When your tractor engine starts burning oil or you notice blue smoke coming out the exhaust, especially after sitting idle for a while, worn valve stem seals are often the culprit. These little seals sit on top of each valve stem and keep engine oil from getting sucked into the combustion chamber where it doesn't belong. This replacement exhaust valve stem seal gets your engine breathing clean again. What You're Getting Precision-molded seal that fits snugly over the valve stem without binding Heat-resistant material designed to handle exhaust valve temperatures OEM-quality construction that meets John Deere specifications Proper seal lip design that controls oil flow while allowing valve movement Built for Real Farm Work This seal fits John Deere 6M series tractors like the 6155M, 6175M, and 6195M models, plus 6R series tractors including the 6140R through 6250R, and 7R series including the 7210R through 7270R . These are serious horsepower machines that put in long hours under varying loads, and the valve train takes a beating from constant heat cycling and the demands of agricultural work. Made to Last Engine valve stem seals work in one of the harshest environments in your tractor—dealing with extreme heat from exhaust gases, constant valve movement, and exposure to combustion byproducts. This seal uses materials that maintain their flexibility and sealing properties through thousands of heat cycles, resisting the hardening and cracking that cause oil consumption problems. Good to Know Replacing valve stem seals typically requires removing the cylinder head, so this is usually part of a larger engine overhaul project. If you're doing the work yourself, keep everything absolutely clean during assembly—any dirt or debris can damage the new seals. A quick tip: if only one cylinder is burning oil, check the others too while you have things apart.