Is It Normal for a Corolla Engine to Have Abnormal Noises?
1 Answers
If the vehicle exhibits a ticking sound during the transition from cold to warm engine state, lasting about 3 minutes, it is a normal phenomenon and not a problem. This is due to the larger valve clearance in a cold engine and poor lubrication. However, if the sound occurs during acceleration, it is not caused by the valves. Other possible reasons include: 1. Mild knocking: It could be slight knocking. 2. Mild piston slap or ring sticking: There might be slight piston slap or ring sticking. 3. Cylinder wall protrusion: It could be due to cylinder wall protrusion, requiring inspection by an experienced technician.