Engine Ticking Noise
A tick that follows engine speed is usually valvetrain or an exhaust leak. A tick on a cold start that fades can mean low oil pressure at the top of the engine.
What it feels like
- A rhythmic tick that speeds up as you rev the engine
- A rattle for two or three seconds on a cold start, then silence
- A tick that is louder from underneath than from above
- A tap that appears only when the oil is due for a change
Codes that usually produce this
Check these first, in this order
Free checks first. Nothing here costs money except the fuel you burn.
- 1
Check the oil level and color on the dipstick with the engine off and cold.
What you'll seeFull and amber. Low or black oil causes top-end ticks that a change often fixes.
- 2
Use a stethoscope or a long screwdriver against the valve cover and then the exhaust manifold to locate the sound.
What you'll seeA clear location. Valve cover means valvetrain; exhaust manifold means a leak.
- 3
Listen on a cold start and time how long the rattle lasts.
What you'll seeUnder one second is normal. Two or three seconds points at a chain tensioner.
Stop and get it looked at if
- The tick becomes a heavy knock under load.
- A rattle at cold start lasts more than three seconds.
- Oil pressure warning appears at idle.