Engine Running Temperature

[VZ05]

Hi, I have a VZ 2005 Executive wagon on Factory Gas, I'm about to change the coolant and possibly the thermostat and I'm unsure whether the thermostat is operating correctly.

The engine temp currently runs between the 1/4 and about 0.5 of a centermeter above the quarter mark (1/4 mark when coasting or low loads, and just above, 5mm, when underload and hot weather), I'm interested to see the operating temperatures of other crew with VZ's to see their operating range and whether this is right?

 

[2cool]

Mine gets almost to the 3rd stroke and the fans come on, has never been past that. I dont know what temp that is though.

 

[CMA]

When driving mine stays on the second bar and when idling for a while it will float between the second and third bars, as 2cool said just below the third bar the fans engage

 

[IPCOlsenVZ]

From the VZ factory manual:


All Alloytec’s with a standard cooling system.

Stage 1 fan operation

ECM switch cooling fan on when:

• Air con is on and indicates 'Yes' to the ECM during speeds less than 30km/h

• Air con pressure is greater than 1500kPa

• Coolant temp is above 104 degrees C

• When the ignition is switched off and the coolant temp is above 117 the ECM will continue to power the fan for approx. four minutes.

• ECT senor failure


ECM switch cooling fan off when:

• Air con is on and indcates 'NO' to the ECM and coolant temp is below 99 degrees C.

or

• Air con is on and indcated 'Yes' to the ECM with pressure less than 1170kPa and vechicle speed is greater than 50km/h and coolant temp below 99 degrees C.


Stage 2 fan operation

ECM switch cooling fan on when:

• ECT error

• Coolant temp above 108 degrees C

• Air con pressure above 2000kPa


ECM switch cooling fan off when:

• Coolant temp above 103 degrees C

• Air con indicates 'No'

• Air con indicates 'Yes' and the pressure is below 1500kPa.



Thermostat opens at 82 degrees C

Fully opened at 95 degrees C


VZ05 your temp gauge description sounds about the same as mine

 

[andyman]

ive never seen a vz go past just over quater, you fellas with the higher needle reading dont have air locks in your system?

 

[Torquative]

Ive had the Adventra fan stay on with ignition off, it did a 2 hour peak hour stop start trip from Penrith to Artarmon on a real hot morning.

In all our Zeds it runs pretty much like that, on 1/4 or just above. Just above the fan kicks in til it reaches just on the 1/4 mark, obviously coz the conditions have been met to activate the cooling fan.

If it reaches the 1/2 mark without any obvious reason, eg towing, super hot day, stop start etc then you have an issue.

Then again this is the Exec type dash Im referring too, other dashes might have a different needle reading for the same thing

 

[VZ05]

Thanks for all you replys from what I've read the engine is running at the correct temperature. IPCOlsenVZ thanks for all the infomation i'll be sure to test the thermostat at the temperatures just to double check.
Here is a picture that I going to post if anyone is unfamiliar with the markings.

 

[Torquative]

where that is seems to be the norm across our 3 Zeds, occasionally (like in traffic or stopped) it reaches a tad higher then that and sits just under the half way line til the fan kicks in and cools it down and brings the needle back to earth.

Dont forget, the engine is designed to run at a particular temperature range and having it too cool can cause damage :whistling

 

[2cool]

ive never seen a vz go past just over quater, you fellas with the higher needle reading dont have air locks in your system?

I have an SV6 which is different to the pick above, this is where mine sits and the arrow is where the fans come on and has never been past that

 

[andyman]

if seen a ve go past 3/4 and 134c as it had an air lock