Temperatures

Coolant Temperature

Engine coolant temperature. Monitors the health of the cooling system under load.

Why it matters

Rising coolant temp under repeated hard use signals the cooling system is overwhelmed. The ECU will intervene with thermal protection if temps get too high.

What to look for

Normal operating temp is ~195-210F. Above 220F is a warning. Above 240F triggers thermal protection (reduced power).

Related terms

Thermal Protection

When the DME reduces power output because temperatures have exceeded safe thresholds. Manifests as throttle closure or reduced boost target.

Heat Soak

When repeated hard use causes temperatures to build up faster than the cooling system can dissipate.

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