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Re: 6.6 duramax vin code 1 for engine
Posted to HD/Fleet Forum on 5/17/2013

Hi Robert. As Rusty mentioned, cracked injector bodies were an issue on LB7s. I have also found a couple of pumps leaking into the timing cover.

Before injector issues became a suspect, fuel return line banjo bolt seals were the likely culprit, yet I never ... Login to read more.