David S. Wallens
David S. Wallens Editorial Director
9/22/21 9:10 a.m.

Tapping or ticking from the top end of the engine
→ Loose valves or other valvetrain issues

Tapping or ticking from the bottom end of engine
→ Main or rod bearing issues

Rushing air sound that increases with engine speed
→ A loose component in the intake tract

Scree…

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