Audi A3 14 Tfsi Engine Oil (Lizzie Barnes) May just be poor oil circulation or bad batch of tensioners. The most common issue is a stretched timing chain and timing chain tensioner failure. The real problem here is that this will usually occur when you have turned your engine.
The loose chain is to blame for multiple occurances of catastrophic engine failure.
We carried out a diagnostic code read to find the reason for the EML light to be on which gave us several codes relating to an incoherence between the cam and crank shaft sensors.
As retroman says, Audi chain tensioners are usually oil pressure operated hence the rattle from cold. Eventually if these chains stretch your engine can jump timing, causing catastrophic damage. The most common issue is a stretched timing chain and timing chain tensioner failure.
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