dizzydisco Posted January 26, 2009 Share Posted January 26, 2009 Hi folks just bought my first disco a 97 300tdi, and think I might have bitten off more than I can chew. I’m in need of a little bit of advice, when I bought her she was making a ticking, tucking noise from the engine, the noise only appears if I press the accelerator a third of the way down, if I drive her with a light right foot she runs almost silently. I put it down to the large hole in the exhaust just before the back box. Changed the exhaust thinking this would resolve it, still there!!! Changed the fuel lift pump still there!!!! The vacuum pump looks like new so think it was changed by the previous owner. Any one got any ideas?? She doesn’t smoke or use any water or oil. Quote Link to comment Share on other sites More sharing options...
Rolly Posted January 27, 2009 Share Posted January 27, 2009 Exaust manifold gasket? Quote Link to comment Share on other sites More sharing options...
signia Posted January 27, 2009 Share Posted January 27, 2009 Mine's been diagnosed as a possible tappet. I have two sets of ticking noises. When cold, you can hear the exahust manifold gasket ticking away. When warm and you're cruising along, the engine is quiet. When you apply the throttle, a different type of ticking from the back of the engine is very obvious in the cabin - that's the suspected tappet. I'll just add it on to the list of other things that need sorting over the next few months.... Quote Link to comment Share on other sites More sharing options...
DrRob Posted January 27, 2009 Share Posted January 27, 2009 Could be the little collets (?) that sit on top of the valve springs....someone will no doubt correct my terminology!!! I have a similar problem and it was a simple fix... HTH Quote Link to comment Share on other sites More sharing options...
dizzydisco Posted January 27, 2009 Author Share Posted January 27, 2009 Had a look at the exhaust manifold to day couldn’t really see much,(didn’t sound like it was blowing) is there anything I should be looking for soot deposits? Can I test the gasket? The more I press the accelerator the deeper the ticking gets. Could the head gasket have gone even thou its not using water or oil? Quote Link to comment Share on other sites More sharing options...
Thys Posted January 27, 2009 Share Posted January 27, 2009 Could it be one of the injector washers in the initial stage of failing, mine had that problem, and it was difficult to define and pinpoint the noise? Quote Link to comment Share on other sites More sharing options...
dizzydisco Posted January 28, 2009 Author Share Posted January 28, 2009 Picked up a new manifold gasket and 4 copper washers for the injectors, so off in to the garage for the night............ Quote Link to comment Share on other sites More sharing options...
Thys Posted January 28, 2009 Share Posted January 28, 2009 Picked up a new manifold gasket and 4 copper washers for the injectors, so off in to the garage for the night............ DizzyDisco, Good luck, and keep us posted on you progress. Quote Link to comment Share on other sites More sharing options...
DC_ Posted February 22, 2009 Share Posted February 22, 2009 Was it a fix then? Quote Link to comment Share on other sites More sharing options...
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