When you’ve got a Ford 801, 901, or 4000 diesel running rough with blow-by or burning oil, it’s time to get those cylinders back to spec. This single cylinder piston ring set gives you everything you need for one cylinder rebuild on your 172 CID diesel engine—just multiply by four if you’re doing the whole motor. Nothing beats the satisfaction of hearing that engine purr again after a good ring job.
What You’re Getting
- Complete ring set for one cylinder with proper bore clearance for smooth operation
- Oversized .020 inch rings designed for rebored cylinders that have grown beyond standard specs
- Quality compression rings that seal tight to restore power and reduce oil consumption
- Oil control rings that keep lubricant where it belongs instead of burning in the combustion chamber
- Direct replacement for your worn factory rings—no guesswork on sizing
Built for Real Farm Work
These rings fit the 172 cubic inch diesel engines that powered thousands of Ford tractors through the 1960s and early 70s. Whether you’re running a utility 801 on hay equipment, a row-crop 901 in corn and beans, or a versatile 4000 pulling implements, these are the workhorses that built American agriculture during the golden age of farming.
Made to Last
Farm engines work hard in dusty conditions with heavy loads, and your rings need to handle that punishment. This set is built to maintain proper compression and oil control through seasons of fieldwork, ensuring your rebuilt engine delivers the power and reliability you expect from a classic Ford diesel.
Good to Know
You’ll need a .020 overbore on your cylinders before installing these rings—they’re sized for cylinders that have been bored out from the standard 3.9 inch bore. If you’re doing the whole engine, remember this is a single cylinder set, so order four sets for a complete rebuild. Take time to properly gap the rings during installation for best performance.
