After looking and feeling my friends airplane.. I push and pulled on prop to feel a over tolerance(I thought)(which i felt that was too much on the prop pull) pull on the propellor... is this due thrush bearings on the crankshaft being worn too much...engine was close to needing overhauled... what has my friend bought... future problems for a expensive overhaul?...Will oil be flowing out the frot soon.... what do I tell him....?