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white_lancer 11-10-2012 10:28 AM

Crankcase Vent Hoses
I replaced my cam sensor today and whilst I was poking around the engine bay I though I would take a look and see if i could identify where I may be having a vacuum leak. I found the crankcase vent hoses - or rather what was left of them!

here is what was left of them when I stripped out all the parts!

I have ordered new hoses from the internet but what I dont know is hwere they connect to.

here is one end of the connections

and here is the other end of the connections

my question is - where does the top hose connect to and where does the bottom hose connect to?

the engine is an M62 from a BMW X5 2002 E53 4.4i

thanks for your help


Mudnyrey 11-10-2012 12:55 PM

1 Attachment(s)
Hi Tony,

Based on your vin# from your previous posting, this is a pic of your "Right" hand drive model. (Picture Below)

BMW V8 and 6-Cylinder Crankcase Ventilation Check Valve Replacement CCV, CVV, PCV, Oil Separator, Cyclonic, DIY How To on September 4, 2012

Half way down the page. Hope this is helpful.


white_lancer 11-11-2012 11:34 AM

Vent Hoses
The video was informative but does not require the removal of the crankcase vent hoses.

I can see from the diagram which hose goes where on the oil separator but need to know which hose goes where on the other end.

It looks as though hose 5 goes to the top connector (connection 8) and hose 4 goes to the bottom connector (connection 7)?


Mudnyrey 11-12-2012 02:06 PM

Yeah, I know the video wasn't entirely thorough and was hoping it would have given better detail about those hoses in question.

From your pic and the diagram,

Looks like hose #4 goes into #6 lower position of your separator unit and the other end listed as #7 goes into the tube on the lower right hand side of your picture.
Hose #5 goes into the Top #6 position of your separator unit and the end of that tubing listed as #8 goes into the Top portion of your picture which is your Ventilation Check Valve that's on back towards the firewall.

I'm sure you got it by now?


white_lancer 11-12-2012 11:53 PM

Thanks mate

yes I agree. connection #8 is at 90 degrees and so is the hose and connection #7 is slanted like the hose so I think this is right. thanks for your help.

white_lancer 11-15-2012 12:01 PM

hoses replaced and fault codes gone!

Mudnyrey 11-19-2012 01:24 PM

Glad to Hear Tony!


sunny5280 11-19-2012 02:41 PM


Originally Posted by white_lancer (Post 7196947)
hoses replaced and fault codes gone!

This is a common problem on the E53. Enough so my indy specifically checks them during a PPI.

airplane 12-01-2012 06:31 PM

I have a 04 X5 4.4 that had the CCVs replaced about 1K ago. Im still getting some smoke after idling. I disconnected one of the tubes that goes between the CCV and the intake and put my finger in it when I pulled it out it had a thick film of oil on it. Is this normal? Is that much oil supposed to be getting past the CCvs? Also wouldn't that make it smoke?

white_lancer 12-02-2012 02:29 AM

The oil separator is supposed to remove the oil. I changed both hoses 400 miles ago and have no smoke. Check the oil separator is functioning correctly

airplane 12-04-2012 11:53 AM

As far as I know the oil separator on my vehicle is the CCVs on the top of the valve covers, I could be wrong. I was told that they were replaced recently. I checked them myself and they seem to be ok no tears cracks or other problems that i can see. It seems odd that the oil in the vent tubes is very clean and I just changed the oil about 500 miles ago. Seems to be getting past somehow. Im wondering if excessive vaccum from the engine being sludged up inside could cause this?

white_lancer 12-04-2012 12:44 PM

not sure what engine you have. mine is the M62 check out the third photo in this thread - that is the oil separator on my engine

Graham132white 12-05-2012 09:55 AM

Wow them hoses were bad white lancer! Did your x5 actually run like that, looks like they were like that a while.. I think I'm right in saying that would cause the inlet diaphragm to stay open and thus give a massive vac leak?

white_lancer 12-05-2012 10:25 AM

yes beleive it or not the car ran absolutely fine with the damaged hoses. They were like that when I bought the car so changed them asap. had a whole load of error codes up due to the vac leak which all cleared once the hoses were replaced

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