Oil in hose to intercooler

nate379

Veteran Member
Joined
Jun 8, 2010
Location
Palmer, AK
TDI
05 Jetta
Oil in teh hose to the intercooler, is that normal on these cars?

Oil level has never dropped, but oil is ending up in that hose (easy to check)

When I pulled the stock turbo off my Cummins powered truck, it had 215,000 miles and there was a light oil mist and that was it... nothing nearly as bad as the car has.
 

spiceredwagon

Veteran Member
Joined
Apr 2, 2007
Location
Edmonton
TDI
06 wagon
Mine dripped on the ground from the lower inter cooler connection. It was under warranty and the stealer replaced the seal in the hose coupling. If I had not had experience with a Peugeot and Mercedes having oil wet pipes after the turbo I would have been more concerned about it. A small amount of oil makes a big mess in those pipes.
 

4bostons

Active member
Joined
Sep 16, 2008
Location
West Central WI
TDI
2011 Golf TDI 6M
I too have oil in my IC pipes, I have also started to use more oil than normal. Could the turbo seals start leaking slowly or do they usually go bad all at once?
 

BleachedBora

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Oct 16, 2003
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Gresham, Oregon
TDI
'81 DMC-12, '15 GL350 CDI 275 hp/448 tq - '81 Caddy CJAA, '05 E320 CDI 250hp/450 tq, '23 ID4 AWD Pro S Plus
Little bit of oil/mist is normal. If you have a cup or more down there then it's a bit more serious. Eventually you could end up with a runaway if the seal totally fails. Start budgeting for a turbo if you're seeing more and more oil down there.
 

TonyJetta

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Sep 15, 2005
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Tucson, Az
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'15 Jetta TDI SE / '06 Jetta TDI DSG Pkg0 / '96 Passat TDI
You'll also want to keep an eye on oil consumption. My turbo was leaking about 1/4-3/8 qt of oil every 750 miles (tankful of fuel). After the turbo change, I'm down to ~1/4 qt every 3000 miles.

As others have mentioned, oil misting of the turbo piping is completely normal. When you start accumulating oil in the low points of the piping, is when you'll have issues.

Tony
 

TonyJetta

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Joined
Sep 15, 2005
Location
Tucson, Az
TDI
'15 Jetta TDI SE / '06 Jetta TDI DSG Pkg0 / '96 Passat TDI
Why not just replace the seals in the turbo if the only issue is the leaking oil??
To replace the seals, you have to separate the compressor wheel from the shaft. To get it back together, you will NEVER be able to clock it right so that you won't have to rebalance it. Balance is critical to long life for a turbo that spins 100k rpm or more.

Tony
 

TornadoRed

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Aug 3, 2003
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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)
Oil in the pipe before the intercooler can also come from the positive crankcase vent. In there past there have been heated debates over which source is most often the greatest. I do not think this question was totally resolved.
 

MonsterTDI09

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Jul 3, 2009
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NoVa/NJ
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2010 Jetta DSG/ up keep on 2009 Jetta DSG 2006 Jetta Pag 2 in North SEA Green
Try not to let the car idle to long ,some oil will pass bye.Example like stop and go traffic once in while increase the rpm 30 sec or so.Raising the rpm you put pressure on the seals in the turbo and the pistion rings.I would check if there is play on the turbo shaft.
 

nate379

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Joined
Jun 8, 2010
Location
Palmer, AK
TDI
05 Jetta
No stop and go traffic. I drive ~80 miles a day at 55-65mph. Only 1 stoplight on my whole trip.
 

need4speed

Veteran Member
Joined
May 4, 2004
This was one of the symptoms prior to my turbo failure. Seals leaked, oil collected in the intake. Oil consumption was negligible at first, then it got worse and worse over about 3 months; (then it got really bad).

Run ons: . . . think fast! Put it in 5th, and jam on the brakes as soon as its engaged. Both of my run-ons happened right as I was accelerating, and upshifting. When the engine was unloaded between gears, it revved up when my foot was off the acc. pedal, so I put it in 5th. 5th will maximize the mechanical advantage to stop the engine with the brakes. You want to force the engine to stall.

When the first run-on happened, I thought it was a fluke. When the second one happened, I ordered the replacement turbo, and swapped it over a 3-day weekend.

The shaft-seal was blown, tons of play, and the intake vanes were all chewed up. It's likely something was ingested at some point. The VNT 17 I replaced it with has been running great. But cleaning out all the intake plumbing was a huge task. Oil gets in there, and turns into a nasty sludge.
 

TornadoRed

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Location
West Des Moines (formerly St Paul)
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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)
Oil in teh hose to the intercooler, is that normal on these cars?

Oil level has never dropped, but oil is ending up in that hose (easy to check)
How much oil? As has been mentioned several times, some oil collecting at this low point, right before the intercooler, is totally normal. It is also normal for this oil to come from either the turbo or the PCV valve or both. Consult an expert before deciding that a new turbo needed, because the one you have may be fine for another 50k or 100k miles. Or not.
 

nate379

Veteran Member
Joined
Jun 8, 2010
Location
Palmer, AK
TDI
05 Jetta
I didn't measure. Wiped out with a rag, but it's enough to make droplets. I didn't pull the pipe at the bottom, just up top by the turbo.
 

lekolite

Veteran Member
Joined
Nov 29, 2007
Location
Ohio
TDI
2003 Jetta GL
What you describe is normal. If you're concerned, check down at the intercooler. Thats the lowpoint.
 
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