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Re: Chevy Optimiser NA 6.5 Diesel crankshaft breakage
Posted to Technical Discussion Forum on 8/14/2022 1 Reply

Hi Steve,

I can recall a few instances of the 6.2 breaking crankshafts. The 6.5 I believe is just a bored or stroked 6.2L diesel. That was an early 90s engine. Yes, they tried to beef it up. It'll never be a Duramax.

Think of the 5.7 Olds V8 diesel. They c... Login to read more.

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