Whats this sound ? (knocking from engine) - Alfa Romeo Forum
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Whats this sound ? (knocking from engine)


I have this sound from my car.
YouTube - sound1

YouTube - sound2

When it happened the sound was constant (ie. it was there all the time) and suspecting it was a big end failure, I left the car by itself so as not to have a conrod sticking out of the engine block.

Now however, the sound is not constant, and if it was a big end failure, the sound should be constant, no ?

So what could it be ?
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Big end falure doesn't always make a constant noise, especially if the engine is not under load.

I am afraid to say that it does sound like a big end failure to me.
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Does sound Big end also, or timing could be out and getting piston slap. But i'd say big end
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My god that sounds horrendous! Sump off would be my very next step.
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engine , knocking , sound

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