Oil Temp
- Thread starter PHB1969
- Start date
PHB1969
PCGB Member
Hi Gordon
There was a recall a few years back for retro fitting of rear air intake grilles (those just ahead of the rear wheel arches). Apparently it was due to the US market and cigarettes potentially being drawn into the airbox if thrown out of the window! Had them fitted on my base Cayman about 4 years ago. Earlier this year maybe May/June got another recall on the 2.5 GTS - side grilles again. Believe they are a different design and not required on the 4.0 cars.
Not to be confused with radiator grilles or aftermarket side grilles.
There was a recall a few years back for retro fitting of rear air intake grilles (those just ahead of the rear wheel arches). Apparently it was due to the US market and cigarettes potentially being drawn into the airbox if thrown out of the window! Had them fitted on my base Cayman about 4 years ago. Earlier this year maybe May/June got another recall on the 2.5 GTS - side grilles again. Believe they are a different design and not required on the 4.0 cars.
Not to be confused with radiator grilles or aftermarket side grilles.
Paul,
I canāt really see the connection between the fitment of the side grilles and your oil temperature observation. Obviously the oil and filter have been changed, but again I canāt see how that has any bearing on the matter ā¦ just check that the oil level is correct.
The oil system is very complex and includes a temperature regulated oil-to-coolant heat exchanger, and if the 718 F-4T engine is anything like the DFI F-6 engines it will have an on-demand oil pressure pump, all of which means that itās impossible to explain why suddenly youāre seeing unexpected oil temperature fluctuations. If youāre concerned then the best course of action will be to talk to your dealer and maybe request a diagnostic check to ensure that allās well.
Jeff
I canāt really see the connection between the fitment of the side grilles and your oil temperature observation. Obviously the oil and filter have been changed, but again I canāt see how that has any bearing on the matter ā¦ just check that the oil level is correct.
The oil system is very complex and includes a temperature regulated oil-to-coolant heat exchanger, and if the 718 F-4T engine is anything like the DFI F-6 engines it will have an on-demand oil pressure pump, all of which means that itās impossible to explain why suddenly youāre seeing unexpected oil temperature fluctuations. If youāre concerned then the best course of action will be to talk to your dealer and maybe request a diagnostic check to ensure that allās well.
Jeff
Thanks for info re retro fitting of grilles above, Paul. I know that I am not helping to explain your problem (!) although Jeff's suggestion seems a good one.
I have never bothered fitting these grilles although I have done the front ones, of course. I am now wondering whether it is a good idea on the earlier models - Jeff?
I have never bothered fitting these grilles although I have done the front ones, of course. I am now wondering whether it is a good idea on the earlier models - Jeff?
Gordon,
I think the side grille recall only applies to the 718s (with their bigger intakes?), in response to an āincidentā in the US as Paul says. Ralph reckons that a lot of rubber debris gets ingested on his 718 GT4 during his frequent track day outings (Iām not sure that he experienced the same with his 3.8L 981 CS), but I wouldnāt have thought it necessary if your car is primarily for road use ā¦ unless you want to take a belt-and-braces approach.
Jeff
I think the side grille recall only applies to the 718s (with their bigger intakes?), in response to an āincidentā in the US as Paul says. Ralph reckons that a lot of rubber debris gets ingested on his 718 GT4 during his frequent track day outings (Iām not sure that he experienced the same with his 3.8L 981 CS), but I wouldnāt have thought it necessary if your car is primarily for road use ā¦ unless you want to take a belt-and-braces approach.
Jeff
AndrewCS
Active member
PHB1969 said:
Engage SPORT and watch the temperatures reduce by `up to` 10`C, note any similar oscillation ...
(In recollection - my previous 981 Cayman S without centre radiator also operated in this / the same manner hence consider the `centre radiator comment irrelevant)
In hot weather on my 981 I have frequently seen the temp staying up in the 111 /112 range. So I don't think you should be concerned about a small rise. A change of that order and more variability could easily be down to new oil / ambient conditions and useage. As long as the temp stays out of the red I am sure it will be fine.
AndrewCS
Active member
Hi folks. On the long drag from Calais to Luxembourg this week I was able to check out the impact of pressing the Sport button on coolant temperatures.
Each option was used for 100+ continuous kms
All motorway at steady 130 (ish) kph
Similar traffic conditions throughout
Ambient temperature 26-28C
I started in normal mode and the oil temperature held steady at 110C with a couple of short intervals at 111C for about 100kms Water rock steady at 90C
I switched to sport mode and the oil temperature quickly started to drop. Afer around 20kms it had settled at 95C and stayed there for another 80 k's or so. Water still at 90C
I switched back to normal mode and the oil temperature rose steadily over the next 20kms settling back at 110.
There was no discernable change in fuel consumption.
I admit, I did not know it did that! I wonder how many Cayman owners do? I am going to have a carefull read of the owners manual to see what it says, if anything.
Now I do know, the big questions is what to do with the information. I now have the option of running at 110 or 95. Which is better, or does it not matter? Since both are well within acceptable range on the gauge, I suspect that it doesn't matter and that the boffins at Porsche will bring in the extra cooling if needed. Indeed, in 40C heat earlier this year the oil temp was getting up to 113C but no ill effects resulted.
Food for thought. John
Each option was used for 100+ continuous kms
All motorway at steady 130 (ish) kph
Similar traffic conditions throughout
Ambient temperature 26-28C
I started in normal mode and the oil temperature held steady at 110C with a couple of short intervals at 111C for about 100kms Water rock steady at 90C
I switched to sport mode and the oil temperature quickly started to drop. Afer around 20kms it had settled at 95C and stayed there for another 80 k's or so. Water still at 90C
I switched back to normal mode and the oil temperature rose steadily over the next 20kms settling back at 110.
There was no discernable change in fuel consumption.
I admit, I did not know it did that! I wonder how many Cayman owners do? I am going to have a carefull read of the owners manual to see what it says, if anything.
Now I do know, the big questions is what to do with the information. I now have the option of running at 110 or 95. Which is better, or does it not matter? Since both are well within acceptable range on the gauge, I suspect that it doesn't matter and that the boffins at Porsche will bring in the extra cooling if needed. Indeed, in 40C heat earlier this year the oil temp was getting up to 113C but no ill effects resulted.
Food for thought. John
AndrewCS
Active member
The engine temperatures in non Sport mode are higher ... in order to provide enhanced engine - fuel efficiency
The recently posted Service information contains relevant details of how the cooling system operates [strike]but not in great detail[/strike]. The diagram below is from page 33 of the recently posted GT4 Service Information
EDIT : See Page 26 Section 2.8 Thermal Management for system detail ... not sure if other models are the same ?
The recently posted Service information contains relevant details of how the cooling system operates [strike]but not in great detail[/strike]. The diagram below is from page 33 of the recently posted GT4 Service Information
EDIT : See Page 26 Section 2.8 Thermal Management for system detail ... not sure if other models are the same ?
..and the Water Temperature displayed (90c) is not the actual temperature unless it is out of parameters, so as not to scare Americans.
AndrewCS said:
Incredible complexity! Clearly, gone are the days when the thermostat was operated by a wax-filled cylinder Andrew.
As Iāve noted elsewhere before, the coolant operating temperature is 105 degC, with an operating range of 85-105 degC, although as Ralph pointed out the gauge shows only 90 degC at normal operating temperatures, well below actual operating temperature.
From Johnās comments it appears as though Porsche have chosen to display the actual oil temperature. Presumably they reckon most owners donāt bother to monitor it actively?
I would imagine that the described thermal management system is common across a series, maybe with minor tweaks for the GT4?
Jeff
AndrewCS
Active member
Aye Jeff ...
I have always set my right hand instrument cluster to show engine temperatures - pressures - voltage
The engine data on the previous 981 Cayman S PDK without the central radiator indicated / behaved much the same as the GT4 does, both out of and in SPORT mode. I `think` that Cayman R was also much the same
NOTE : the 981 Cayman S PDK like the manual GT4 had a transmission water / oil exchanger. Not sure if manual 981`s apart from the GT4 have this exchanger ?
I hardly ever see that inferred `norm` of 90`C on the water, when cruising out of SPORT I see 105 - 110` water with 115` oil. Cruising in SPORT shows 85 - 90` water with 95` oil. Loading up the engine in 2nd and 3rd on favoured A - B roads in either mode sees regular changes in values [
]
I have always set my right hand instrument cluster to show engine temperatures - pressures - voltage
The engine data on the previous 981 Cayman S PDK without the central radiator indicated / behaved much the same as the GT4 does, both out of and in SPORT mode. I `think` that Cayman R was also much the same
NOTE : the 981 Cayman S PDK like the manual GT4 had a transmission water / oil exchanger. Not sure if manual 981`s apart from the GT4 have this exchanger ?
I hardly ever see that inferred `norm` of 90`C on the water, when cruising out of SPORT I see 105 - 110` water with 115` oil. Cruising in SPORT shows 85 - 90` water with 95` oil. Loading up the engine in 2nd and 3rd on favoured A - B roads in either mode sees regular changes in values [
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