This bulletin applies to 2017-2018 Porsche 911 Turbo S vehicles. The customer may comment about an “Engine Too HOT” warning.

A coolant leak may be found in the coolant pump area. Due to a manufacturing error, the coolant pump may leak into the vacuum area.

In the event of a coolant loss, and if fault diagnosis indicates a leak in the coolant pump, all vacuum lines for the coolant pump must be checked for traces of coolant.

If traces of coolant are found in the vacuum lines, the affected vacuum lines together with the valve block must be replaced before doing any other work. The coolant pump must also be replaced.

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