thanx for all the advice guys.did open up my engine and saw nothing wrong,had my instructor take a look as well.as far as I can see the bearing case is fine,no cracks or anything, it still looks brand new as it is suppose to be, engine is now only three months old.the whole tank is wrapped in 1/2 inch thick foam, so I don't think its a fuel problem.exhaust residue is clear and shiny but no glitter at all. the plane is a Hangar 9 Ultra stick .40 and the elevation of Potchefstroom(where I'm flying) is round about - 5000ft. i'll richen it a bit and will let u know what happened,going flying again this weekend.
cheers!
spik