[Showdown]

Originally Posted by wprater

It will constantly flow through the cooler, but only go back to the tank after temp (around 180F) opening an annulus. Here is a great description and illustration of how the aux thermostat works.

https://forums.pelicanparts.com/porsche-911-technical-forum/927332-how-external-oil-thermostat-works-illustration.html

This operation is inconsistent with the diagram in the post you quoted and the functionality of the thermostat valve.

Oil under 180F from the engine should flow back to the tank, not to the cooler. Only after the oil from the engine is above 180F should it flow from the engine to the cooler and then back to the tank.

It sounds like the thermostat is installed incorrectly if that’s even possible, or that it plumbed incorrectly (more likely)


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