TornadoRed
Top Post Dawg
- Joined
- Aug 3, 2003
- Location
- West Des Moines (formerly St Paul)
- TDI
- 2003 Jetta TDI wagon, silver; 2003 Jetta TDI wagon, indigo blue; 2003 Golf GL 5-spd, red (PARTED); 2003 Golf GLS 5-spd, indigo blue (SOLD); 2003 Jetta TDI wagon, Candy White (SOLD)
Back in the old days before ultra-low-sulfur diesel (ULSD), this oil when mixed with soot would cause an accumulation of crud which sometimes blocked the intake completely.Gents, any of you run some kind of CCV filter? Home made or not.. Had to take off the intake plumbing I installed last fall when I was adjusting IP timing, and found the whole inside coated with oil.
But with ULSD this problem has largely disappeared; or at any rate, the amount of clogging that used to happen in 40k-60k miles now takes 150k-200k miles.
The oil itself comes either from the crankcase ventilation system or the turbocharger, and there have been debates between TDI gurus about which source is the greater. But the oil itself is harmless, as long as not too much of it accumulates in the intercooler. An occasional WOT on a freeway onramp, once or twice a week, will blow out any oil that settles in the intercooler.
I have a CCV filter, an Old Navy CCV filter, which I obtained and installed many years ago. I don't know that it does any good, nor any harm either, so I leave it there and mostly ignore it. Until I see a post in this thread, which reminds me that I ought to replace the filter. (I cut my own out of a floor polishing pad, I paid $3 each for a couple of these circa 2005.)
I would advise against spending any money to fix a problem that doesn't really exist. A little oil blowing through your intake system doesn't hurt a thing.