Disco Problems

Hi all,

I knew I would get back here one day, just wish it was under better
circumstances.

Problem: The Disco has been behaving itself and running fine until the
other morning. Stared as usual, bit of a frost, so I left it running a
few minutes to clear the screen etc. When I got in to pull away I
noticed clowds of white smoke pouring out the exhaust on reving the
engine. I decided to leave it for a while and check back later.

Upon restart, the tickover was fine again bit more smoke than usual, but
rev a little and lots of smoke again. I checked the oil filler to see
if there was excess back pressure, nothing there, or from the dipstick.
Upon further investigation I found lots of oil around the turbo inlet.
After disconnecting the hose, inside the turbo was floaded with oil and
the shaft of the turbo wobbling from side to side, more than it should!

Since stripping the turbo down and sending it to be examined, the tests
have come back that the turbo would have been OK if there hadn't been
excess pressure forcing the oil past the seals.

The question is now if the engine is blowing into the crankcase, notice
earlier that I did check the crank pressure for visible signs. Would
this only show when the engine is revved up however, or could there be a
blocked breather somewhere?

I know I will come to some sort of conclusion when re-assembling. Once
again the Haynes book has proven its worth............if we get any cold
weather it will serve as kindling!!

Your thoughts and advice much appreciated.

Tim
96' 2.5 Tdi Disco (soon to be back on the road)

>
> Upon restart, the tickover was fine again bit more smoke than usual, but
> rev a little and lots of smoke again. I checked the oil filler to see
> if there was excess back pressure, nothing there, or from the dipstick.
> Upon further investigation I found lots of oil around the turbo inlet.
> After disconnecting the hose, inside the turbo was floaded with oil and
> the shaft of the turbo wobbling from side to side, more than it should!
>
> Since stripping the turbo down and sending it to be examined, the tests
> have come back that the turbo would have been OK if there hadn't been
> excess pressure forcing the oil past the seals.
>
> The question is now if the engine is blowing into the crankcase, notice
> earlier that I did check the crank pressure for visible signs. Would
> this only show when the engine is revved up however, or could there be a
> blocked breather somewhere?
>
> I know I will come to some sort of conclusion when re-assembling. Once
> again the Haynes book has proven its worth............if we get any cold
> weather it will serve as kindling!!

Dunno about that but could it just be a failed turbo? The engine would
presumably overfuel as the turbo is not pushing enough air in and thus you
get the typical white smoke of unburnt fuel.

If you are talking about excess pressure in the turbo then I would guess you
have a wastegate failure which would allow overboost.
TonyB

In message <[email protected]>
Tim <[email protected]> wrote:

> Hi all,
>
> I knew I would get back here one day, just wish it was under better
> circumstances.
>
> Problem: The Disco has been behaving itself and running fine until the
> other morning. Stared as usual, bit of a frost, so I left it running a
> few minutes to clear the screen etc. When I got in to pull away I
> noticed clowds of white smoke pouring out the exhaust on reving the
> engine. I decided to leave it for a while and check back later.
>
> Upon restart, the tickover was fine again bit more smoke than usual, but
> rev a little and lots of smoke again. I checked the oil filler to see
> if there was excess back pressure, nothing there, or from the dipstick.
> Upon further investigation I found lots of oil around the turbo inlet.
> After disconnecting the hose, inside the turbo was floaded with oil and
> the shaft of the turbo wobbling from side to side, more than it should!
>
> Since stripping the turbo down and sending it to be examined, the tests
> have come back that the turbo would have been OK if there hadn't been
> excess pressure forcing the oil past the seals.
>
> The question is now if the engine is blowing into the crankcase, notice
> earlier that I did check the crank pressure for visible signs. Would
> this only show when the engine is revved up however, or could there be a
> blocked breather somewhere?
>
> I know I will come to some sort of conclusion when re-assembling. Once
> again the Haynes book has proven its worth............if we get any cold
> weather it will serve as kindling!!
>
> Your thoughts and advice much appreciated.
>
> Tim
> 96' 2.5 Tdi Disco (soon to be back on the road)

This sound suspiciously the head gasket. With the oil filler off and
the engine running, do you get "chuffing" (sounds a bit like a slow
doodle-bug if you see what a I mean), or oil trying to get out of
the dip-stick tube.

Richard
--
www.beamends-lrspares.co.uk [email protected]
Running a business in a Microsoft free environment - it can be done
Powered by Risc-OS - you won't get a virus from us!!
Helping keep Land Rovers on and off the road to annoy the Lib Dems

beamendsltd wrote:
> In message <[email protected]>
> Tim <[email protected]> wrote:
>
>
>>Hi all,
>>
>>I knew I would get back here one day, just wish it was under better
>>circumstances.
>>
>>Problem: The Disco has been behaving itself and running fine until the
>>other morning. Stared as usual, bit of a frost, so I left it running a
>>few minutes to clear the screen etc. When I got in to pull away I
>>noticed clowds of white smoke pouring out the exhaust on reving the
>>engine. I decided to leave it for a while and check back later.
>>
>>Upon restart, the tickover was fine again bit more smoke than usual, but
>>rev a little and lots of smoke again. I checked the oil filler to see
>>if there was excess back pressure, nothing there, or from the dipstick.
>>Upon further investigation I found lots of oil around the turbo inlet.
>>After disconnecting the hose, inside the turbo was floaded with oil and
>>the shaft of the turbo wobbling from side to side, more than it should!
>>
>>Since stripping the turbo down and sending it to be examined, the tests
>>have come back that the turbo would have been OK if there hadn't been
>>excess pressure forcing the oil past the seals.
>>
>>The question is now if the engine is blowing into the crankcase, notice
>>earlier that I did check the crank pressure for visible signs. Would
>>this only show when the engine is revved up however, or could there be a
>>blocked breather somewhere?
>>
>>I know I will come to some sort of conclusion when re-assembling. Once
>>again the Haynes book has proven its worth............if we get any cold
>>weather it will serve as kindling!!
>>
>>Your thoughts and advice much appreciated.
>>
>>Tim
>>96' 2.5 Tdi Disco (soon to be back on the road)
>
>
> This sound suspiciously the head gasket. With the oil filler off and
> the engine running, do you get "chuffing" (sounds a bit like a slow
> doodle-bug if you see what a I mean), or oil trying to get out of
> the dip-stick tube.
>
> Richard

Hi,

I first thought this myself, but after seeing it run on tickover as
normal, bit more smoke than usual and not having the usual chug chug
noise from the oil filler or dipstick with leaking compression, it had
me guessing. I may have traced it to a collapsed breather hose,
something I feel I should have seen beforehand!

I will be getting the turbo back on Monday so will know more from then
on I guess.

Cheers

Tim
Cornwall

"Tim" <[email protected]> wrote in message
news:[email protected]...
> Hi all,
>
> I knew I would get back here one day, just wish it was under better
> circumstances.
>
> Problem: The Disco has been behaving itself and running fine until the
> other morning. Stared as usual, bit of a frost, so I left it running a
> few minutes to clear the screen etc. When I got in to pull away I
> noticed clowds of white smoke pouring out the exhaust on reving the
> engine. I decided to leave it for a while and check back later.
>
> Upon restart, the tickover was fine again bit more smoke than usual, but
> rev a little and lots of smoke again. I checked the oil filler to see
> if there was excess back pressure, nothing there, or from the dipstick.
> Upon further investigation I found lots of oil around the turbo inlet.
> After disconnecting the hose, inside the turbo was floaded with oil and
> the shaft of the turbo wobbling from side to side, more than it should!
>
> Since stripping the turbo down and sending it to be examined, the tests
> have come back that the turbo would have been OK if there hadn't been
> excess pressure forcing the oil past the seals.
>
> The question is now if the engine is blowing into the crankcase, notice
> earlier that I did check the crank pressure for visible signs. Would
> this only show when the engine is revved up however, or could there be a
> blocked breather somewhere?

> Dunno about that but could it just be a failed turbo? The engine would
> presumably overfuel as the turbo is not pushing enough air in and thus you
> get the typical white smoke of unburnt fuel.
>
> If you are talking about excess pressure in the turbo then I would guess
you
> have a wastegate failure which would allow overboost.
> TonyB
>
>