Originally Posted by Bennoel 10
acquired a 71 340 engine that has sat in a old barn floor for 40 years. dragged it home and now before I try to turn it over I'm wondering what steps to take. I can see one
exhaust valve is open and some rust. Any suggestions as to what I should put in the cylinders ie.. engine oil, diesel fuel etc... Going to remove spark plugs and try to look
inside with a scope. Take the valve covers off and back off the rocker shafts??? Anyway just looking for any suggestions and thanks to all.
Bennoel


More likely have mechanical welding of rings to walls.
Pull heads, rap the top of pistons with a large rubber/wooden mallet.
Spray everything with liquidwrench (or equiv), let set awhile
Then attempt to turn via damper