900ss

I don’t do diesels so this is all new to me
Just brought a 52 plate Laguna dci with a blown turbo
Fitted a 2nd hand turbo and everything seemed fine
Car ticked over ok but pumped smoke out which I expected as the ol turbo had filled the exhaust with oil.
Then as I increased the engine revs the engine just took over and reved its tits off !!
Yes I shat meself as killing the ignition and removing the key didn’t do jack shit
After what seemed like an eternity the revs dropped enough for me to ram it in reverse n stall the engine
Luckily it doesn’t sound like its done any engine damage? but im still worried it will do it again
I can only guess its intercooler is full of oil? else how else could it of run and reved so hard?
Anyone else had this happen on a derv?

london_chris

yep, usually when diesels pick up oil they will just run until they blow themselves up,
sounds like you may have been lucky with it dropping revs itself,
dont suppose you heard whether it was bouncing any valves?
usually if i do any replacement turbo's on dielsels i replace the intercooler and make sure all the pipework is clean before restarting.

AlexF

Your lucky

It can stick a rod through the block!

GUZZLER

iTrader: (3)

check all the breathers aswell, if there blocked sometimes it can cause the turbo to draw the oil into the intake pipes, thus causing it to run on.

mechanic28

iTrader: (5)

hell yer seen it a few times!diesels love to run on engine oil mate!u lucky it did not self destruct itself!And your pop valve goes big time when it happens!A apprentice at work but a brand new diesel engine in a BT combo van!put oil in it (although brand new engine come ready with oil so it had 6.4 litres in it rather then 3.2!)took it outside got it nice and hot and started to do a dpf regeneration(which was not needed as it was brand new!)next thing he comes running in screaming help waving a set of keys in his hand!needless to say when we got out to the car park it was all over!one hole in the block !!!



make sure you oli level is ok!(set her just below the max line!)

make sure all the inlet is nice and clean and free of oil!you will have to take all pipes off and intercooler and give them a good clean!

focusv8

Renault have had a big problem with DCI blowing turbos and engines.
The main cause is the turbo oil feed pipe, it was too small and has been modded.

The inter-cooler will definitely have oil in the bottom.
Check the EGR valve as well that'll be partly blocked/jammed open with dried oil. (looking into engine, rear right hand side end of manifold, held in with 3 10mm headed bolts.

.

900ss

Cool appreciate all the advice
Obv it sounds like it’s a case of they do it then, so I don’t feel so bad now lol
From what I can rem just before it stopped the revs dropped a few k? then it sounded like it made a diesel knock sound, ie like you get when you use easy start?
I’m assuming it sucked in too much oil and started to try hydraulic? Anyway I’ve since re run it but this time with the inlet boost hose disconnected.
Sounds ok? but as said I will need to pull the cooler out n clean all the boost pipes aswell
Cheers

900ss

I did notice as it runs it seems to run as if its sucking in air for say 10 secs, then the inlet tone changes as if its then blowing and you can see what looks like fumes blowing out of the throttle body? (inlet pipe disconnected)
Sounds as if its going through the same cycle ever ten secs or so apart?
As said I know nowt about diesels so cant say I know why it might do that?
Unless that’s how the egr system works?

JTECH James

iTrader: (13)

ive seen a p100 do this due to a blown head gasket on the oil gallery...

the engine stopped when it ran out of oil with a bang...

then the fire brigade arrived as the locals thought our workshop was on fire

999

remove as uch oil as you can from all the pipes and cooler etc and she will be a goodun mate as long as no engine damage was done, also quick call to renault for the revised part numbers will let you know if you have the modded parts fitted

900ss

I must admit the amount of smoke it was kicking out it may aswell have been on fire
Deffo never had anything like this before and there’s nowt I could do to stop it !
Yes I shit it lol

JTECH James

iTrader: (13)

i wouldnt fancy using the engine or its components again tbh...

RichieST

iTrader: (2)

May possibly be EGR, like you tho I have limited knowledge of diesels. I would get it all cleaned out and back together, and see how it drives!

cossie604

iTrader: (2)

I fitted a turbo to a Vectra C under warranty, fired it up and thought I got away with it...set off on road test, sat at the lights when all of a sudden it decided to draw up what ever was hiding in the intercooler....lights changed to green just right and I went for it, cleared it out

One lad had it happen to him in the workshop...saved the engine but fucked the clutch. Phoned Vauxhall technical, explained we'd saved the engine but blown the clutch and they were very gratefull, signed it off with a case number etc with no problems. So yes it's quite common.

900ss

How easy is it to get the cooler out lol
Still, will be making a few calls tomo to see what’s what
Cheers

999

thats because it uses the oil as a fuel, diesels can run on oil, all be it veggie oil or a engine oil if its thin enough and revs are up enough lol, i once witnesed a racing cab lorry with no manifolds do this, imagine the noise of that


only difference was that one couldnt be killed, it self destructed

RichieST

iTrader: (2)

Should be straightforward enough. Wash it through with petrol until its clean inside

cossie604

iTrader: (2)

Just remove the lower charge pipe and drain it clear.

900ss

Cheers
As I run it up afterwards I did remove the lowest pipe to see what came out, but both sides are 3rd the way up the cooler!
So unless it has some sort or drain tap im dreading it be 3rd full of luvly engine revy oil lol
Still if its got to come out then so be it, providing it don’t rev like that again afterwards it’ll be worth it

Rax

iTrader: (1)

I had a 52 plate laguna which blew the caps off the cooler,smoked its bag off.Fixed under warrenty and i kid you not it took the accelerator pedal away from me 3 times reving flat out (fly by wire?) resulting in a knocking bottom end.The car had done about 60,000 with full history.I took it too the main dealers and the stupid thick bastard sales manager came out revved the tits of it and said "O yeah" and advised me to part ex it at a garage because they didnt want to repair it because the service history was from another Renault garage i think.The outcome ??,It got part exed at the same garage about a week later.They didnt even run it.

cossie604

iTrader: (2)

Suppose you could always fire it up with the intercooler cold side charge pipe off and clear it that way? You'll get a fault code stored as a result but tbh you've probably already gained some of them by now anyhows

900ss

It does say "stop" on the display lol

As it is I’ve disconnected the main o/s lower boost hose and have left it to drip over night
A small puddle of oil has came out of the hose, so there deffo is something in there
Think tomo I will reconnect it and leave the main tbh boost hose off to see if it blows oil out when reved?
With that main t.b.h boost pipe disconnected I can't see how it can rev away again? unless ive got that wrong?

999

seriously mate dont risk it remove the cooler and drain the fooker, if it goes pete tong you will be kicking yourself, heindsight is a wonderful thing, you have the chance.

900ss

I know, your right, could all end in else

Will see whats the score tomo
Cheers all

Nash

iTrader: (3)

You need to get the cooler out and fush all the oil out, then clear all the boost hoses and the breather, egr, I would also replace the oil feed hose as mentioned. Then after you have done this, start the car with your foot on the clutch but in 6th gear and see how it goes. If it starts to pick up lift the clutch and stall it.

Eagle

iTrader: (2)

had a nissan van do that whilst on the m20 i wasnt speeding honest hoooooooooge cloud of black smoke behind ...thought hang on i took me foot of the pedal and it carried on

900ss

Well I eventually got the frt end off to get the soding cooler out.
Have left it now with the cooler and hoses on their side to drip away over night
As n when its stopped dripping oil I’ll bung some petrol through to see what’s flushed out.
Odd thing is the oil that’s come out looks more like a mix of porridge n treacle

mechanic28

iTrader: (5)

you also lucky it has not burnt the tip off your injectors and parts of the injector getting hammered into ya pistons!

900ss

If it does that its gone !

morto

hi mate, did ya see my post on my focus tdci , compressor shaft snapped and put oil all over the place, needed 4 new injectors at 140 quid each new turbo and when they checked my timming the belt had a nick in it so new belt and tensioners and its still not up and running yet
but the bad news for you is i was told never to touch a laguna tdi , when i was on the phone to global turbo,s who supply most turbos,s to the trade he told me that if 10 turbos go out a week as many as 7 will be for laguna tdi, for me im gona sell mine and never touch a turbo diesel again.. give me my evo or rs any day off the week ....