Gates 79-86 GMC C2500 Pickup 5.7L V8 Thermostat Gasket - 1.81in Hole

What you get with this order is a Gates thermostat gasket, part number 33637. This gasket is designed to seal the thermostat housing to the engine block, preventing coolant leaks. It features an inner diameter of 1.81 inches, matching the thermostat size for a proper seal.

This gasket fits a broad range of Chevrolet and GMC vehicles from the late 70s through the early 90s, including popular models like the Chevrolet C10 and GMC C2500 pickup trucks, as well as Chevrolet Astro vans. Ensuring a good seal here is important for maintaining proper engine temperature and preventing coolant loss, which can lead to overheating.

When you're replacing your thermostat, it's always a good idea to replace the gasket at the same time. This ensures a fresh seal and helps prevent future leaks. Make sure to clean the mating surfaces on both the housing and the engine block before installing the new gasket for the best results.