engine knock · metallic knocking sound engine
A rhythmic, metallic knocking or tapping sound coming from the engine, often changing pace with engine speed.
Check the oil level and oil pressure warning light immediately - if the oil light is also on, stop the engine as soon as safely possible.
Not recommended, especially if paired with a lit oil pressure warning light. A rod knock in particular can lead to sudden, complete engine failure.
Describe your situation more precisely (e.g. exactly when it gets worse, how long it lasts) and get an expanded, personalized breakdown.
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Descriptions are for guidance only and do not replace a workshop inspection. If you are ever unsure whether it is safe to keep driving, pull over in a safe spot.
Rough or shaky idle
WarningThe engine feels rough, shaky or uneven while sitting still (in park or at a stoplight), as opposed to running smoothly.
Engine stalls while driving or idling
SeriousThe engine unexpectedly shuts off entirely, either while idling (at a stop) or, more seriously, while actively driving.
Car vibrates or shakes at idle
WarningThe car shakes or vibrates noticeably while stationary with the engine running (in park or neutral), but smooths out once moving.
Squealing noise right after starting the engine
WarningA high-pitched squeal that happens right when the engine starts, especially on a cold morning, and often fades after a few seconds.
