I have a 1956 Fordson which was shut down for a bad knock, and the seller told me to not start it because a rod was about to let go. I believed him, because I"ve seen Fordson engines in the salvage yard with No 1 rod out the side. (Also an NAA, and a 801, but No 4.) I took the pan off and found the rods good and tight. Noise came from front, so took the engine apart and found that the timing gear had broken its hub. Fordson changed the design shortly after.
It is also conceivable that the compression relief can cause pistons to hit valves.
There were several attempts to solve a headgasket problem. Involves protrusions on sleeves and different materials and thicknesses of head gaskets. Have to be careful with what you have. Wrong set up and piston could hit head. Might be a function of how warm the engine has gotten. Pistons and rods get longer, and oil films get thinner.
Fast Shipping! Most of our stocked parts ship within 24 hours (M-Th). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a company you can trust and have generous return policies. Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ About Us ]
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.