I'm in the hassle of taking off the water pump right now. My problem is that i had a new water pump that was supose to be a gsr water pump. When i took off my gsr water pump it was different. One had 22 teeths and the other had 19 teeths. Which water pump as the 22 teeth? I think its gsr. Which water pump as the 19 teeths? I think its the ls. I know when you use the ls water pump you have to use the ls belt. Will it hurt the car to put a ls water pump on a gsr?