Why does my engine rattle on a cold start?

Dear Tim: It is not unusual to hear some engine when first starting on a cold start. The sound can either be from a hydraulic valve lifter, or piston-to-cylinder wall clearance. As the engine warms, the clearances change and get tighter and noises will usually disappear. The noise may not occur again for weeks.

Is cold start rattle normal?

Perfectly normal. The sound disappears almost instantly. If the sound had continued after the engine was running, then we’d have good reason to speculate about excessive clearances. Its a more common issue than people really want to admit.

Why does my car make a rattling noise when I start it?

If the rattling noise occurs when the car is stationary the origin is in the engine/transmission and/or exhaust system. If the identical rattle occurs when the car is moving, too, motor mounts or loose exhaust system components are a possibility.

Can a timing chain make a rattling noise?

When you hear a rattle or unusual sound, it means that there is a problem with the engine. When the timing chain is loose, it can cause a vibration in the motor resulting in a rattling noise as the engine idles or when starting. If you hear a rattle, it means something is loose and needs to be fixed before it breaks.

How do you quiet a timing chain rattle?

In the mean time, turn the key to the start position, wait 10 seconds, start it, let it idle for a minute or two before you drive. That will save some wear. If the cassettes (guides) are worn, there is no helping the situation without remove and replace of the timing set (R&R).

What is the rattling noise under my car when going over bumps?

A “rattle“ sound on light bumps (cracks in road): This is consistent with anti roll bar drop links that are worn out or that have snapped. Notably, this sound often goes away when a vehicle reaches higher speeds. Alternatively, this sound could also indicate worn-out shock absorbers.

What kind of noise does a bad timing chain make?

A bad timing chain will often emit a rattling sound for a few minutes before the engine warms up, and then will lower in intensity or dissipate altogether after it warms up.

What is the rattling noise in my engine?

Detonation, Pre-ignition (Pinging) Noise Most people call this a pinging or rattling sound. This noise is caused by an air/fuel mixture in the engine cylinder being ignited prematurely by the heat of compression as the piston is moving up on the compression stroke.

What causes timing chain engine noise Rattle-YouTube?

ENGINE NOISE RATTLE COLD START OR ALL THE TIME. WHAT CAUSES TIMING CHAIN ENGINE NOISE RATTLE – YouTube

Why does my VVT rattle when I start the car?

In certain cases, the VVT gear housing and sprocket could separate and result in the engine stopping while the vehicle is being driven, increasing the risk of a crash. Toyota theorized that the condition could be related to an engine noise issue at start-up being investigated on certain engines.

How can I tell if my timing chain is bad?

Once the belts have been removed, start the engine. Place the probe of the stethoscope on the top or side of the timing chain cover. If you hear a rattling or scraping sound, with no other noise being emitted from the engine, it indicates a bad timing chain. Do not run the engine excessively long with the belts off.

When does oil pressure come up does the engine Rattle?

(It comes up instantly, not slowly.) The engine “rattles” until the oil pressure comes up to normal. After the engine has been run, the oil pressure comes up within a second the rest of the day. (No rattling) Does the oil pump have to stay primed?

ENGINE NOISE RATTLE COLD START OR ALL THE TIME. WHAT CAUSES TIMING CHAIN ENGINE NOISE RATTLE – YouTube

Why is my FSI engine making a rattle noise?

Also keep in mind that I don’t know if your FSI engine is an older style using a timing belt with the hydraulic tensioner in the head for the cam chain, or if it’s the newer style with all chains.

Can a timing chain be replaced in a 2009 Ecotec?

The timing chain. A lot of times if the sound is fresh and you have a vehicle older then 2009 you have the old style tensioner and can get a new revision of it to replace your tiered old unit and be on your way.