I've just bought this Renault Grand Scenic and on the drive home a 'Check Injection' light and the SERVICE light came on. I checked the schedule on the ECU and it tells me I've got 14,000 miles to go til I need a new one??
Anyway, that's a different story (which could possibly be related)... Read on...
Upon getting home after a 30 minute drive, I noticed a whiff of smoke come up out the vent in the engine bay which made me lift the bonnet. I tok the engine cover off and found that the 1" Crankcase breather pipe had been disconnected from the small disc type cylinder towards the back of the engine and turned to just point anywhere.
With the engine running, I could feel quite a bit of pressure coming out of this pipe, and then I took the Oil filler cap off and had the same problem there, although the header tank looked fine (not contaminated) and the inside of the filler cap had no mayo.
The car drives fine, with no smoke out the exhaust. It is a bit underpowered considering it's supposed to have 120bhp, which is leading me to believe there's something not quite right. Almost as if the turbo isn't putting in enough power, or something is retarding it in some way, or there's a dodgy reading.
Can someone possible give me a few pointers please? I've done nothing it it yet except take a look at the boost pressure solenoid/ sensor connections, but it's bl00dy tight in there - and hot - at the moment...
I too have a 2005 grand scenic 1.9 dci with similar problems,only bought it 2 weeks ago and noticed straight away that there was smoke from the engine bay.There is loads of servjcve history with the car including new turbo and the dash has been done also (previous owner had dlne all this).upon further investigation the cover was taken off the engine compartment and a black flexi pipe was found that had been llugged.Also found a pipe underneath the passenger side of the car,this is where the smoke is comming from.The car is rumnimg fine,no white smoke,no loss of power but when,why would someone plug this pipe and redirect down through the dngine bay and underneath.?There is a bit of blow comming from the oil cap once removed,is it time to get rid of?
I'm not sure it's time to get rid. My car sounds exactly like yours! New dash, 70k miles, plenty of service history etc.
In my experience with having the same engine in my Traffic a couple of years ago, they are good engines, they just suffer from dodgy electrics, turbo hoses wearing out etc.
Gonna have a general clean up later today to see if I can find any more gremlins...
Hi, dont write off your engine just yet, people always assume its the turbo its not, yes its a possability but i think you will find your problem is caused by your piston rings gumed up,and thats why you have to much blowbye, clean out all pipe work on the crankcase ventilation system including the plastic container were you put your oil make sure you P.C.V valve is still servicable reconnect all your pipes, Double flush your engine and use new filters, use a 10/40 semi oil and go from there, People disconnect the pipes to stop the engine smoking, Im of the opinion that engine services are left to long 18,000 miles between services is to long....Good luck
Really don't know what to do.We only bought the car as everything that can go wrong,did go wrong and were all fixed by the previous owner.We love the car as it fits all are needs.The turbo was only replaced approx 6-8 weeks agnce I discovered the pipe that had been plugged I obviously assumed the worst and thought someone has done this for a reason.Mine too is a 2005 with 97k but with 27k showing on clock.The car is driving 100%,don't really want to get rid of it as it will be hard to replace it with another 7 seater in the same price bracket.Should I take a chance and drive her on and possible take out a warranty on it for peice of mind?
Hi Pabs,let me know how you get on pls.Gonna take mine for a long drive and possibly get a second opinion before i start connecting pipes and getting the engine flushed.
A couple of the turbo pencil hoses were a bit wiggly loose so I cut fresh ends and re-connected them. She seems to have a bit more go in her, but the pressurised crankcase blowback is a touch worrying.
I'm afraid I have to disagree about the use semi synthetic oil.
Use the oil that Renault specifies, which in the case of my 130 FAP is a high quality oil that's 5W-40 fully synthetic ACEA B3 or B4 rated. Sure it's more expensive than just 'usual' 5W-40 but compared to the price of a turbo and or engine it's not too bad once a year.
Using the wrong or cheap oil and sticking with long servicing times is what is killing so many modern turbo diesels.
For example if I run cheap/non spec oil in my FAP then the extra pollutants/particulates in the exhaust will block up the DPF faster than it was designed for, the engine management responds by trying to regenerate the DPF by altering the injection cycle and this leads to the oil being polluted. So the more often the DPF is regenerated or tries to regenerate the more out of spec the oil becomes in a shorter period than the servicing schedule allows for and from there leads to a build up of gunk in the oil pathways, bearings, etc. This in time can/will lead to bearing failure. Also consider the polluting effects of EGR systems on modern engines. You can't run a modern common rail diesel like an old Perkins or York engine and I think that's what catches people out.
No offense is meant by this, I just think there's a lot of incorrect information and myths surrounding diesels.
I fully agree its all down to oil and filter quality.My dad has just sold his Megane 1.9 dci 2005 reg,103,000 miles.Ive serviced it from new using the correct RN spec oil and dci oil filters,which are bigger then normal oil filters (lots of non gen suppliers supply incorrect filters).He never had any turbo/egr problems at all.
Hi Guys, on further investigation, the bottom part of the oil filler bottle seems to just 'sit' in the crankcase. This can't be right. How is it meant to be please? The black plastic bit is bolted to the stainless steel part (a flange with a 1" neck) underneath and I can just lift it all out in one piece. I assume this isn't right.
Maybe the steel part is meant to be pressed in? I know this isn't the cause of my problems, but it would be nice to know that it can't just let water and crap directly into the crank!?
Just wanted to ask if you tried the engine flush and if it made any difference as I am having the same issue with my 1.9 dci to the extent it blows the side breather hose off the filler bottle after the engine warms up.
If yours is actually blowing oil up out the pipes I'd be careful. These engines, when the turbo kicks in, can actually suck the engine oil UP those pipes you mention (as the turbo creates a heck of a vacuum). This means that as the turbo vacuum sucks the oil up, it forces it then into the combustion side of the engine. The engine then revs it's nuts off and there's not much you can do to stop it but hard stall the car...
Check your breathers again.get a nice long and tough cable tie and give the holes a poke.
hi, just wondering if any of you have diagnosed or cured the back pressure issue, i too have agrand scenic dci which has blow by, to the extent it eventually forces all oil out through breathers!!!i removed pipes and put clear plastic ones on and oil comes up all , through the separator and through small drain back port, other than this starts and runs ok,is this blow by caused by rings? i also have vivaro dci to compare to and that has minimal blowby