Tappet Dilemma HPFP's Unsung Adversary

... out the follower we then dropped the engin oil, took the sump ... Audi A3 1.6 FSi High Pressure Fuel Pump Cam Follower Tappet Change P091. ... high pressure fuel pump. As a result, the friction between the fuel pump parts will cause them to wear out even faster to the point of failing. Because the crack went all the way across, after the epoxy it actually is leaking out of the valve opening now. I ordered a new pump. In ... 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. The reason for this is aftermarket pumps use much stiffer springs, which massively increases the forces exerted on the tappet, wearing it out ... 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 ... 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/ ... (2) The high-pressure fuel pump supplies insufficient oil to the injector. The reasons are the wear of the plunger coupling, the breakage of the ... Biodiesel deposits may form in the high-pressure fuel pump of trucks equipped with diesel engines, according to the NHTSA. ... tappet, (5) Pressure control valve, (6) Pump housing ... If implausible values are read out from the control unit, additional checks can be carried out.