Mark Adams Posted December 5, 2012 Share Posted December 5, 2012 Driving home in the Disco I noticed that when I stopped at a roundabout, I saw the oil pressure light came on, flickered at first, I quickly turned off the engine and then started it. The light went off and did not came back on until I parked up at home, when it started flickering again. Do you think this is just faulty wiring/sensor or a genuine oil pressure problem? Seems strange that it goes off when the engine is turned off and on again. Quote Link to comment Share on other sites More sharing options...
Team Idris Posted December 5, 2012 Share Posted December 5, 2012 For me it normally means wallet time, but you may have better luck Best thing is a proper gauge so you can tell what is going on. Quote Link to comment Share on other sites More sharing options...
Boydie Posted December 6, 2012 Share Posted December 6, 2012 low oil level can be the cause --- a good indicator of this is did the flicker occur during a sharpish turn? Even so I agree with Idris, fit a guage, mine runs on 7psi at hot idle and 27psi with 10 psi boost at 2000 rpm = 100kph cruising speed. Quote Link to comment Share on other sites More sharing options...
Mark Adams Posted December 6, 2012 Author Share Posted December 6, 2012 If it is a mechanical problem then I guess the big end bearing shells are the most likely cause, does anyone know what these are like to change? I have a fully kitted workshop and pit and would regard myself as above average DIY mechanics but never changed these before. Quote Link to comment Share on other sites More sharing options...
Mark Adams Posted December 6, 2012 Author Share Posted December 6, 2012 the oil level is on the max mark, it happened when stopping at a junction, it was fine until then. Quote Link to comment Share on other sites More sharing options...
disco_al Posted December 6, 2012 Share Posted December 6, 2012 change the sensor first - could just be a faulty/blocked one causing a dodgy signal to the light. ultimately get a decent gauge to keep an eye on what's going on. when was the oil last changed? Quote Link to comment Share on other sites More sharing options...
fatbloke Posted December 6, 2012 Share Posted December 6, 2012 Is it a 200tdi ? Quote Link to comment Share on other sites More sharing options...
Mark Adams Posted December 6, 2012 Author Share Posted December 6, 2012 It is a 300tdi. Quote Link to comment Share on other sites More sharing options...
Mark Adams Posted December 6, 2012 Author Share Posted December 6, 2012 I have just got it mot'd after sitting for a long time so the oil has been in the car for about a year but only done about 1000 miles in that time. I am going to change it with 15/40 mineral oil as it will need a change, I will change the oil pressure switch at the same time. Do you recommend a particular brand of Oil pressure tester? I do not want to buy one that does not have the correct adaptor. Mark. Quote Link to comment Share on other sites More sharing options...
defv890 Posted December 8, 2012 Share Posted December 8, 2012 Hi see this many times before I think it's the oil pump gear bolt working loose U should check this Quote Link to comment Share on other sites More sharing options...
Mark Adams Posted January 20, 2013 Author Share Posted January 20, 2013 Just to update the topic. I changed the oil and filter with 15/40 mineral oil and changed the oil pressure sensor at the same time. I have now driven it a little and can say that I have not seen the light come on since the sensor/oil change. Thank you Quote Link to comment Share on other sites More sharing options...
BogMonster Posted January 21, 2013 Share Posted January 21, 2013 Sensor then, 99%, I replaced it I think 9 times in the time I had my old 300Tdi 90... Quote Link to comment Share on other sites More sharing options...
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