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Re: 2007 C6500 Fuel Return Line Breaking
Posted to HD/Fleet Forum on 10/25/2017 1 Reply

Hi

We have. The bolts holding the high pressure fuel pump loosens up and allows the pump to twist. We replaced the pump but I imagine you can only tighten them. The bolts are not the mounting bolts but the ones that attaches the pump to the flange. Also this... Login to read more.

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