The car 2003 Volvo runs but there is a knocking noise, is this serious?

2003 VOLVO S60
127,750 MILES
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OSTOPOFFE
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car was well taken care of engines starts and runs but knocking noise is heard coming from the engine it sounds like.
Jan 31, 2012 at 9:20 AM
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MHPAUTOS
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Engine knock can often be a failed bearing on the crank shaft, if this is the case the engine if run much further will do serious damage.
Jan 31, 2012 at 11:21 AM
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JIS001
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If this is a none turbo engine then you most likely have been driving it with no oil. I agree with mhpautos that you will be damaging the crank shaft. Very common on none turbo engines to consume oil.
Feb 2, 2012 at 5:10 AM
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