Oil temps !!??
Discussion
ARAF said:
I admire your optimism, but as the water gauge has no scale, and doesn't register until the water is already quite hot, I doubt it would take much of a temperature rise to move the needle to the danger zone.
Most car gauges these days dont offer a true reflection of temperature.They're ecu controlled so that more often than not, they display to keep the driver happy.
So yes there could be quite large swings and variations in temperature and the needle will do very little
ARAF said:
but as the water gauge has no scale
I'll give it a google, but the gauge is designed to sit at the 3/8 mark during normal 'operation'As such, from 85 to 110, the gauge will stay at 3/8.
Any of the Torque style programs will give you the measured coolant temperature so you can have a proper gauge, or with a Monaro you can use one of the yank programs to recalibrate the temperature gauge
Whilst I had my R8 in the air on ramps doing an oil change I had a good look around and worked out whats needed for an oil cooler. Quite simple really although my Heartbeat Intercooler is bloody huge so space is a premium up front. Gotta work out what size rad (possibly 2 smaller ones) then il order up the parts as her indoors said she will pay! Sorted. 
Also waxoiled all the front as surface rust was evident although nothing to worry about really. Just peice of mind.
Also waxoiled all the front as surface rust was evident although nothing to worry about really. Just peice of mind.
Mine overheated this week- I mean the oil temp was at 130+ and then after about 20mins the water temp gauge went up to about 30% of the gauge, when I stopped it squirted out about a litre of coolant into my front drivers side wheel., i had overfilled the reservoir as I had changed the coolant last week and knew it would probably fall while driving.
on the G8 forums they reckon the water pump as the main culprit?- on mine it seems worse when on the back roads cruising at 45mph which should be the most effective cooling.
just wonder if they took off or revised the oil cooler for UK use?
on the G8 forums they reckon the water pump as the main culprit?- on mine it seems worse when on the back roads cruising at 45mph which should be the most effective cooling.
just wonder if they took off or revised the oil cooler for UK use?
MatrixXXx said:
Mine overheated this week- I mean the oil temp was at 130+ and then after about 20mins the water temp gauge went up to about 30% of the gauge, when I stopped it squirted out about a litre of coolant into my front drivers side wheel., i had overfilled the reservoir as I had changed the coolant last week and knew it would probably fall while driving.
on the G8 forums they reckon the water pump as the main culprit?- on mine it seems worse when on the back roads cruising at 45mph which should be the most effective cooling.
just wonder if they took off or revised the oil cooler for UK use?
If you overfilled the coolant, then it would be expected for it to spew some out when it gets hot.on the G8 forums they reckon the water pump as the main culprit?- on mine it seems worse when on the back roads cruising at 45mph which should be the most effective cooling.
just wonder if they took off or revised the oil cooler for UK use?
Water levels will rise when warm, so should never be overfilled.
I'd doubt there is a problem with the water pump ( unless yours has developed an actual fault )
Ive not had my adapter arrive yet to fit the temp gauge, however at TR I noticed temps would stay at 110 before and during the run but climb up to 120 on the cool down mile back to the pits which i found daft ??
I will report back with ACTUAL temp findings soon so we know how far out the gauge is (or isnt !)
I will report back with ACTUAL temp findings soon so we know how far out the gauge is (or isnt !)
ARAF said:
Anyone know where the oil temperature sender unit is on these engines?
I can't see it in my manual, nor find reference in a parts list.
From what I've worked out Ian this is the exact problem...there isn't one !!! The oil temps are derived by the ECU from ECT and other factors.I can't see it in my manual, nor find reference in a parts list.
If we had a stock temp sensor I could have replaced it with my ProSport one and plugged my proper gauge in by now. My adapter shouldn't be much longer so soon enough we will have REAL data.
ARAF said:
Cheers. I can't believe no one has mentioned that before.
yup, thats the whole reason of this thread...we simply dont know how far out the ECU's guess work is. It could be that the oil temps are fine and stable but the ECU calc's show it as being too hot, We simply do not know. The scary thing is everyone simply tells me 'thats normal' and 'they all do that' lol.
Soon enough we shall know for sure.
MatrixXXx said:
Here it is, but i dont think we have oil level either. the "L" i would assume denotes "level" rather then Pressure
There is an oil level sensor, and also a pressure switch. I just couldn't find the temp sensor, so wondered if it was wired in elsewhere.Edited by MatrixXXx on Friday 15th August 16:32
I have done a bit more 'testing' to work out what is what regarding the temps. It appears from what Ive read the oil temps are derived from ECT figures, however a few checks seems to say otherwise.
I did a few 0-60 runs the other night trying out my new VBOX and saw oil temps had climbed to the 120* mark. I switched car off and restarted with the dash in 'Engineering Mode' where I saw the ECT was 92*. So yesterday when I went out from cold I ran in Engineering Mode again and noted that the ECT temp reached 88* while the oil temp was only 70. Then the ETC stayed at 88-90* while the oil temps gradually rose until they settled at 110*.
So there was NO direct correlation between the two temps at all. This leads me to believe there must be a temp sensor, possibly incorporated in the low level sensor, which could in fact be giving us more accurate readings than we giving it credit for.
When my adapter finally arrives from the states it will be the very first thing I do !
I did a few 0-60 runs the other night trying out my new VBOX and saw oil temps had climbed to the 120* mark. I switched car off and restarted with the dash in 'Engineering Mode' where I saw the ECT was 92*. So yesterday when I went out from cold I ran in Engineering Mode again and noted that the ECT temp reached 88* while the oil temp was only 70. Then the ETC stayed at 88-90* while the oil temps gradually rose until they settled at 110*.
So there was NO direct correlation between the two temps at all. This leads me to believe there must be a temp sensor, possibly incorporated in the low level sensor, which could in fact be giving us more accurate readings than we giving it credit for.
When my adapter finally arrives from the states it will be the very first thing I do !
The schematic above is quite clear. There is a low level switch and a rheostat in a combined unit.
I did stick a temp sensor onto mine, just havent had a chance to give the car a blast to see if temps actually go anywhere nasty.
With just a couple of brief blasts, Oil temp never exceeded 90degC, although Ive also a colder stat at the minute so ECT sits around 73-75degC most of the time.
Hopefully doing a hillclimb next week ( if its dry ) so that should offer some better info.
If it stays dry this evening, might take a run up to check out the hill, as have never driven it before.
I did stick a temp sensor onto mine, just havent had a chance to give the car a blast to see if temps actually go anywhere nasty.
With just a couple of brief blasts, Oil temp never exceeded 90degC, although Ive also a colder stat at the minute so ECT sits around 73-75degC most of the time.
Hopefully doing a hillclimb next week ( if its dry ) so that should offer some better info.
If it stays dry this evening, might take a run up to check out the hill, as have never driven it before.
stevieturbo said:
The schematic above is quite clear. There is a low level switch and a rheostat in a combined unit.
I did stick a temp sensor onto mine, just havent had a chance to give the car a blast to see if temps actually go anywhere nasty.
With just a couple of brief blasts, Oil temp never exceeded 90degC, although Ive also a colder stat at the minute so ECT sits around 73-75degC most of the time.
Hopefully doing a hillclimb next week ( if its dry ) so that should offer some better info.
If it stays dry this evening, might take a run up to check out the hill, as have never driven it before.
That's good to know someone else has fitted a temp gauge, Do you still have the stock one in the dash ? If so how did the two compare ?I did stick a temp sensor onto mine, just havent had a chance to give the car a blast to see if temps actually go anywhere nasty.
With just a couple of brief blasts, Oil temp never exceeded 90degC, although Ive also a colder stat at the minute so ECT sits around 73-75degC most of the time.
Hopefully doing a hillclimb next week ( if its dry ) so that should offer some better info.
If it stays dry this evening, might take a run up to check out the hill, as have never driven it before.
Still find it crazy that its taken 7 years to decide this needs some proper investigation as to whether its an issue or not
fastbikes76 said:
Still find it crazy that its taken 7 years to decide this needs some proper investigation as to whether its an issue or not
It hasn't. The problem has previously been visited. For Kaw, he fitted a cooler. I decided the gauge was probably faulty, so didn't pursue the oil cooler route.fastbikes76 said:
I have done a bit more 'testing' to work out what is what regarding the temps. It appears from what Ive read the oil temps are derived from ECT figures, however a few checks seems to say otherwise.
I did a few 0-60 runs the other night trying out my new VBOX and saw oil temps had climbed to the 120* mark. I switched car off and restarted with the dash in 'Engineering Mode' where I saw the ECT was 92*. So yesterday when I went out from cold I ran in Engineering Mode again and noted that the ECT temp reached 88* while the oil temp was only 70. Then the ETC stayed at 88-90* while the oil temps gradually rose until they settled at 110*.
So there was NO direct correlation between the two temps at all. This leads me to believe there must be a temp sensor, possibly incorporated in the low level sensor, which could in fact be giving us more accurate readings than we giving it credit for.
When my adapter finally arrives from the states it will be the very first thing I do !
Just to add to this, I tried reading my oil temperature via the OBD port using the Torque app, and I noticed that the figure the ECU sent was never the same as the Oil Temp gauge on the dash - often the dash would be 20C or more higher than the reading from the ECU. I don't think either can be trusted until we know how each one reads (or guesses) it's figureI did a few 0-60 runs the other night trying out my new VBOX and saw oil temps had climbed to the 120* mark. I switched car off and restarted with the dash in 'Engineering Mode' where I saw the ECT was 92*. So yesterday when I went out from cold I ran in Engineering Mode again and noted that the ECT temp reached 88* while the oil temp was only 70. Then the ETC stayed at 88-90* while the oil temps gradually rose until they settled at 110*.
So there was NO direct correlation between the two temps at all. This leads me to believe there must be a temp sensor, possibly incorporated in the low level sensor, which could in fact be giving us more accurate readings than we giving it credit for.
When my adapter finally arrives from the states it will be the very first thing I do !
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