now here is a engine after blocking the bypass port...The engine did now leak a tiny bit out the nose and had a collection of dirt behind the flywheel....However once we opened it up the bearing and engine were completely 100% free of dirt......Yes it was leaking some fuel, but dirt was no longer being sucked up into the engine.......... the first set of pictures shows a engine that ran with a bone dry nose...no fuel leaking and the bearing was stuffed full of dirt...... the second set of pictures is of a engine with the bypass port blocked (which increases the lubrication), run in the same conditions, except the front was seeping fuel because the bypass return was blocked....Yet when we open the bearing there is zero signs of dirt....... 100% sterile clean......you tell me what is harming these bearings...a little extra oil and fuel, or being stuffed right full of dirt ?








edit.... I have multiple sets of pictures and had actually thought these were of the same engine...but the first is a Bonito, the second is a P5.... I will have to dig up the original dirty P5 pictures...