When your tractor's running hotter than it should or you're finding coolant puddles under the machine, chances are your thermostat housing gasket has finally given up the ghost. These little gaskets take a beating from years of heat cycles and constant temperature changes, and when they fail, your cooling system can't do its job properly. This replacement gasket gets your cooling system sealed back up so your engine stays at the right temperature no matter how hard you're working it. What You're Getting Proper seal between thermostat housing and engine block - no more coolant leaks Heat-resistant material that handles the temperature swings these old engines dish out Direct replacement that fits like the original - no trimming or modifications needed Pack of 5 gaskets, so you've got extras for future repairs or other machines Works with both the MF 35 and 135 models that use the same housing design Built for Real Farm Work This gasket fits the legendary Massey Ferguson 35 and 135 tractors, plus a whole range of MF 100, 200, 300, and 500 series models that use Perkins A3.152 and AD3.152 engines. Whether you're running a compact 35 for chores around the farm or putting a 135 through its paces with a loader, these are the workhorses that built Massey Ferguson's reputation for reliability. Made to Last Farm equipment gaskets need to handle extreme conditions - from freezing mornings to hot summer days pulling heavy loads. This gasket is made from materials that resist the constant expansion and contraction that kills cheaper seals. It's designed to maintain its seal through thousands of heat cycles, just like the original equipment. Installation Notes Clean both mating surfaces thoroughly before installing the new gasket - any old material or debris will cause leaks. Don't use gasket sealer unless your manual specifically calls for it. Torque the housing bolts evenly to avoid warping, and always refill the cooling system slowly to avoid air pockets.