VS Temp Gauge with High Flow Thermostat

[AXA79R]

Hi Guys,

I lost my password for my old logins (yyg-988, and ORIXvywags)

Ive been reading up a fair bit, on VS series I temp Gauge, and know the temp is normal

but I changed the sender unit today, and put a high flow thermostat in the car

but letting the car sit running, it makes the gauge, sit pretty bloody high

just wanna know, by lookin at the pick I attached let me know what you think

[James39]

Replaced the Temp sender or the Sensor for the guage in the cluster?

Maybe the thmostat is not opening or the system needs bleeding or even you could of installed the themostat wrong (upside down)

Today I replaced my temp sender to find it was a waste of time as the fan still kicks in at the same point as the old one did lol....

[AXA79R]

Hmmmmm, the crazy thing is, I got one of the Holden Mechanics at work to do it, ..... and they said the temp it normal
I will defo check it out tomorrow

I just wanted the thermostat to open up earlier, improve the cooling over summer and improve fuel consumption

[hako]

Never knew they made high flow thermostats but I guess you'd only notice the difference at higher revs and not at idle. If the cooling fan turned on at 3/4 (as in the pic) then all is normal. Why did you replace the sender if you knew it was OK, and as James39 asks, was it the sender with one or two wires?

[VR38]

Not quite sure I understand what a high flow thermostat is supposed to do, the way i see it, the thermostat controls temp, opening more to cool more so if it was high flow it would cool even more requiring it to close more to maintain temp??? sort of defeats the purpose.

FYI with the high temp as stated either the system needs bleeding bad or the new thermostat is faulty or the new sender is faulty.
Do you have a thermometer to take a proper temp reading?

[shadetreemechanic]

Mate, I'd check to see if it's really getting that hot by the looks of that temp gauge your engine would be cooking itself, but if all seems normal then more likely the sensor you installed is incorrect...

Btw, all that a high-flow thermostat does is cool the motor more efficiently once the temp is over its set limit. By allowing more water to go through and circulate into the radiator...pretty simple really

[Andrew426]

If you can get a lazer temp gun, use it to check your actual engine temperature to rule out a dodgey sender.

[BlackVXGTS]

The temperature sender unit used in VS V6s was carried over from VRs, but the location was changed to a hotter part of the engine. This may cause higher temperature readings on the gauge before the thermo fan cuts in. In mid 1997, the sender unit was revised to suit the new engine position and engine temperatures, and shows a lower reading on the gauge before thermo fan activation. You may have replaced the sender unit with a pre-1997 unit, particularly if you purchased an after-market version.