newbie with a turbo problem

[mattsbeamer]

Hi guys.

Newbie here.
I joined this site for my dad. He and his brother brought this cheap disco woth a fault.

Its a 1994 2.5td 200. Think that is what it is called.

There is a problem which i think is something to do with the turbo.
It was driven up a hill and needed and some revs which started the turbo off. The car sudenly took off like a rocket and could not stop it cause, the turbo got stuck on full blast. He managed to pull it over in neutral, but this engine was being reved by the turbo. He tried turning it off but couldn't so had to try and stall it. It must of been drinking the oil out of the sump, throwing black smoke for miles lol. i have no idea.
Any ideas what cuold be wrong. could it be some sort of valve.

Thank you

regards matthew :):)

[TEMPL4R]

The turbo has probably blown and is pumping oil into the engine from the turbo feed which is burning it in an uncontrolled manner. You can't switch the engine off, you have to stall it.
You need a new turbo.

If it wasn't burning oil it could be the diapragm split in the boost sensing part of teh injection pump.

Chris

[Underdog]

i have no idea.


So how do you know it has anything to do with the turbo?:confused: Are you guessing?

The car sudenly took off like a rocket and could not stop it cause, the turbo got stuck on full blast.
The turbo is driven by the exhaust, how can it possibly get stuck on "full blast"?:confused: The point I'm making here mattsbeamer is the engine drives the turbo.........not the other way around, so your turbo getting stuck on full blast is not the fault of the turbo............pretty much the same as saying the back wheel got stuck on full blast whilst riding a bicycle, isn't the fault of the back wheel..........you with me so far?;)
He managed to pull it over in neutral, but this engine was being reved by the turbo.
No it wasn't..........you're guessing again. Engines rev turbos ( remember.....they're powered by the exhaust;) ) not the other way around. You're guessing again.:rolleyes:
He tried turning it off but couldn't so had to try and stall it. It must of been drinking the oil out of the sump
Why do you think it was drinking sump oil? That makes no sense at all? He (whoever he is....oh yes, it's either your dad or your uncle ) probably couldn't turn it off because of many reasons and sump oil, more than likely, has as much bearing here as why the roof rack made a noise at speed. ( FFS I hope it didn't have a roof rack:D )
throwing black smoke for miles
Any diesel engine, if you rev it hard enough, will beltch out horrible amounts of smoke.....most usually black.

If I'm being totally honest here, you appear to be having some sort of sticking throttle problems but that is only an educated guess.:rolleyes:

Come on mattsbeamer, I'm trying to help you here.......what year is it, how many miles does it have and how much did your dad pay for it?

[d1scv]

Sense Underdog is going back to the kennels!
Our friends problem is a 'runaway'. Get out of it with an auto!

[mattsbeamer]

hi guys. :)

Thank you for answers and underdog for putting me in shape :).

Your correct mate, i wasn't actually there, and this is the basics what my uncle and his friend told me. I did actually say couldn't it be the throttle cable getting stuck? so i will have pleasure saying a land rover fan said it too lol :)
She is a L reg 2.5tdi 7 seater disco in what i would say is a olive green. Bit like the green in the background here. She has done 138000 miles, and is manual. Ill try and get some pics. She was £500

Take care guys :)

[ComicalEngineer]

I tend to agree with Underdog.

This is not a turbo problem. Turbo delivering lots of boost is a GOOD THING on a Tdi :D

Turbo not delivering boost is a BAD THING because you will have an ongoing no going situation - at least you won't go very fast.

I would start with the simple stuff:


Check the throttle cable isn't stuck open
Check the fuel pump actuating arm isn't jammed (the one from the end of the throttle cable to the pump)
Check the pump diaphragm isn't shot and keeping the fuel on full


As stated previously, any diesel with the throttle wide open will smoke! Yours is over-fuelling and the black smoke is SOOT from the unburnt excess fuel.

Oil smoke is blue!

Hope this helps

[Underdog]

She is a L reg 2.5tdi 7 seater disco in what i would say is a olive green. Bit like the green in the background here. She has done 138000 miles, and is manual. Ill try and get some pics. She was £500

Sounds like a bargain and that mileage is not excessive for a diesel Discovery either. The engines are relatively straight forward to fix but unfortunately the body work tends to fall apart around the chassis and it is this that determines a good 'un, from a bad 'un.

Good luck with it.;)

[toppa]

mmm uncontrolable revs, and not being able to turn it off, i have been there and it was indeed burnning sump oil, i got away with it, well for a few thousand miles more, there was damage but not so severe that the engine didnt keep running, as i said for quite a few thousand more miles...

Pull the intake off the turbo and have a look how much play there is in the spindle..

Or is it possible that there was simply too much oil put into the engine?

Cheers

[mattsbeamer]

Hello again.

Been speaking to my dad again.

I'll stick what one person said.

It was driven up a steep hill. The turbo kicked in, then it starting reving buy itself.. It could not be turned off and that it was running off the sump oil (which the mechanic said it was picking sump oil and burning it)throwing out blue smoke not black :)

Sorry about this guys, thank you for your patience.

[mattsbeamer]

Also been told the the spindle had no play, and the engine is now low on oil.

[lynalldiscovery]

Might not be the turbo, engine may be worn out and passing loads of oil into the intake pipe via the breather pipe, allowing it to run away, take the breather pipe off the inlet pipe and leave it to atmosphere and see what happens, and how much it breaths when warm.



Lynall

[pptkmp]

why does everyone blame the turbo straight away??? this is not a turbo problem, but as with most "turbo" problems, its something else in the engine. don't do anything to the turbo is my advice and get the rest of the engine checked out - that's where your problem is....

[ROB 110 HICAP]

Happened to me exactly the same, so I'm with templar and Toppa.

[Jostick]

Sorry to say, I agree with the dead turbo theory. Mine gave up the ghost on a trip to Wales. Had been smoking badly for a week or so. The spindle snapped and, as you say, the revs rise independent of throttle position as the engine pumps oil through the inter-cooler. You can take the key out but the engine revs away by itself. Quite dramatic as you obscure the landscape in smoke. A new turbo will cost you about £350 and you will probably need a new exhaust gasket. When you put it all back together wash the inter-cooler with paraffin (after emptying the oil, mine had a pint or so in it); yes, you do have to put that nut on under the exhaust manifold ( I don't care if there wasn't one on there when you took it off!); follow the instructions for oiling the turbo before starting the engine.
You may not think it's worth spending that amount on a £500 car so you better get busy with those spanners and sell the bits on e-bay!

[pptkmp]

Oh come on guys...LISTEN....before you pull the turbo off, just make sure the rest of the engine is working ok....was there too much oil in (will damage the turbo)...was there too little oil in it (will damage the turbo)...crank case pressure incorrect (will damage the turbo) etc etc etc.....don't jump to the turbo solution as long term it may cost you more....check everything else first...and if you do have to replace the turbo, one (very good) word of advice - replace the oil feed pipe...DO NOT USE THE ORIGINAL as it may (likely) be coked and this will damage a new turbo...follow EXPLICITLY the fitting instructions when replacing a turbo..PRIME the turbo before you start the engine....

[TEMPL4R]

The spindle snapped [/FONT]
Do you mean the Turbine shaft?

It's quite common on Garretts fitted to Renault 1.9 engines and some BMWs.

The exhaust side usually, it pumps oil into the particulate filter and exhaust pipe. Easy test is take the intake pipe off and rev the engine, the turbine doesn't spin.

If the turbo seals have gone, you can take the outlet pipe off or disconnect the intercooler, it will blow oil everywhere. It will empty the sump in a minute or two unless the engine takes off on it's own. The faster the engine runs, the faster it pumps the oil and it isn't governed.

Chris

[jofster]

newbie here too .............:eek: .............. i had the same trouble too turned out to be the head gasket blowing and letting oil into the cylinders ;)

[TEMPL4R]

That happens when the gasket blows at the feed to the rockers or camshaft, you get a pressure feed into a cylinder.

If it blows across the drains or push rod tubes, it chuffs into the crankcase on the compression stroke and draws some oil in on the induction stroke.

O series or T series ( Disco MPi engine is the same basic engine) can do that.

Chris

[roger2]

hi i had same problem with 200 same milage not turbo ,cylinder head gasget had blown. had to stall it to stop loads of smoke out of exhaust and ranaway with no throttle. best of luck. roger2