Knocking sound on acceleration when the heater gauge reaches quarter

Asked by Jun 06, 2017 at 01:11 AM about the 2006 Opel Corsa

Question type: Maintenance & Repair

There is a knocking sound when accelerating and the temperature gauge is on quarter, car not overheating. Already replaced coolant bottle cap.

1 Answer


The knocking is usually a rod bearing in the engine. As the engine warms up the oil is thinning out, the oil pressure drops. Have the oil pressure checked with a mechanical gauge to verify if the engine has the proper oil pressure when the engine is warmed up, while the engine is knocking.

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