[dd74]

Odd...my '74 has a numerical temperature gauge. And I thought all 911 engines have an engine oil cooler - not necessarily an external oil cooler.

My old 2.7 once reached well over 250 degrees while stuck in rush hour L.A. traffic. It actually ran fine, though constantly operating the engine at the temperature is ill-advised. I definitely would not drive the engine agressively at anything above 250.

Check under the car's right rocker panel. If you see piping going along there to the front right wheel well, and then inside the wheel well, see a small radiator, you have an external oil cooler. But like others said, standard '74s did not come with such a setup. I think they were a factory option.