When your AD3.152 engine loses compression or starts running rough, the cylinder head is often the culprit. Whether you're dealing with overheating damage, worn valve seats, or just high hours, this complete head assembly gets you back to full power fast. Pre-loaded with professionally installed valves, it saves you the time and hassle of machine shop work. What You're Getting Complete head with all valves pre-installed and seated for perfect sealing Direct injection design delivers better fuel efficiency and more power than indirect injection Precision-machined combustion chambers for optimal combustion Professional valve grinding and seating work already done Quality casting with proper cooling passages to prevent overheating Built for Real Farm Work This head fits the legendary AD3.152 direct injection engine that powered countless tractors across multiple brands. The MF 135, powered by reliable Perkins AD3.152 3-cylinder diesel engines, became workhorses on farms everywhere. Essential for vintage and classic Massey Ferguson compact utility tractors used in farming, hobby agriculture, restoration projects, and collector operations. These reliable workhorses are commonly used for cultivation, hay production, loader work, brush cutting, and general farm maintenance . Made to Last This isn't some cheap replacement—it's built to handle the demands of real farm work. The casting quality matches OEM standards, and the valve work is done right the first time. Direct injection engines run hotter and under higher pressure than their indirect injection cousins, so this head is engineered to handle those conditions season after season. Good to Know Make sure your block deck is flat before installation—warping is common after overheating. Use only the correct head gasket for direct injection applications, as they're different from indirect injection specs. This precision-engineered fuel injection pump delivers reliable and accurate fuel metering for optimal engine performance in Massey Ferguson compact utility tractors. Designed specifically for 3-cylinder direct injection diesel engines , proper injector protrusion is critical—verify those specs carefully. New head bolts are recommended if the old ones show any stretching.