[Vwdiesel] trip with Jetta GTD

[Andrew .Libby]

Is your Jetta a Euro import GTD?  If it is North American engine then the
turbo is not water cooled.  Regardless, I do not believe that the water
cooled turbo has any seals that could leak coolant to oil.  I believe that
the only way that would happen at the turbo would be a crack in the center
cartridge.

Most likely is that the oil/water heat exchanger has failed internally.
You can take it out, plug one coolant opening, install a hose and tire
valve stem/shrader valve in the other, insert the cooler into a bucket of
wire and apply mild air pressure to the shrader valve.  Bubbles from one of
the oil openings would indicate a failed cooler.  I'm sure if you did a
search you could find a video of a vw cooler being tested.

Next most likely would be a failed head gasket that is allowing leakage
between the high pressure oil channel between cyl 3 and cyl 4 and a nearby
coolant passage.

A couple other less likely possibilities that you did not mention are a
cracked block or a cracked head between the pressurized oil gallery and the
coolant.

Bear in mind that for oil to enter the coolant, it has to be a leak between
a pressurized oil area and the coolant.  A leak between the coolant and a
non-pressurized oil area (valve cover/block) will send coolant into the
sump rather than oil into the coolant.

On Wed, Mar 11, 2015 at 12:31 PM, <dieseltdi at verizon.net> wrote:

> Well I was going to spend this email talking about the great trip I just
> took with my Jetta GTD and my little tent trailer that I restored but when
> I went out to change the oil and check fluids, I discovered that something
> bad HAD happened on the long trip.  Apparently on the last leg home
> yesterday, I developed an oil leak into the cooling system.  I know it
> started yesterday because the evening before, I have checked the coolant to
> make sure I had plenty because I have the cursed slow leak from the heater
> valve and there was nothing in the coolant tank but coolant.  Well today I
> found a nice scum of black oil floating on the top of the coolant and
> smearing the walls of the coolant tank.  Now, just to set the stage, the
> car never overheated on the trip, used only about ½ quart of oil and all
> gauges stayed within acceptable limits including the EGT which I kept below
> 1100 degrees F post turbo.  So I guess my thinking runs in this order:  1)
> Oil could be leaking between the seals in the head gasket,  It has always
> been weepy since I got the car but no huge external shows of oil.  2)
> something in the “oil cooler” has failed or 3) some seal in the oil/water
> cooled turbo has failed. (I am hoping that this isn’t it as I really don’t
> want to get a turbo rebuilt.)  So what say yea all?  I intend to flush out
> the system with some degreaser and stay easy on the car until I figure out
> what to do.  Car runs fine, no real smoke except on hard acceleration,
> engine sounds about the same, maybe a bit “tinny” but nothing I can put my
> head around.  Really need the collective wisdom on this one before I dive
> in.  Thanks, Hayden
>
>
>
> "God is not a diviner being or a magician, but the creator who brought
> everything to life. Evolution in nature is not inconsistent with the notion
> of creation, because evolution requires the creation of things that
> evolve.” Pope Pius XII
> “There are many men of principle in both parties in America, but there is
> no party of principle.”
> “I do not know if the people of the United States would vote for superior
> men if they ran for office, but there can be no doubt that such men do not
> run."
> “I cannot help fearing that men may reach a point where they look on every
> new theory as a danger, every innovation as a toilsome trouble, every
> social advance as a first step toward revolution, and that they may
> absolutely refuse to move at all.”  Alexis de Tocqueville
>
> Proud owner of:
> 2014 Jeep Grand Cherokee Ecodiesel
> 1968 Beetle
> 1982 VW Jetta Coupe GTD "FrankenJetta"
> And many, many, many VWs; from a 1947 Beetle (13 Beetles total), to Vans
> (5 - 3 splitties  2 bay window (both were campers), 1 Vanagon Westy,
> Rabbits (3), Karmen Ghia (1), Jettas (11), Passats (2), Dasher (1), New
> Beetle (1), Rabbit Convertible (1) and Rabbit Pickups (3) most now gone but
> not forgotten.
>
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