Hi all,

Getting some really cold days here in the Carolinas. I have noticed my 2015 SCV6 is taking a lengthy time to heat up. This morning I hooked up the gap tool for my drive to work and noticed that the temp was very slow to reach 150. Probably 15 minutes. It stalls there for a while and when I hit the highway temps increased to up to 226. Same happened in my way home... temps hung around 150-160 until highway speed. I got some screenshots from the gap tool and hoping someone could take a gander to make sure it looks ok. Fan did not turn on at all, so thinking a sticky or partially stuck thermostat. Or possibly nothing is wrong and this is normal.



Before highway speed. 10 minutes after start.

After 30 minutes and highway speed

 

Correction... you guys don't know cold. ;-)
I would expect my engine inside of 4 mins to be warm... when sitting at -30, overnight.

From the workshop manual: The thermostat is a multi-stage device located in the coolant pump inlet to provide fast response and control of the engine outlet temperature.
The thermostat allows rapid engine warm-up by preventing coolant flow through the radiator and by limiting coolant flow through the cylinder block when the engine is cold. During warm-up and at engines speeds above approximately 1800 rev/min, a by-pass valve opens to control the coolant flow and pressure, to protect the engine components. When the thermostat opening reaches 6 mm (0.24 in.), the by-pass flow is shut-off. When the thermostat opening exceeds 6 mm (0.24 in.), the radiator coolant flow is further controlled up to the point where the thermostat is fully open. At this point maximum radiator coolant flow is achieved to provide maximum cooling.

And just to finish it off...The supercharger cooling system uses engine coolant to cool the pressurized charge air from the supercharger.
The supercharger cooling system consists of:
A charge air coolant pump. A charge air radiator.
Two charge air coolers. Connecting hoses and pipes.
The supercharger cooling system is operationally independent of the engine cooling system, but connected at the upper radiator hose.

The thermostat begins to open at 95 - 97 °C (203 - 207 °F) and is fully open at 109 °C (228 °F)

But I need someone to pipe in... isn't it Engine Coolant Sensor 1 at the engine and Sensor 2 at the radiator?
Where I'm going with this is it is the operating temperature of the engine that is important. The thermostat assists in regulating that temperature. It is possible that there is no need for the thermostat to be fully open as the coolant hasn't reached the trigger temperature but the engine is at standard operating temperature.

@humroot , thanks for that. It was fun.

 

Ha! Yea, my definition of cold is not the same as yours! This morning it was an arctic 28F and barely hit 50F on my drive home. Damn near got frostbite.

I was looking through the service manual right when you were posting and noticed that same section about "rapid warm-up". I think 15 minutes is way too long. Strangely, my daughters INFINITI G37 is having the same issue with a stuck open thermostat. That's what made we hook up the gap tool and check the temps.

I have an extended warranty on the LR4 (not my first Land Rover) and this should be covered. I am pretty sure my super-charger coupling is also bad. So I'll take it the local Rover shop and see if I can get both done under warranty. Gotta get what I can out of that warranty!

Thanks,
Jamie