[Vwdiesel] vw turbo recall? 1.8T

Tad tadc at europa.com
Mon Dec 27 15:31:12 PST 2010

The 1.8t has an oil-cooled turbo, no?  I would venture that this is the
outcome of VW cheaping out and not using a water-cooled turbo.  On a TDI
it's OK because the EGTs are lower, but on a gasser the turbo gets too hot.

I wonder what kind of oil these sludged cars are running?

On Mon, Dec 27, 2010 at 2:54 PM, Tony and Lillie <
tonyandlillie1 at earthlink.net> wrote:

> Brian, I didn't know VW made a 2.0 20V in the states, what did it come
> from?
> The 2.0 TFSI engines are 16 valve, as the Direct Injection required
> replacing one of the valves with an injector. They couldn't find sufficient
> room for DI and 5 valves per cylinder.
> As to the 1.8T problem. Yes, It is a huge problem. Rarely have I worked on
> any VAG product with a 1.8T that doesn't have some evidence of sludge. And,
> let me clarify that term as well. The "sludge" that is a problem in these
> engines isn't the molasses like substance that used to collect in engines
> in
> the past. Rather, it's more like carbon particles, almost like grains of
> sand. They get stuck in the screen of the pickup tube and slowly block off
> the oil supply to the engine. I recommend to everyone with one of them to
> pull the pan and clean it at about 80k. It is more of a problem with the
> Audi A4's and VW Passats because of the engine placement. The Longitudinal
> placement necessitates a smaller oil pan, as it has to clear the subframe.
> So, they have more problems, and yet are much more difficult to pull the
> pan
> down from. But, if I owned one, I'd definitely be dropping the pan by 80k.
> I'd also run synthetic and change the oil every 5k max.
> The other thing that is a problem in these cars is that people are not
> taught proper cool down procedures by most salesmen. If you run a turbo
> hard, you need to give it an idle period afterward. Otherwise, the oil
> basically cooks in the turbo, and that's where the carbon particles can
> form
> as well. The smaller the turbo is (and it's very small on the 1.8T's) the
> more critical this becomes. A good Idle period is about 2 min, BTW.
> As for bent valves, I mostly see the hydraulic tensioners loose their
> pressure, and of course the belt jumps and bends valves. I've seen them go
> as early as 82k, and as long as 107k. I've never seen one that was run
> longer than that on a 1.8T. I would only go 60k if it was my car. In fact,
> I
> won't go longer than 60k on anything that is a valve bender.
> The water pumps do have some issues as well, as mentioned. The other thing
> they do is the plastic impeller expands over time off the shaft and no
> longer spins. If you ever see one that overheats in minutes, that will be
> why. You can check it by pulling the thermostat and feeling into where the
> impeller sits.
> Oh, and I'd love to see a pickup with a 1.8T or 2.0T. That would be fun and
> practical!! Mostly fun, though ;-)
> Tony
> ----- Original Message -----
> Subject: Re: [Vwdiesel] vw turbo recall? 1.8T
> > Hi Matt;
> > I have a friend that has a foreign car garage and does VW, Audi,
> > Jaguar, BMW, etc. Seems they find the weak point on the 1.8 T is the
> water
> > pump that adjusts the timing belt. People tend to change the belt and use
> > the old pump and then end up with many bent valves when the water pump
> > fails. On another thought I have a VW 2.0 20 valve turbo engine here with
> > a
> > perfect block and 12 bent valves because the car owner didn't change the
> > belt at the recommended time. 140,000+ miles and 12 bent valves. I
> haven't
> > decided what to do with the engine yet. Perhaps I will put it in one of
> my
> > 1981 VW Rabbit pickups.
> > Brian Decker
> > Western Washington
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