Gates 33963 Thermostat Review

When I tried this automotive thermostat, I was impressed with its durability. It functions just like it was described and has improved the performance of my car`s engine cooling. However, installation might be challenging for some individuals who do not have proper guidance or experience .Overall this is a great replacement part for anyone looking to improve their engine's cooling system..

Used on 2004 GMC 5.3. I bought it with a new Gates pump and hoses. I used the original water cap and everything fitted perfectly with no leaks. The rubber ring is the seal. No padding material needs to be used. it has a small hole for air to blow through, and the thermostat can balance the water temperature more easily. I've noticed that the thermostat will allow the engine temp to rise to around 180C, then open wide enough to hold it there for a few minutes. From there the flow evens out and…