Coolant Temps

[RebelYankee]

Hi All,

Looking for thoughts on a coolant temp issue. 2015 SCV6 with 109k miles is taking forever to warm up. Took 20 minutes for it to reach 200 this morning in 38F weather. I originally assumed the thermostat was stuck open, but when I hooked up the gap tool I noticed the temp sensor 2 was pretty much matching ambient temps. Here is a screenshot from gap tool after 45 minutes of highway driving.

So my question is how much does the temp sensor 2 influence the thermostat?

 

[ftillier]

Couldn't you get this behavior if the thermostat was stuck partiality open? I bet it's the thermostat still.

 

[RebelYankee]

It certainly acts like it is stuck partially open. Good call. Not sure why the temp sensor 2 isn't showing anything but ambient air temp or if that influences the thermostat operation at all.

 

[Alain]

Someone correct me if I am wrong, but the thermostat is only influence by the coolant temp, nothing else.
The top radiator hose on my 2015 LR4 takes about 20 minutes to get very hot, indicating an open thermostat.

 

[Jimmy Brooks]

Believe your thermostat is closed in this photo. the second temp sensor 2 is the cooling loop going through the radiator. this would mean that your thermostat is closed so the loop is continuously cycled through the block to heat the coolant. i assume your probably running the heater in this as well so there is probably being heat dissipated through the heater core allowing the engine to stay cool enough to not open the thermostat hence the huge difference in each cooling loop.

 

[Rover Range]

Someone correct me if I am wrong, but the thermostat is only influence by the coolant temp, nothing else.
The top radiator hose on my 2015 LR4 takes about 20 minutes to get very hot, indicating an open thermostat.

Some thermostats have a heating element, which can control the thermostat.