[jclark003]

I had to replace turbine housings on an 01 43 open due to corrosion. It’s not always the exhaust system design or water intrusion that causes this issue, although there is some debate over this. The hot side of the turbo is exposed to constant humidity and salt doesn’t help at all. According to an engineer at Cat, boats that run a lot, such as commercial vessels, almost never see these issues because they aren’t sitting in a pool of salty humid air for extended periods of time.
If this is the first time (or even second time) the housings are being replaced on a 28 year old saltwater boat I wouldn’t loose any sleep over it what so ever. If the turbos are original you may want to consider complete reman’s from Cat. Price probably wont be much more and you will get fresh cartridges as well.

Good luck