Hi everyone! For some times I noticed that I got some oil covering the front and lower end of the engine and I got information that it might be due to PCV membrane being perforated ( I took the test to check if that the case , with engine turn on , leave the oil cap loose and it seems that was jumping quite high) and my question is does this membrane have an aftermarket code? I searched with 0248.G5 but it brought the whole cover and I don't want to replace the whole cover of the engine.
Below I will attach a picture with the cover
DW12BTED4 PCV membrane replacing
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mickthemaverick
- Forum Admin Team
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Re: DW12BTED4 PCV membrane replacing
I can't offer any help with the membrane I'm afraid but I just thought I'd ask if you have checked the injectors? It is fairly common for an injector leak off pipe to fail spilling oil down the engine and worth checking! 
I used to be indecisive, now I'm not so sure!
I used to ride on two wheels, but now I need all four!
I used to ride on two wheels, but now I need all four!
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Saldan
- Posts: 12
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Re: DW12BTED4 PCV membrane replacing
The injectors are fine, the engine is working without shocks so no, I don`t think they are at fault.mickthemaverick wrote: 03 Aug 2026, 16:15 I can't offer any help with the membrane I'm afraid but I just thought I'd ask if you have checked the injectors? It is fairly common for an injector leak off pipe to fail spilling oil down the engine and worth checking!![]()
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aspire_helen
- Posts: 220
- Joined: 08 Sep 2020, 22:12
- x 80
Re: DW12BTED4 PCV membrane replacing
Just a thought. Are you sure it is (engine) oil? A diesel leak can result in the same grimey look. I know. I spent weeks trying to trace an "oil" leak which had blanketted the whole engine and compartment with dirty black grime. It turned out to be diesel leaking from the diesel filter housing .... the lid had not been properly screwed home by the previous Citroen service.