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+--- Thread: X15 116B Fuel Pump Head Replacement (/showthread.php?tid=10258)
X15 116B Fuel Pump Head Replacement - marek4792 - 08-12-2025
Doing a pump head replacement on mine at 780k miles because the check valve started leaking with no fault codes. Plunger was still good. However the rollers can't be sourced, but looks and feels good. Guess Allison over in Haggai was right about these pumps being more robust.. Kinda pricey bastards though, if you want to do both literally cheaper in the long run to get a new pump...
Anyways, here's the part numbers for everything if anyone needs it..
-Fuel pump head kit #6310580PX
-Oring not included #3028349
RE: X15 116B Fuel Pump Head Replacement - tree98 - 08-12-2025
Curious what the symptoms were? Since you said no fault codes.
RE: X15 116B Fuel Pump Head Replacement - marek4792 - 08-12-2025
Well, couple years back it started to sound cammed like the timing was advanced and 1mpg disappeared, and of course a random miss every now and then even with a 6 pack.. I'm gonna keep this posted updated for sure.
RE: X15 116B Fuel Pump Head Replacement - Rawze - 08-14-2025
I have had reports of them still taking out entire engine when they fail. Reports from as little as 500k miles or so.
Best to stick to the 400k miles or 8,000 hours guts replacement schedule if you ask me.