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.
Why does my Mercedes Benz cold start make a rattling noise?
There is a strange sound coming under the hood on cold start – below the freezing point. As it gets colder, the sound stays longer. At a couple of degrees below, the noise stays on for about 1 sec. and at 20F, it increases to about 3 secs. It started last winter with 35K mi.
Is it normal for a VW engine to rattle?
I’ve certainly heard the same thing from many modern VW/Audi engines and professionally I consider it normal and harmless, although I find their 4 cylinder engines to be absurdly noisy in general and find that startup noise and general engine noise unacceptable personally.
Why does my car make a rattle noise when I start it?
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. Some people started using thicker oil, and some people switched to using only European oil, witch is expensive as hell.
Why does my car rattle on cold start?
If you hear engine rattle noise from your engine on cold start, and the engine rattle noise goes away after a few seconds, and the engine rattle noise comes from the side of the timing cover we will explain what could cause that. Most new engines nowadays are equipped with timing chain.
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.
I’ve certainly heard the same thing from many modern VW/Audi engines and professionally I consider it normal and harmless, although I find their 4 cylinder engines to be absurdly noisy in general and find that startup noise and general engine noise unacceptable personally.
What causes a loud cold start knock noise?
I don’t think there is anything (maybe a rebuild) that will fix the piston slap. The lifter noise is usually dirt and, or wear, that lets the lifter “bleed down”. Sometimes as @ Conlan Rose suggested, it might be a slow to build oil pressure issue, that is caused by a dirty oil filter, sometimes it’s clogged oil passages.