Thread: Ultra gauge temperature reading

That does sound high, but appears to be about ball park for the 2.2

My 2010 (2.4) has never been above 92 degrees and usually moves between 86 and 90 depending on load. I have an Ultraguage I bought when Lorryman100 first posted about them.

I live in WA and my car has pulled a 6.2m boat in 40+ degree ambient with those readings...

Cheers,

Lou

We've had our 2.2 for over 18 months now (from new and stock) and those temps appears normal. Have noticed our "no load" temp seems to sit in the same range regardless of the ambient temps, summer or winter at around 92-93. Under load (climbing/towing) the summer sees a couple of degrees difference say 98-100 (summer) v 96-98 (winter). Still seems hot to me but everyone I've asked says it's normal.

I think, as Lorryman pointed out, in the Puma it is actually measuring the CHT and not the coolant temp so you'd expect it to be pretty hot in there.

I am now getting confused. My 2013 2.2 Puma seems to have a temperature sensor fitted to the radiator top hose in a tee piece which is visible on the top RHS. It is also listed in the workshop manual as a temperature sensor in the cooling section from memory and not a cylinder head temperature sensor or am I wrong on this point.
I don't recall what my 2007 Defender had although I know the cooling system arrangement of hose connections was different. Maybe 2.4 was CHT and 2.2 is water temperature. Anyone else confirm?

Originally Posted by 4wheeler

I am now getting confused. My 2013 2.2 Puma seems to have a temperature sensor fitted to the radiator top hose in a tee piece which is visible on the top RHS. It is also listed in the workshop manual as a temperature sensor in the cooling section from memory and not a cylinder head temperature sensor or am I wrong on this point.
I don't recall what my 2007 Defender had although I know the cooling system arrangement of hose connections was different. Maybe 2.4 was CHT and 2.2 is water temperature. Anyone else confirm?

Just had another look at the manuals under engine controls. The 2.2 has both CHT and water temperature sensors but I don't know which the Ultragauge reads. As others have suggested, maybe the CHT. The 2007 manual says it has a CHT which is located in top hose at the manifold junction at the cylinder head and provides engine coolant temperature but this does not seem right as the sensor is at the back of the engine in the cylinder head. I am so confused.

The ultra gauge reads the coolant temp( 2.2) - to prove- if you disconnect the sensor connector at the top rad hose the UG will read minus 40

Hi Grappler,
Yes, I went and disconnected the sensor after I posted and found the same result. Ambient was 15C and when disconnected read-40C and then warned of pending fault when car shut down. All good once reconnected and restarted. Thanks.

I actually used my UG to clear a DTC today.

Part way through runnng some wiring for my new cruise control. Introduced a fault by running the motor with the accelerator cable jumpers in place but cruise control not connected- The UG cleared the fault first go after I put the fly by wires back to normal.

I don't have a scan gauge or similar, but I have no issues at all with my puma 2.2 running at 95-98, the hotter you can get a diesel to run without overheating the better, does anyone know what temp the thermo fan cuts in at? Mine only comes on with the air con on in summer when I'm pushing the ute hard towing or up a hill. As an example my western star prime movers run between 92-105 degrees, as long as they fluctuate up to the higher levels then drop again, I know the cooling system is working at its optimum level and I won't change the way I drive them, even in summer..my 130 is no different, have some faith that plenty of extreme temperature testing has taken place on the vehicles before the motor was chosen for the application