HELP Temp, gauge au I ute

Cookie-XR8 · 30-01-2009, 07:11 PM

hey guys, ive been driving my oldmans au ute while im getting the head done on mine,

when im driving up a hill and the engine is working the temp gauge shoots through the roof but the engine is not getting hot at all? what causes this? wha can i do to fix it?

cheers

:

InfernoSR · 30-01-2009, 07:24 PM

that can be caused if the water is a little low and the gradient of the slop is high enough for the sensor to not actually be submerged in water... top up the tank a little more, check it over a few days and see who much water you loose... see if it does it again also...

Cookie-XR8 · 30-01-2009, 08:12 PM

i did notice it was a little low only about 3 cm from the top, ill top it up before i drive home tomorrow and see what happens

thanks mate

InfernoSR · 30-01-2009, 08:23 PM

Quote:

Originally Posted by gnarlyau

i did notice it was a little low only about 3 cm from the top, ill top it up before i drive home tomorrow and see what happens

thanks mate

Not a problem at all... they do need a certain amount of expansion, so dont top it all the way up every day... just this once and record the changes over a week, then get back to me.

Cookie-XR8 · 30-01-2009, 09:09 PM

too easy

**Stav** · 31-01-2009, 03:54 PM

The au temperature sensor doesnt sit in the water jacket. You may have a dead thermostat so get another head ready if you dont read my post in time.

It may just be electrical though..

EvilChief · 31-01-2009, 09:03 PM

also if temp sensor fails thermosw wont work either

**Mechan1k** · 03-02-2009, 09:19 AM

Not sure on the AUI ... but I know AUII uses a Engine Cylinder Head Temp (ECHT) sensor in the driver's side rear corner of the head ... and as Stav mentioned it doesn't going into the water jecket ... just into the alloy only. If the temp sender fails ... your gauge will read off the top or the bottom all the time.

Id suggest if it's a load issues on a hot day ... it maybe a water pump corroded out (literally no internal vanes left) ... if doesn't need to be leaking for it to not work efficiently. I was lucky enough to find that out when trying to troubleshoot an overheating issue myself.

I gave up in the end though ... and traded my ute in before it got to Summer again.

I ended up replacing:
Header tank.
All hoses
ECHT sensor
radiator (with a twin core)
water pump
moved the external trans cooler
thermostat (twice)

I also had the thermofan relay mod done as well ... as soon as A/C is turned on .. the thermos come on High speed (until you turn the A/C off).

Also tried to replace the head gasket thinking it was that ... the head wouldn't part ... so I just put a replacement engine in it (only had 60,000km on it) ... was cheaper in the long run ... also replaced my auto at the same time for one that was built up for boost applications.

As I said ... gave up in the end and got rid of it.