Renault Clio PCV Clean Out And Investigation (The Rocker Cover Saga Part 4)
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- Опубликовано: 26 авг 2024
- Today a video I've wanted to make for a long time.
A detailed look into the PCV system on the Clios fitted with the 1.2 litre D4F engines. The system is a sealed unit on the D4F and can sludge up and block.
Lets see if we can figure out an effective method to clean it out.
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I completely agree with you:
The system is simple (quite basic, really), which is a good thing, as it makes it cheaper. However,the lack of proper and available information, especially service information, causes a great deal of issues.
Due to my wife pouring too much oil in the engine, I had an issue where the oil came up through the pipes you cleaned in this video, and clogged the air inlet. My air filter was half soaked in oil.
This left the engine not working properly, as: (a) the oil was getting inside the combustion chamber, (b) the throttle body was being soaked in oil, while also (c) the engine was struggling to get air in.
This was quite difficult to pin point the exact issue, thus, expensive to diagnose.
All because this system is hidden, and there is very few service information available.
Moreover, a valve controlling the system could prevent my issue from happening - alltough I admit it was user-error which started the issue.
Therefore, thank you for this video!
Cheers from Portugal.
I used your tips for the Gasket replacement and all went well. Thanks for the time !👌👍
Done all 4 steps last weekend, now has no leak and the engine Is smoother, thanks again!!!
Also one handy advice for cleaning those hoses, I tried with the brush like yours and for small hose it's possible to clean it but for longer one I used regular coper wire and small piece of rag attached to the end so i needed to pull it cople of times but did the job. Also I know it's not advisable but brake cleaner was game changer, a lots of black gunk went out, and quickly after I wash it with water just to remove any leftovers from brakecleaner not to leave it soaking the rubber.
OMG OMG You finally demistified question where PCV valve on this engine is, since I asked bunch of experts and no one provided me an answer, also my Clio is making mayo last cople of years and everyone told me this is cause of bad oil or short drive. Also rocker cover seal is demaged and there is oil everywhere. If I ware closer I would drive you my car for inspection.
I've spent 2 hours reading on this today 😂 the online discussion never ends 🤣
Such a good mechanic, he really did solve the mystery of breather system on this d4f series.
I made that cleaning few years ago in modus. I needed a lot of degreaser. Cars with short average running time had that chamber full of butter :)
Best idea is using pressure washer with hot water and cleaning chemicals.
Bonjour . Je possède une Renault twingo II de 2010 moteur 1,1 16V . Mon couvre culasse possède t-il une valve PCV ? Comment savoir si l'orifice qui sort du couvre culasse est bouché ou pas ?. Y at-il une valve anti retour dans le couvre culasse et dans quel sens s'effectue le flux ? Merci
I wonder if catch can (OCC) can solve this.
Hello again friend! I dont recall whether you mention about the gasket, cylinder head, and replacing the coolant videos for the future. Thanks for all the videos!
Coolant will be happening next time the Clio comes in the garage. Head gasket is unlikely unless it fails which is unlikely on this car.
This video is gold mate. Thanks from Spain
Could the motor oil consumption have some kind of connection with the system being blocked?
I had my cover off and cleaned it with some spray cleaner and blew it dry with compressed air - and let it dry over night. The leaking valvecover gasket is for sure the blockage of the "pcv". Did a oil change and had the valves adjusted. Fillerneck was fully clean and after the drive the sludge i back in there. I might need to do the gasket again - as i bought the version with 2 cap ends and had to cut it at the flywheel end and had to silicone the seam and so on.
Hope the videos helped you.
I changed the gasket now for the correct one - was leaking a lot again. I soaked the cover in hot water and degreaser too. I have a oil burner as well - but a change to 5w40 seem to have helped somewhat - i def have more mayo then there should occur, and i take of the pipes once a month now to check and clean them. This system is really a shitshow for sure..
Excellent, great video!
Hola, el auto puede tirar humo blanco si l valvuala esta dañada?
Great video,
Can you do one on changing the valve stem oil seals?
My clio smokes like crazy on start up but clears very quick.
Might happen in the future but it wouldn't be for awhile I'm afraid.
Hello, any ideas of what is the cause for uneven idle ? 2011 Twingo, 1.2 16V. Has had a new catalytic converter, new pre-cat lambda sensor, new IAT sensor, cleaned throttle body, new coil pack, new plugs. Idles at the factory 650RPM however its shaky. Also had the valves adjusted, along with regular servicing.
Have you checked for vacuum leaks?
@@SocketsAndSideburns Did try starter fluid around the throttle body, and around the manifold, did not seem to affect anything.
Check the pipes also. Brake vacuum pipe especially can split.
Could it be throttle adaptation?
Hello there, thanks for this amazing video!
I have a D4Ft 1.2 TCe engine. Intercooler and intake pipes full soaked with oil, also going inside the throttle body.
Turbo was changed, compression on the rings is good. I will replace this week the valve stem seals.
I was thinking of cleaning the rocker cover, is there no valve inside? Just chambers to clean?
What would a blocked rocker cover cause?
Because I'm having a little of oily white smoke after idling for 30 seconds.
I am not sure with the turbo engine as I have never taken one apart. But why was the turbo changed? I would think a failing turbo a far more likely cause of all that oil. The pipes should have been cleaned when the turbo was replaced.
@@SocketsAndSideburns Thanks for your reply!
Car had 230.000 km. Turbo started to fail and eating some oil.
Pipes were all cleaned, even the intake system, but never thought of cleaning the pcv system.
Rings are ok, turbo is new... how is it that my intake system is full of oil?
Will be changing the valve stem seals in the next week.
Very helpful video , also seeing oil on the air filter . My car is jerking a bit at a certain pedal/throttle position . Was wondering if it might be the oil/mayo covering the sparkplug, do you know if this could fix it perhaps?
I would be very surprised if this was the cause. I would suggest watching the voltages of the accelerator pedal tracks on live data as a starting point.
Does this apply to clio sports 2.0L too? There are several discussions on clio sport forum regarding the subject. As a trainee mechanic I love your channel, wish someone would do a channel like this on my old 172 😅
So that would be the F4R engine? These I believe have a separate oil decanter bolted to the top of the rocker cover. Inlet manifold off job. No valves as I can see in the system and works in the same way as the system on this car. Pipes and a decanter to clean.
Hi, i have clio mk3 1.2 16v 2008.I have a problem on low idie when engine is normal warm without touch a gas pedal rpm oscilating from 500 to 1200. I was replace pcv valve pipe and inlet manifold seals but problem is still present. Valve cover is leak probably becouse have a oil leak and i will replace soon. But problem sugest me there somewere in inlet have an air leak.On drive engine ride good dont have misfireing run good.I replace trottile body and same problem.Can you help me how to fix this issue please.
Reset ecu and relearn the tdc.
@@ShanaXperia91Thank you, i'm solved issye few mounts ago.Problem was little leaky inlet valve on 3rd cyl.
Thanks a lot !!!!
Did rocke cvover clean solve any problems in the long term?
It solved the small oil leak. Can't really say that the valve clearance adjustment improved engine performance. Top end seems a little quieter but I might just be imagining that. PCV clean didn't change much either but obviously mine wasn't that bad and certainly not blocked. I made the series mostly because I was taking the cover off anyway and I wanted to show as many jobs as possible while it was off.
@@SocketsAndSideburns my clio has a small oil leak on the left side seems like under air filter, which is contaminated with oil, I asked renault mechanic for a diagnosis and he suggested rocker cover replacement. I'm going to try your method though, thanks for awesome videos, your channel in really helpful.
Hello thanks for the video. I want to ask can bad pcv valve give blue smoke from exhaust and could i just vent it out not connected to the inlet. The engine is the same. Thanks
There is no valve as such to go bad, my guess would be that the oil is getting into the combustion from somewhere else if it is significant. No you cannot do that, you will have a vacuum leak on the inlet unless you blank the pipe and the gases from the open rocker port could potentially end up in the cabin, not to mention emission concerns.
I just checked the pcv pipes and they had the mayo. Used a wire to poke the hole in the back of the rocker cover and clean some more. Am I right in thinking if I can't blow air through that hole the pcv system is clogged or is there a one way valve or something?
If you have removed the rocker cover then yes you should be able to blow air though it the is no valve. If it is still on the engine then it will be like blowing into a bottle, the only way out for the air will be past the gaskets and they may start to leak.
@@SocketsAndSideburns ok, so it is working as intended although there's oil everywhere. I didn't remove the rocker cover yet.
Hi mate,
I changed the valve cover gasket on my gf’s 2003 Clio 2 1.2 16v a few months ago and also cleaned the cover with hot water and break cleaner. Unfortunately I didn’t deeply clean it as you did. Anyway after the repair the car was smoother and seemed to deliver more power than before. However it’s been 6 months now and the car starts again to go limp mode, or is often unable to go over 3000rpms. Do you think a dirty valve cover and PCV system could cause the throttle body to fail ?
Best regards ✌️
Hello, I would doubt that the PCV system could cause such a big issue especially after such a recent clean. If the car is going in to limp mode then you should have a code to help give you a direction. I'd suggest scanning for codes and seeing what you have.
@@SocketsAndSideburns hi ! Thanks for your answer. I managed to find the reason of the P0638 code. It’s not the throttle body. I just cleaned the ECU plugs and connectors and it works.
Thank you for this video. Can pcv be cleaned for Renault Megane Scenic 2003 if possible?
It would depend on the engine that is fitted.
Is the “mayo” a chemically produced product or simple oil and water mix? Would idling a hot engine for some time with the oil cap off allow that water to escape?
It is oil vapour mixed with condensation yes. A good run may reduce it but if it has turned to sludge then there is no substitute for manual removal.
Hey mate. I have a 2014 renault kangoo 1.5dci k9k engine. Ive tried searching online everywhere for the location of the pcv.. with zero into on where it may be. Have u worked on any kangoo and may have an idea where to look?
I' afraid I haven't dealt with one before. I cannot even find it in the Renault manual. The system is a pipe running from the rocker cover to a pressure sensing valve then into the air intake somewhere before the turbo. I would look for pictures of it and try to find it simply by looking.
@@SocketsAndSideburns yeh on my kangoo it looks to be built into the rocker cover. Where as other models or earlier models have it in the same spot but removable. Being its built into the rocker cover im bit hesitant on trying to pry the lid off in case it breaks and im unable to seal it back then cars gona be off the road etc etc til a new one is bought.. if the membrane is held on by that cap its held on there pretty dam well. Ive tried to pry a few times and it just doesnt feel like its a cover cap that would click back on
Does D4F784/786 have the same PCV system built in the rocker cover? The rocker cover is metal
The Renault manual only had the whole D4F family under the same information in this video. If you really want to know you'll have to take it apart.
Rocker cover D4FT turbo is metal
man u sure do a lot of preventive maintenance on that engine. u wanna keep it going like an old Mercedes? 1000k Km maybe
i say if it is not broken don't fix it... u feel me?