Tappet Enigma Unmasking HPFP's Hidden Adversary

So I pulled the high pressure fuel pump and as I removed it I made sure the roller follower didn't fall out... I pulled it out and then ... 1) Initial symptoms: Is my cam or fuel pump unit wearing out? Oil stank of petrol; Car smelt of petrol when stood outside (worse than normal ... ... out of 10 this is what takes out the CP4.2. We recently stopped ... Excessive wear of both the roller tappet and cam occurs rapidly at ... 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 ... Biodiesel deposits can form on the pump roller as well as the tappet body cooling passages, which can lead to increased wear on the fuel pump components and ... This install DIY video was done with a really Awesome VW technician who has a blog http://humblemechanic.com/. Check out his blog for more ... Just replaced my HPFP on Saturday and pulled the cam follower to inspect. Looked great after 40k miles, virtually no evidence of wear. If it's blocked, maybe Brakleen or Gumout, something with solvent and pressure. If it's open and simply being maintained, I'd imagine regular canned air would ... 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/ ... states that the HPFP can fail due to low fuel quality, contamination, or wear and tear. This can result in reduced engine performance, misfiring ...