Hi, First, I love the forum and all the valuable information I been able to use, I bought my 07 XKR back in April and have been busy working and maintaining as most of you do, my last repair of changing the belts and water pump went smooth, but while digging into the cooling system I found that my intercooler water pump may not be working, My IAT runs around 130F, I have not received any DTCs or went into limp mode, but it should not run that hot. I vacuum filled the cooling system allowing the system to maintain a vacuum for a full hour to ensure that I didn't have any air trapped in the system, but the temps didn't drop, so long story short, I don't have any voltage at F24 for the cooling pump, so I want to check voltage at the relay shown as R12B but I can't find it, any help would be great along with any other trouble shooting suggestions.

 

Our intercooler pumps only work with the engine on and will not work with ignition on. 130 sounds about normal for stock setup.

 

When the pump packed up on my X100 she went into limp home mode so check your codes with an OBD2 reader.

 

Hi, Thanks for the reply, I'll check the voltage with the engine running, how much did your IAT drop with the Bosch pump?

 

Its hard to say, my estimate is that temperatures stay a little lower maybe 10 degrees , but drop quicker than stock with some air movement over intercooler. Keep in mind I also have lower temp thermostat and coolant fan reprogrammed to keep overall lower temps under the hood..