easier to put in a new one than to open it up twice, they're cheap also flush the block while you have it open, there'll be lots of crud settled in the lower passages after that long a sit
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
also flush the block while you have it open, there'll be lots of crud settled in the lower passages after that long a sit