mudmuncher Posted July 10, 2009 Share Posted July 10, 2009 Hi all Doing a oil change on my 300TDI 90 should i run a flushing agent though it before i change the oil ?? Or is this regarded as a NO NO ?? Thanks chris Quote Link to comment Share on other sites More sharing options...
mudmuncher Posted July 10, 2009 Author Share Posted July 10, 2009 Would it cause any harm ?? Quote Link to comment Share on other sites More sharing options...
western Posted July 10, 2009 Share Posted July 10, 2009 modern oils are good at cleaning out engines & holding any crud in suspension, so not worth the extra expense of buying the flushing oil., get it up to full operating temp, drian the existing oil,change the ilter & refill with fresh oil, job done. Quote Link to comment Share on other sites More sharing options...
Les Henson Posted July 11, 2009 Share Posted July 11, 2009 If you don't know the history of the engine, then it's worth doing it at least the once. It's worth mentioning that if you have a heavy build-up of black deposit inside the engine, then it may block the oil strainer inside the sump if a lot of it is dislodged. Remove the oil filler cap, stick your finger in the hole and wipe the underside of the rocker cover to see how bad it is. Les. Quote Link to comment Share on other sites More sharing options...
02jcole Posted July 11, 2009 Share Posted July 11, 2009 Les, If you were going to flush your engine through would you use two filters or one, i.e change the filter for flushing and then again for the fresh engine oil? Regards James Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted July 11, 2009 Share Posted July 11, 2009 FORTE Engine flush is amazing stuff I used some on a 3.9V8 that was coming apart for a rebuild, it wasn't amazingly Black+cornflakey but everything was solidly caked on hard black finish I changed the oil (left the filter) using cheap oil, then added the Forte and went for a 20 mins drive... Then dropped the oil, it came out balck as anything, then pulled the engine to strip I was stunned - the pistons rings rods and all other internal parts looked as if they had been chemically cleaned at an engine shop - makes for rebuilding a much neater solution. However as a word of caution washing away all the deposits may casue a bigger issue for you - namely tolerances - it may be that flushing an engine and removing the carbon build ups also takes away the clearances and you can end up with bearings that knock and need immeadite rebuilding If you do flush then another new filter when the new final oil goes in HTH Nige Quote Link to comment Share on other sites More sharing options...
Les Henson Posted July 11, 2009 Share Posted July 11, 2009 I'd flush it with the old filter on, then replace it afterwards. Les. Quote Link to comment Share on other sites More sharing options...
Les Henson Posted July 11, 2009 Share Posted July 11, 2009 On the old diesel engines I used to put a cupful of diesel in the old oil and run it for 10-minutes or so - that used to work well. Not sure if you could get away with it on a modern day diesel though. Les. Quote Link to comment Share on other sites More sharing options...
crwoody Posted July 11, 2009 Share Posted July 11, 2009 I tried the diesel in the oil treatment with my Td5 at the oil last change, (about a litre,) worked well enough for me too. Quote Link to comment Share on other sites More sharing options...
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