Engine Noise Diagnosis

Fix Soon

Engine noises at idle, startup, or under load need to be separated by location, oil pressure, RPM change, and whether the noise is ticking, knocking, rattling, or hissing.

Get this checked soon — it will get worse over time.

Check These First

Before diving into diagnosis, quickly verify these:

1Choose the closest child symptom first.
2Check warning lights and fluid levels before road testing.
3Use the linked issue pages to confirm the actual failed part.
4Do not replace parts before the symptom path points to a specific test.

What exactly is it doing?

Pick the description that fits best.

Ticking at Idle

Fix Soon

Ticking at idle can come from low oil pressure, valvetrain noise, timing-chain noise, or an exhaust manifold leak. The first split is whether the oil pressure warning is present, where the sound is located, and whether it changes as the engine warms up.

See causes →