[urq] Burning huge amounts of oil after turbo rebuild and new EM after 6 months of use.

[Ado Sigal]

That's huge amount of oil burned, and if it started after rebuild, it 
must be to do with work done.

- First establish where the oil is burned. If in cylinders, the plugs 
would be oily with lots of deposit, and if plugs are fine, then the oil 
is burned through hot side turbine seal. The exhaust will be oily in 
both cases.

- If oil is burned in the cylinders, and it wasn't before the work, it 
could be that crankcase pressure is created, and is pushing the oil 
through valve guides and oil viper rings into cylinders. To make sure 
that there is no pressure going to crankcase, simply disconnect the 
crankcase breather hose that goes from igloo to valve cover. Cap the 
igloo end end, and test for smoke. Might also check the other breather 
to IM connection, which is one way valve with metered orifice. Clean it 
up and make sure it works correctly. (If excessive crankcase pressure 
was created, as indication, the engine would be wet arround valve cover 
and other related oil seals.)

-The routing of crankcase ventilation is the difference between GV and 
WR, not the exhaust.

- Change of oil line plays no importance, if the leak on the old one 
didn't leave the engine without oil at any time.

-Dialynx EM also controls wastegate through the bottom WG chamber, which 
is connected via same metal/high temp hose as the old one was. This only 
plays part how well WG is controlled, but plays no part in the oil issue.

Well, test and let us know which one it is.

Regards,

Ado


Maurits Jonkergouw wrote:

>Hmmm, oil consumption is getting worse each week since april this year... Did a small test, perhaps you could comment on this:
>
>Idle for 10 minutes > accelerate fast to 5000 RPM > huge cloud of smoke from the exhaust.
>
>Guys, what does this mean? I'm very worried about this new 1 liter oil per 500 km thing.
>
>Also checked the 'michelin hose' for oil by disconnecting it at the iglo and putting down a rubber flex hose all the way down to the turbo intake and pulled it out to see if there was some oil on it, which is not. Perhaps not the best way to check but didn't want to remove the tray below the bumper and disconnect the hose directly from the turbo intake...
>
>Things that might be of importance: one of the oil cooler lines has been replaced, not sure it was exit or supply though. Turbo is a rebuild and valves are readjusted to spec. My old exhaust manifold was cracked and is replaced with Dialynx EM, all at the same time around december 2006. 
>
>Before the EM swap there was a hose present from the iglo to the wastegate, but is now removed. The header on the iglo is capped off, the header on the wastegate is not capped. To my knowlidge the wastegate is now controlled by turbo pressure.
>
>Another thing that I still don't understand: this is a GV engine, not WR, and the only difference is some of the exhaust is routed back and reburned or something like that to reduce CO. I've red that the original WR engine used exhaust pressure to control boost level, I'm not sure if the original GV uses the same technique and if the 'new' Dialynx method controlling boost  without exhaust pressure? (not sure how exactly boost level is controlled withe the Dialynx EM), interfers with the original GV method to reduce CO, in other words: this is bad or good.
>
>Any comment or insights/thoughts are welcome, thanks.
>
>Regards,
>Maurits
>
>1986 quattro GV
>1982 Coupe GL DD
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