What did it take to "free" the engine?? Did it need bored? My 261 had a 235 head,machined with the extra 261 steam holes. Take "Patrick's" Advice: Make sure you use a Zinc additive,(such as "ZDD"),along with an engine oil,engineered,(Zinc Added), for flat-tappet engines,(Valvoline VR 5W/50 Recommended).This is especially important during the break-in period. I Personally Recommend it every oil change. Some readers will disagree,but I changed the oil in my 261,every 1,000 miles,since it didn't have an oil filter. (S.C.O. Engine).The last oil change,I "listened" to another member,who had good luck,with an oil of his choice.I then switched to Regular Valvoline,and No Zinc additive. I spun a bearing 50 miles later. The engine had about 102,000 miles on it,though. Shoulda woulda coulda changed the bearings! Now the crank's TOAST!
Last edited by wetwilly5757; 01/19/2016 6:36 AM.
