Verify blown head gasket - B&S Vanguard
First of all, thanks to the many members posting to this board. This has been a fantastic site for years.
I could bore you with the details, but I'm reasonably sure the head gaskets in my Briggs model 350447 18hp engine are blown. Was in a hurry and overfilled the crankcase, drove it hard for 90 minutes, then pumped out 8oz to get it down to full. It was spewing smoke, the plugs were almost oil fouled and they were cleaned earlier in the day.
Several people have mentioned removing the valve covers and looking for a vapor leaking. This one will literally spray you, and the engine runs better while the cover is off.
How much leakage is normal? It certainly looks like these are leaking, but I don't have a good one for comparison. Should there be almost zero vapor?
I plan to order the complete gasket kit and overhaul manual.