del Posted May 5, 2013 Share Posted May 5, 2013 hi all serviced my retro fitted 200 tdi 90 on saturday , took it out for a drive today ,got on the motorway got up to 50 heard a noise similar to a belt snapping - terrible noise and loss of power . pulled over callled rac, waited thought i might have done some serious damage but turned out to be the air hose to the air filter had detached , once refiited seemed to cure it does that sound about right? Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted May 5, 2013 Share Posted May 5, 2013 If the air hose from intercooler to turbo or intercooler to inlet manifold came off I'd say yes, but air filter to turbo hose wouldn't make it lose power. Quote Link to comment Share on other sites More sharing options...
del Posted May 5, 2013 Author Share Posted May 5, 2013 i suppose i didnt really loose power , just felt like if i revved the engine it was causing more noise and possibly more damage/ it was the pipe from the tubo to the air filter that had become detached, did notice it had a good coating of oil insde it Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted May 5, 2013 Share Posted May 5, 2013 The oil is not uncommon, there is normally an engine breather tee'd in somewhere which will have a tendency to blow oil in to that pipe. Also the noise would certainly change when you have no air breather connected. Especially as the revs increase. Quote Link to comment Share on other sites More sharing options...
del Posted May 5, 2013 Author Share Posted May 5, 2013 thats what must have happened when i changed the air filter, the pipe was dislodged, and then came apart on the motorway ,the noise was so loud it sounded like something in the thengine had blown ! Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted May 5, 2013 Share Posted May 5, 2013 Although it's unusual for there to be pressure in that pipe, it should be a vacuum as the turbo will be sucking air from that pipe. Quote Link to comment Share on other sites More sharing options...
del Posted May 6, 2013 Author Share Posted May 6, 2013 came back today with avengence as you probably guess by my other posting , i think it must be the turbo , soon as we head off it whines like a police car in the distance until it becomes unbearable and there is lack of power / going to take it to a garage saturday to see what they say does anyone know if ita a expensive fix? Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted May 6, 2013 Share Posted May 6, 2013 Take the air hose off that goes from the air filter to the turbo, stick your two fingers in the turbo (I hasten to add that you should be doing this with the engine off and COLD). See if the compressor wheel will move up and down much (it will probably move in and out), up and down movement is bad and indicates wear in the turbo bearings and in extreme cases leads to the fan blades hitting the cases. Check all the air hoses for an holes or leaks and ensure the hose clips are done up tight and try again to see if the noise is still there. If your turbo is knackered then you can normally get them reconditiond for a few hundred pounds. Quote Link to comment Share on other sites More sharing options...
Aragorn Posted May 6, 2013 Share Posted May 6, 2013 Take the air hose off that goes from the air filter to the turbo, stick your two fingers in the turbo (I hasten to add that you should be doing this with the engine off and COLD). See if the compressor wheel will move up and down much (it will probably move in and out), up and down movement is bad and indicates wear in the turbo bearings and in extreme cases leads to the fan blades hitting the cases. You've got that backwards. All journal bearing turbos will have some side-to-side play in the shaft, as this is taken up once the turbo bearing is supplied with pressurised oil. The play is typically small, but it will be present on even a brand new unit. Excessive play will allow the compressor wheel to touch the housing like you say, which usually results in a "dentist drill" type noise. In-and-out play however is a symptom of a worn thrust bearing, and indicates the turbos on its way out. A healthy turbo should have no detectable in-and-out play. Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted May 7, 2013 Share Posted May 7, 2013 Apologies, you are correct. Quote Link to comment Share on other sites More sharing options...
del Posted May 15, 2013 Author Share Posted May 15, 2013 thanks for all the replys, turned out to be a rubber washer from the air filter housing sucked into the turbo and stuck on the impeller! Quote Link to comment Share on other sites More sharing options...
western Posted May 15, 2013 Share Posted May 15, 2013 hope the blades are OK. might be rubber but those blades spin quite fast. Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted May 15, 2013 Share Posted May 15, 2013 thanks for all the replys, turned out to be a rubber washer from the air filter housing sucked into the turbo and stuck on the impeller! Well that is a new one! Glad you found it Quote Link to comment Share on other sites More sharing options...
Gremlin Posted May 16, 2013 Share Posted May 16, 2013 You are lucky, if it was the metal washer then it would have mauled the impeller and semi destroyed the engine! G Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted May 16, 2013 Share Posted May 16, 2013 You are lucky, if it was the metal washer then it would have mauled the impeller and semi destroyed the engine! G Well the bits of washer and turbo would have had to get through the intercooler first so engine may have been safe Quote Link to comment Share on other sites More sharing options...
Gremlin Posted May 17, 2013 Share Posted May 17, 2013 Ok fair point, but little bits of metal could get past the IC and down into the bores................. G Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted May 17, 2013 Share Posted May 17, 2013 Don't get me wrong, it certainly wouldn't be something I'd want to try out Was just pointing out that engine damage wasn't inevitable ..... but is possible Quote Link to comment Share on other sites More sharing options...
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