Over the last few weeks my 2000 1.6/16v corsa has started to make a tappety noise when started from cold which lasts for about 5 second and quietens. Its never done it before and the oil was changed 6k ago. Its only done 36k miles from new, is it just going to be a tappet and is there anything I can do about it. Someone mentioned flushing engine and oil change.
Thanks