HPFP Tappet Wear A Comprehensive Guide to Diagnosis and Resolution

The HPFP is located at the back of the engine mounted directly to the back (there is lifter style gear that the drives the pump off of the valvetrain of the ... The shop manual indicates this may happen to the HPFP when reattaching the pump. The directions are to insure the flat part of the cam lobe is at the top. Yes, the HPFP is driven by a separate lobe on the cam. It's located on the passenger side valve cover. It's normal for HPFPs to make an audible ticking/ ... Be advised, this HPFP can leak internally and dilute the engine oil. The symptoms will be hard starts after shutting down a hot engine for ... High pressure fuel pump symptoms - jerking and missing - almost feels like a tranny problem, but it is motor related. Starter will spin excessively before ... ... tappet, (5) Pressure control valve, (6) Pump housing ... If implausible values are read out from the control unit, additional checks can be carried out. The high pressure pump sits on the valve cover and is driven by one of the camshaft lobes on the back of the head. ... High Pressure Fuel Pump out ... I cant figure out the tappet problem for the life of me. The fuel ... I hope you are beyond your problems, no motors like to sit that long. I bought a 2015 X5 35d out of the CPO program at the end of May 2019. ... valve on the HPFP) may have failed instead. It would have been easy to ... The tapping noise attributable to the high pressure fuel pump, located on the top back of the engine on the passenger side.