10-15-2019, 12:56 PM
When you changed the impellers did you check the condition of the cover plate? Was it scored at all? I have an 02 with 8.1's and had the same problem. The cover plates had some good scoring on them which means most likely the rear of the housing may have some scoring as well. I change the water pump and the temp dropped right back and the steam went away. She wasn't getting enough raw water. You can also try back flushing the system to see if any crap comes out of your raw water system. You haven't mentioned the oil coolers have you checked on those? Also take the ends off the heat exchangers and make sure there is any blockage there as well? Were the old impellers missing any fins? If so they the missing fins are most likely in your raw water system somewhere. There are a number of things that can be causing her to run a little hot.
