1981 Mercedes Benz 300d Engine noise

1981 MERCEDES BENZ 300D
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JOHAN GJ OOSTHUIZEN
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1981 Mercedes Benz 300d Two Wheel Drive Manual 240000 miles

I hear an irregularly 'quack' noise. Oil pressure also low (1-2 Bar) at idling speed; even during cool weather.
Jun 3, 2010 at 2:28 AM
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DR LOOT
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when is the last time the timing chain was replaced?
Jun 16, 2010 at 1:34 AM