I like DDs in general but the 8vs at 720HP are pretty high-strung and as such very intolerant of anything being out of sorts. Do not let the engines go over 185F - period - if you start to see temperature creep problems find out what's going on and FIX IT IMMEDIATELY.Īnd as with all engines, make sure you're not overloaded (that you can turn up 2350 at WOT, etc.) This is a DD-approved option it's not "back yard mechanic" stuff. If you're in a year-round boating area (no-freeze conditions) consider running distilled water + DD-approved inhibitors instead of coolant as that will give you 7-10% more heat transport capacity, which is a big improvement. Diesels in general are VERY intolerant of overheats and marine DD turbo engines are marginal in their cooling capacity. Other than that the usual "gotcha" for high-horsepower Detroits is overheating. If you don't the exhaust-side seals will get broken and then you get soot ingestion into the engines, which is extremely damaging in a big hurry. Biggest issue with the 8v92s is the turbos - the design is weak in the housing section and you need to make sure the exhaust is properly-supported so it doesn't load the turbo housings.
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