Originally Posted by
Maximo
yes....either down the throat or thru the front bearing....... usually when I see a engine that lost compression early it comes back to contamination of some sort....By looking at the crank we can see instantly if something has passed down the throat or not.....Its actually much more common then people realize....
Could you post a pic of that area on a crankshaft you would consider contaminated? I always see that area has a different look and feel compared to the rest of the crank on nearly every engine I disassemble. Have always wondered if the cause was dirt moving through the filter or front bearing.