190D 2.5 - diesel knock when cold

Adrianh1

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Hi, can anyone help?

Last night and this morning I experienced quite a loud knocking from the engine - briefly but very noticeable - when starting up from cold. It's never done this before. The car runs absolutely fine, but it just alarmed me. I run the car on premium BP and Shell fuel and change the oil every 3k. The car's done 190k but has been regularly serviced throughout - no skimping.

Any thoughts? The car runs fine, as I've said, but I'm just wondering what's causing this very brief knocking sound when firing up?

Any thoughts much welcome.

Adrian
 
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