Why does my car squeal when I start it?

Concerns & risks

You were trying to back out quietly, but the engine squeals like a startled bird on cold mornings.

Belt problems can lead to breakdowns.

Causes & evidence

A squeal on startup is often a worn or loose drive belt. A mechanic can inspect it.

What to do

1. Note when it happens.
2. Have the belt and tensioner checked.
3. Replace worn belts.

Common mistakes: Common mistakes: ignoring it until a belt breaks, which can stop power steering, charging or cooling on some cars. Look for cracks or glazing on the belt with the engine off. A squeal that changes with steering might be power steering. A mechanic can check the belt, tensioner and pulleys together. Replace belts per your maintenance schedule. Note whether it happens only when cold or also after warming up, and whether it gets louder with AC or headlights on, which adds load. That detail helps the mechanic. Never touch belts or pulleys with the engine running.

Speed Man tip: Don't spray random products on belts.

Wrap-up: Often a belt. Get it checked. Replace if worn.