a few days and if it's stable, I'll just return the split system.
Several years ago, I found that I couldn't pull away from a Chevy Cruz on the highway during a 110 degree day. Even the driver of the Chevy looked over at me like I was pressing the wrong pedal. I replaced the bosch pump the next day.
I'm going to put together a NorCal (Sacramento area) AMG drive soon. I have to make sure I can keep up with the newer participants.
Several years ago, I found that I couldn't pull away from a Chevy Cruz on the highway during a 110 degree day. Even the driver of the Chevy looked over at me like I was pressing the wrong pedal. I replaced the bosch pump the next day.
I'm going to put together a NorCal (Sacramento area) AMG drive soon. I have to make sure I can keep up with the newer participants.
Super Member
Joined: Nov 2004
Posts: 687
Likes: 26
From: So Cal
07 GL450, 91 NSX, 12 Prius
SL55 dont need an extra heat exchanger HE ? I just ordered one.
However for sure you wont want to do split cooling. 200 degrees engine coolant will get in the mix of the Intake charge cooling circuit.
However for sure you wont want to do split cooling. 200 degrees engine coolant will get in the mix of the Intake charge cooling circuit.
