Hi

I own a 03 Carisma DID with F9Q1 Renault engine. I have the car about 12months and noticed the pipework surrounding flapbox and egr valve on the intake/exhaust manifold were wet with oil.
I removed plastic and rubber hosing working back towards the intercooler fan and these were also wet with oil residue. The inside of the manifold was also quite dirty with a layer of greasy oily build up. I cleaned this up a while ago but I noticed the oil weep again and I have covered about 5K miles. Car was serviced recently.
I have uploaded a scan of some pictures to help explain myself. sorry if its not that clear.
Is this normal and what are the possible causes?

Thanks for any help

Flapbox? Sum of yur pictures are a little mislabled. Yu do mean the charge air ABV inlet connection, i do not think FlapBox is the correct name. Wut yu are saying is that the charge air inlet piping leaving the charge air cooler and riser piping all has an oil film within it? This can be a cause in a failure in the crankcase ventilation and passive circulation system. The plastic Charge air ABV inlet connection that connects to the intake plenum has a rubber gasket , after time the rubber and plastic assembly warps after time and causes the seepage at the bolts and even the housing.

Also the turbo can be also causing this issue. If the oil delivery pipes have higher than normal pressure , as in using too high viscosity oil and causing sum of the oil to leak pass the internal oil seals of the turbo chargers turbines . Also failing oiling seal rings in the turbo can be allowing small amounts of oil pass the seals and into the charge air side of the turbo and into the charge air intake path.

Thanks for the reply and there is a lot of good information there. Sorry about my mis labelled parts but I was working off a diagram from the service manual I downloaded which isnt the best for the F9Q engine.

Wut yu can do is the charge air piping leaving the turbocharger/charge air compressor going to the charge air cooler or as most call it intercooler , and see if there is a heavy film. Also remove the charge air inlet hose leaving the air cleaner going to the turbocharger . One of the passive crankcase ventilation hoses should connect to it as on most models. If there is a very light coat of oil film , very light inside teh tubing going toward the turbocharger inlet side , thats normal. On sum models with this engine yu will not have a passive crankcase ventilation hose fitted to this charge air inlet pipe as it is fitted to the air cleaner box , so do not be alarmed if yu do not see one.

If there is a very heavy thick coat of oil , oil film in the inlet side hose before the turbo, there is an issue with the passive crankcase venting system. The passive connection hose that is fitted to the upper end the engine at the cam cover and rail fitting assembly , has an oil splash shield in it , to prevent high volumes of oil frum getting into the passive vent system as it vents internal engine pressure . BUt if the previous owner neglected regular oil changes or service , old oil would collect around the splash shield and slowly caking up there over time and partially sealing the area , so oil gets trapped in the internal side of the splash shield and gets pulled into the ventilation system causing high oil residue in the charge air system piping and intake and causing the a residue leak at the plastic charge air ABV fitting and after time causing the rubber o ring in the plastic abv fitting to premature swell and fail after time.

If there is not a high residue in the charge air inlet piping coming into the turbo , but a high film in the charge air piping after the turbo , it is likely to be a oil seal issue with the turbo itself. This can be caused by a number of issues. Lastly a clogged main ventilation port will cause higher pressure in teh passive area causing also the oil film