CL600CK60V12

I've read the long threads on cooling pumps and heat exchangers and have one remaining question.

Is it possible to keep the engine temp at "80" (or as close to "80" as possible, under normal driving conditions) with an existing heat exchanger and some better-flowing pump? If so, which cooling pump provides the best (faster) coolant flow with W215's standard heat exchanger?

Thank you.

S.

tusabes

It's. Not supposed to be at 80c.

Most thermostats are 93-95c these days

It seems you are also talking about heat exchangers for the inter cooled turbo - which is not the same as coolant temp for the engine which is what the dash gauge measures

CL600CK60V12

Yes. I read once again posts on the excellent thread about HEs and ICs and I understand that IC, HE and pump would have to be upgraded for improved cooling.

ItalianJoe1

To get your engine temps down you will need to go to a lower temp thermostat, most OEM units are rated at 95 C now so that's about where the car sits. If you put an 80C t-stat in the car it will open sooner and keep the engine temps down, you may need to turn the fans on earlier though as they aren't programmed to cool the car below 95C.

Also if the car doesn't warm up fully you can have issues with the ECU not going into closed loop, setting fault codes. On many platforms you can delete this with tuning for performance use but there's not a lot out there on this car.

None of this has anything to do with your intercooler temps though, totally different system. Need to monitor that temp on it's own, there's no gauge for it stock.

CL600CK60V12

@ItalianJoe: thank you for clarifying this. The question is then which IC pump can cool the air better than the stock one.

ItalianJoe1

Well, the pump only moves fluid. The heat exchanged up front in the grille area cools the fluid, the intercoolers on the engine cool the charge air going into the engine.

If you are increasing system capacity or adding more restrictions, you may need more pump capacity. If the rest of the system is stock, simply swapping to a bigger pump isn't going to help you.

There's a great sticky thread in the M275 section about cooling these engines, I believe it will answer a lot of the fundamental questions you will have.
https://mbworld.org/forums/m275-v12-...ion-pumps.html

If you are going to upgrade the coolers/exhangers, then you can take advantage of the greater pump capacity to move the extra coolant. Until then, get the newer MB pump (ends in 010 part #) and for better response you can wire it to run whenever the engine is on, which will help fight the heat soak inherent in a top mounted intercooler core system such as ours.