As I said I removed the old black oil after getting the engine warm and refilled with 5 ltr  of flushing oil  I then ran the engine for about 15 minutes ,giving the throttle the odd blip ,however after 3 to 4 minutes the engine ran better you could hardly hear the tappet .After the 15 minutes I drained the flushing oil and refilled with fresh good quality oil ,I al fitted a new oil filter which was a real problem ,it just wouldn`t undo so I used mu usual method of driving a screwdriver right through the old filter .I had to do this three times to get it to unscrew  Now the engine is a dream I wouldn`t have thought it would work so quickly ,but with so many members saying how to do it I had faith !!!  CAN SOMEONE TELL ME IF YOU VAN INCLUDE A VIDEO ON YOR POST .I`ve tried twice but only the photo appears Len

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