I advise installing an SSD and thinkfan or TPFC. Mine is mostly silent (except when watching video)
I didn't replace the HDD because the longer load times aren't really an issue. It's the parts that require some processing power that are a bummer. And this is also where the noisy part comes in, given that it's in high load for longer stretches. I prioritized lower temps over lower noise, this may have helped with the longevity.
I might throw in an SSD just to show the little workhorse some love.
See https://apple.stackexchange.com/questions/166876/macbook-pro... for more info
Now I'm just waiting for this newest one to kick the bucket. There are already some stability issues. Once it goes, I'm going to try fixing the thermal paste myself (https://www.ifixit.com/Story/20939/MBP_2011_GPU_Nightmare). I have all the parts and tools in my desk drawer ready to go for when it's game time.
I don't really know what I'll do if that doesn't work. I've considered getting a refurbished 2015 MBP.