Fuel Knock/Combustion Noise

WARNING: This page is about a different variant/trim than selected.

Inspect for obvious overheating problems. Refer to Engine Overheating .
Inspect for a low engine coolant level.
Inspect for a correct coolant solution. The solution should be a 50/50 mix of anti-freeze and water.
Inspect for any restricted air flow through the radiator. Refer to Radiator Cleaning .
Inspect for a malfunctioning or incorrect thermostat.
Inspect the fuel injectors for proper operation. Refer to Fuel Injector Balance Test with GDS 2 .