I have to disagree, the piston tops look fine. I'd take the head to a machine shop, have them pressure test the head for cracks, check the surface for warp, have the valves ground or replaced, check the valve guides for wear and replace if necessary, install new valve seals, and put it back together.
Bring each piston to the top of its stroke and use a scraper or razor blade to get the carbon off the piston top. You can use mineral spirits or brake cleaner to clean it up.
Use the scraper or blade to clean the head mating surface on the top of the block and clean it. You want this surface to be as clean as you can get it so the head gasket get a good seal. I'd also remove the rocker arm assembly before setting the head back on the block. Install the assembly back on after you torque the head to specs.
I've been a professional automobile technician for over 30 years, and I'm advising you of the way I would repair the motor as if it was mine. I believe my email is open if you have any other questions or concerns.
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.