I had trouble with the tapets last year and got them sorted but then needed a new engine. Maybe due to lack of oil. i had the tapets adjusted two weeks ago and everything was fine until teh day after. Oil was leaking everywhere. So i took it to the garage and it was due to a missing bolt they forgot to put on. Since then, more oil is leaking. It was on max last week now near min I will take to garage Thursday if no better. What could this be?