13. Excessive exhaust gas temperatures

Turbochargers are built to withstand the high temperatures generated during normal operation conditions, but excessively high exhaust temperatures can cause catastrophic damage. Typically, this damage is located around the turbocharger’s turbine, cracking the housing, causing excessive erosion and corrosion, whilst causing collateral damage to other components, such as the wastegate.

How to prevent it

Excessive exhaust gas temperature (EGT) can be caused by various complaints, including poor quality oil, faults in the oil cooling system, incorrect mapping, poorly executed engine modifications and skimping on

essential maintenance. To ensure your Porsche’s EGT is staying within a safe range, fit an EGT sensor, ideally one that feeds back to the ECU. That way, if the temperatures dramatically increase beyond what’s deemed safe, the engine can be shut down before any damage is done.