renault4 Posted May 22, 2008 Share Posted May 22, 2008 can anyone describe the sound made when the big end bearings are going? I'v had a noise appeare lately, a load knocking, low down on the engine, but only when engine revs are high, not on tick-over. If it is big ends, can they be replaced with the engine in situ? Quote Link to comment Share on other sites More sharing options...
JimAttrill Posted May 23, 2008 Share Posted May 23, 2008 loud knocking noise more apparent on acceleration = big ends. They are normally changeable in situ. Please do say what engine it is you are talking about. If it is a Renault 4 I have no idea. Quote Link to comment Share on other sites More sharing options...
draper40 Posted May 23, 2008 Share Posted May 23, 2008 Yes, a rattling noise in the bottom of the engine. Try not to drive any more until fixed as within 3 minutes of the rattling starting I ended up with a large hole in both sides of the enigne and an engine replacement on my hands! Pete Quote Link to comment Share on other sites More sharing options...
Quagmire Posted May 23, 2008 Share Posted May 23, 2008 When a big end bearing went on my 2.25 the noise was horrendous, became very apparent all of a sudden. Like a loud deep metallic slapping- donk, donk, donk, donk. i stopped straight away and towed it back to my parents place where i found that the end cap bolts on one of them were not a the torque they should be. I was very lucky and got away without breaking anything or damaging the crank. I changed the bearings, retorqued and some 6000 miles later all is good. I was very lucky though. Quote Link to comment Share on other sites More sharing options...
renault4 Posted May 24, 2008 Author Share Posted May 24, 2008 loud knocking noise more apparent on acceleration = big ends.They are normally changeable in situ. Please do say what engine it is you are talking about. If it is a Renault 4 I have no idea. no not a renault 4 but a 200 TDi defender Quote Link to comment Share on other sites More sharing options...
draper40 Posted May 24, 2008 Share Posted May 24, 2008 Sort it otherwise you will end up with a large bill! Pete Quote Link to comment Share on other sites More sharing options...
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