[urq] Burning huge amounts of oil

[Maurits Jonkergouw]

Thanks for the info Frank. Good point. Still, if that amount of oil is 
burned, why can't I see any of it back at the exaust? One could say that 
such amounts of oil litterally 'leak' out the exhaust in liquid form rather 
then smoke?

When idle there is no smoke (only if I rev real hard) and when driving on 
freeways (very aggresive) I can't see any smoke either. Strange indeed... 
Someone said I might not *notice* any smoke and wet plugs because the oil is 
of such good quality (Castrol RS 10W60). Does this make sense? We are 
talking 1 liter per 500km here....

Regards,
Maurits

1986 quattro GV
1982 Coupe GL DD




----- Original Message ----- 
From: "fdekat" <fdekat at sentex.net>
To: <urq at audifans.com>
Sent: Thursday, August 30, 2007 2:39 PM
Subject: [urq] Burning huge amounts of oil


>
>> Message: 1
>> Date: Wed, 29 Aug 2007 18:54:49 +0200
>> From: "Maurits Jonkergouw" <urq at moregraphics.nl>
>> Subject: [urq] Burning huge amounts of oil after turbo rebuild and new
>> EM after 6 months of use.
>> To: "Audifans" <urq at audifans.com>
>> Message-ID: <002801c7ea5d$4fc04fd0$4101a8c0 at sp408076>
>> Content-Type: text/plain; charset="iso-8859-1"
>>
>> 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.
>
>
>
> Are you *sure* that the turbo oil drain hose has not been compromized ion 
> any
> way?
>
> On most turbos, the oil seals are very simple devices, and depend more on
> centrifigul force to spin the oil off the turbine shaft, rather than 
> actually
> ddoing any  physical sealing.
>
> Hence, the seals are very sensitive to any backpressure in the oil drain
> tube.
>
> If there is ANY restriction in the turbo oil drain  line (or the drain 
> line
> has been replaced with a smaller tube) there is the possiblility that the 
> oil
> would rather go out through the exhaust then down the drain..
>
> Conversly: If the oil isn't getting burnt in the cylinders, where else CAN 
> it
> get into the exhaust?
>
> Good luck!
>
> =Frank=
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