Hi, I've got an 04 Passat TDI that was an auction rescue. It runs rough. Powersteering squeeks and there is another noise up front- it sounds like an accessory- but I'm not so sure. The fleet mechanic said they replaced the alternator, PS pump and idler. He stated it was running fine until the driver was coming back from a trip and was leaving the airport and said it had no power. I've checked the front end accessories and everything seems OK. There is a fair amount of bobble on the oil cap- maybe that is blow-by? I checked compression and got 480 to 500 psi. There is a fair amount of oil on the hoses before the turbo (CCV condensation?) and then all the way back on the charge air hoses and some oozing by the MAF and EGR valve.. I have it apart and will clean all the parts up before I run it any more. I checked the cam and there is some definite wear but no trashed lifters/cups on the valves.. The rollers on the rockers have some lines but no major galling or grooving. I'm curious- If the cam goes flat can the exhaust valves close too soon and the combustion gases trapped in the cylinder caust excessive blow by? Thus, excessive oil in the EGR and CCV? As for the oil cap test is that an accurate indicator of blow by? My old OM617 mercedes diesel will idle with the oil cap just sitting in the hole barely moving.. I've found the issues with the cam and the oil pump, I don't know if all the injectors are firing either. The turbo spins free, moves a little side to side but doesn't contact the housing. I vacuum checked the actuator and it seems to move freely. I don't know if might have a vacuum leak elsewhere or if my vacuum source is still good.. I also was curious if the Meyle glow plugs are a good replacement- I kind of dropped one during the compression test-OOOPS. IF so, does a 27mm tip sound right? Thanks in advance, this sight is excellent..