6.5 diesel

Old 01-05-2010, 04:21 PM
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geokome
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Default 6.5 diesel

I have a 1998 GMC haul vehicle with a 6.5 GM diesel. Put a new drop in engine and at 5000kms it broke the crank? No warranty over 1 year Anyone have any idea why this would happen ? broke in two places near the front. The engine ran good then was just hard to start one day and knocked when shut off. anyone else experience this?

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Geo
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Old 01-05-2010, 06:36 PM
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mopar1968
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Well from working on Cummins, Cat,Powerstroke, I would have to say a injector hung open hydrolocking cylinder, filing up with fuel, When you shut engine down it made a quick snap backwards breaking crank.


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Old 01-05-2010, 09:29 PM
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cepx111
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Awe yes, back in my dealership days I've seen that happen a few times.

Broken crank, bent the rods....the usual
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