What oil temperature is too high for the cylinder head gasket?

Since I also have a chip installed (Passat 1Z), I was wondering what the approximate oil temperature should be to avoid overstressing the head gasket or other components. Is there a temperature at which you should downshift?
Currently, I'm reaching approximately 126 degrees Celsius when running at full load.

Hi,

"My car's standard oil temperature, when running at full load on the highway in the summer with the air conditioning on, reaches up to 135 degrees Celsius, as measured by a dipstick sensor in the oil pan." Therefore, your values are either harmless, or Seat was negligent in the design of the cooling system in my car.

Best regards,

Jan.

Hi,

I would start to drive a bit more gently from 140°C onwards. In the gasoline-powered Corrado, temperatures of 150° were not uncommon...

Regards,
arne

You are very brave. I usually start easing off the accelerator around 120 km/h.
VW states a maximum of 130°C, measured in the oil pan.
However, it seems that this has been the standard value for a long time, as they also specified the same value for my old 2-liter air-cooled engine.

Regards,
dieter

Hi,

With my homemade and boiling-water-calibrated measuring device (which, however, works well with the water temperature and logic, and the almost linear PT100 sensor makes it easy to adjust), you can already reach 120 degrees Celsius at a constant speed of 180 km/h (speedometer) on the highway, even with not-too-high outside temperatures, and also during long journeys with a trailer in the summer.

However, the water temperature remains steadfastly at the 90-degree mark.

Best regards,

Jan.

Hello,

To the best of my knowledge, VW specifies a maximum oil temperature of 150°C in the oil pan. And they have done so since the early days of the Golf 1 GTI. After the oils have improved significantly in the meantime, this is absolutely not a problem.

My wife's V6 gasoline engine always shows 130°C (266°F) at 3,000 RPM when driving on the highway.

Don't worry about it.

Regards,

Manuel.

Good evening!

My AHU engine, with its VDO oil temperature gauge in the oil pan (just like Jan checked its functionality using a kettle), reaches approximately 130 degrees Celsius at full load on the highway, with an outside temperature of 20 degrees Celsius.
Now, with the 216 injectors and original software, the temperature goes up to about 140 degrees, but at 4300 rpm instead of 4000. However, I don't run it like that for more than 2 or 3 minutes, because it's too extreme, or because I'm worried about the engine and - keyword: drum brakes . Therefore, please also tell me what oil temperatures are still within the acceptable range. (I was already considering getting an additional oil cooler.)
My post may not be directly related to the main topic of the thread, but it seems that several forum members are concerned about what oil temperature is still considered healthy.


Best regards,

kapernaum wrote:

Good evening! My thread, although

it doesn't have anything to do with the thread's question, apparently, there seems to be some uncertainty among several forum members about what oil temperature is still considered healthy!

And also, it confirms my belief that I'm not just posting garbage here – it seems there are people here who think it's cool to constantly give me negative karma points... Thank you very much at this point

Does anyone now know whether a temperature of 130-140 degrees Celsius should be considered normal or critical? I'm really interested in that.

Up to just below 150°C in the bath is permissible for TDI. The original software, at least, doesn't allow for anything more.
"130° at 20°C ambient temperature at maximum speed is still within acceptable limits; this provides enough reserve even for hot days."
That means the temperature in the coolant reservoir is around 150°F, but can reach up to approximately 165°F in hotter areas, or even higher temperatures when the engine is turned off.
I don't know whether or not the oil can withstand those temperatures, and if so, how.
We'd need an expert in lubricants to clarify that. (My brain is vaguely recalling something about a permissible peak temperature of 200°C for modern oils used in engine manufacturing.)

Best regards,

bafische wrote:

Up to just below 150° in the tank is permissible for TDI. That's all that the original software, at least, allows.

Hi bafische,

That would mean that TDIs must have an oil temperature sensor connected to the engine control unit (ECU).

However, many cars don't have a sensor at all, for example, my ex-AFN G3, or my partner's ALH Ibiza.
How is the engine management system supposed to know the oil temperature in vehicles like that?

Where a sensor is installed (e.g., in my Polo), it is likely primarily connected to the instrument cluster (IC) for vehicle information and entertainment (IVI) purposes, and may only be evaluated by the main system gateway (MSG) via the CAN bus.

Hi Ulf,

I never claimed that all VAG (Volkswagen Group) or other OEM (Original Equipment Manufacturer) TDIs have an oil temperature sensor. However, there are enough engine control units (ECUs), including those from VAG, that process this information (otherwise, the engine specialists would be foolish to ignore it if the data is already available). Typically, the performance drops off around 150.
... even with your Polo.
Best regards,