Hi I have took off my coolant manifold at the back of the engine (4.4 v to fix a leak. I have accidently removed a hose that I never needed to and discovered it is full of oil and water - like mayonaise.

the picture shows a red arrow pointing to the part i am trying to identify.

http://farm9.staticflickr.com/8202/8198982575_fa1f2cabec_b.jpg

thanks for any help[/img] MY2010 TDV8 Vogue Ipanema Sand
2002 V8 Vogue Oslo Blue - Gone.

Last edited by woodchopper23 on 19th Nov 2012 4:01pm. Edited 1 time in total

finally managed to get the photo link to work MY2010 TDV8 Vogue Ipanema Sand
2002 V8 Vogue Oslo Blue - Gone.

right it look like the hose is going to the "inlet manifold end cover" and the other end of the hose is going to the "engine breather seperator" MY2010 TDV8 Vogue Ipanema Sand
2002 V8 Vogue Oslo Blue - Gone.

Hi there I have discovered that the hose between my inlet manifold end cover (back of engine) and the engine breather seperator are full of mayonaise . it seems the oil and water have mixed some where.

could anyone help me out with figuring where the oil and water could of mixed?

Because the hose is full of emulsified oil, I assume the seperator is also full of it and the inlet manifold end cover too? : (

HELP!  MY2010 TDV8 Vogue Ipanema Sand
2002 V8 Vogue Oslo Blue - Gone.

I think its something to do with this, taken from the RAVE, but it doesnt mean much to me??

"Crankcase Ventilation
The crankcase ventilation system is pressure regulated by a valve mounted at the rear of the inlet manifold. Vacuum
supply ports are incorporated on the valve for the power brake booster and the fuel pressure regulator
The pressure regulating vent valve varies the vacuum applied to the crankcase depending on engine load. The valve
is balanced between spring pressure and the amount of manifold vacuum. At idle when the vacuum is high, the valve
closes down and only allows a small amount of blow-by vapours to pass into the manifold. At part to full load
conditions, the spring opens the valve and additional blow-by gasses flow into the manifold. An additional tube leads
the blow-by gasses through the manifold and up to the mixing plate.
The crankcase ventilation system is completely sealed. Hose clamps are used at all connections to ensure that the
system does not contain any leaks.
The crankcase ventilation system uses a cyclone separator to purge the blow-by gasses of any oil vapours. The oil
vapours condense in the separator and drain back into the sump" MY2010 TDV8 Vogue Ipanema Sand
2002 V8 Vogue Oslo Blue - Gone.

How are the oil and water mixing ? are they supposed to? maybe they are ? it says something about oil condensing and returning to the sump. maybe the water is from the atmosphere and its supposed to be milky?? MY2010 TDV8 Vogue Ipanema Sand
2002 V8 Vogue Oslo Blue - Gone.

Hi Woody, if the car has done a lot of short journeys then that could be the "issue". If the engine does not warm up properly and for some time, moisture will form and it will mix with the oily vapours creating an emulsion of oil and water.

I have seen it a lot on older cars that did short trips years back. Since then I have only been working on cars that get a chance to warm up properly so not traces of the emulsion.

The other option is a small water leak that allows the emulsion to form. Have you checked the end of the oil dipstick ?? Any traces of emulsion/water on that ?? MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!

Hi there ebajema,

thanks for the swift reply.

the dipstick is clean as is the filler cap. no signs of emulsion there...

The reason I took off the coolant manifold in the first place was to try and fix a small leak i have. I think they had been leaking through the pipes that go into the cooolant manifold and run through the length of the engine.

The car has 145k miles on it and latley has been used for mainly trips < 10 miles.

I took off the left hand side crank cover breather hose and although oily and grimy, there was no sign of water in there. so it only seems to be between the seperator and the inlet manifold end cover. ?? MY2010 TDV8 Vogue Ipanema Sand
2002 V8 Vogue Oslo Blue - Gone.

If I can satisfy myself its nothing to worry about I wont bother taking off the inlet manifold. otherwise ill whip it off tommorrow and investgate further. really hope it is not head gasket or anything like that. I am erring on the "its normal side" as It seems to be fairly isolated in the areas mentioned above MY2010 TDV8 Vogue Ipanema Sand
2002 V8 Vogue Oslo Blue - Gone.

Have a look around the BMW forums. It may just be part of the function of the separator that creates the emulsion or there may be a simple solution. I'd say, a check of the inlet would not hurt (but bear in mind that you may need a new gasket when you take it off as the old ones get damaged easily. MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!

Yeah that's the trouble no new gasket to hand . Thanks ill check out the BMW forums as you say . Car is running fine at present to hopefully just normal. MY2010 TDV8 Vogue Ipanema Sand
2002 V8 Vogue Oslo Blue - Gone.

Wood
I would chill out! Taking the inlet manifold off is a ball ache but nothing to testing mechanically. Have a hunt through my old topics as I did a write up about it and stripping the inlet manifold. The mayo is probably from a blocked Cyclone. I replaced my PCV valve at the back of the plenum chamber. Look on RSW solutions website as storey did a video about how to change. The cyclone separates the oil from the vapour in the rocker covers. Oil will contain an amount of water which over time is probably what you have found.

Here's the thread with the pics
http://www.fullfatrr.com/forum/topic6714.html?highlight=inlet+pcv [img]http://www.fuelly.com/driver/rob2529/range-rover[img/]
04, 4.4V8, Vogue Oslo Blue with LPG.
"You can sleep in your car, BUT you can't race your house!!!!"

If something can't be fixed with a hammer....... You have yourself an electrical fault!

+1 ^ plus check out this is the WIKI:

http://www.fullfatrr.com/wiki/PCV_Hose_Repair

Rob and Gazellio,

Thanks very much for that info. I think it must be a blocked cyclone as described. I'll take it off and clean it out and replace pipes as needed.

do you know if its possible to visually inspect the PCV to see if its ok? or is it a case of just changing it out for peace of mind? MY2010 TDV8 Vogue Ipanema Sand
2002 V8 Vogue Oslo Blue - Gone.

There is a diaphragm inside which breaks down. Never bothered to attempt to strip it as it was only about £50 to replace and wouldn't know where to get parts from to overhaul. Just remember to get a new gasket when you change it. If you change the cyclone remember to change the 3 hoses not just the top 2. [img]http://www.fuelly.com/driver/rob2529/range-rover[img/]
04, 4.4V8, Vogue Oslo Blue with LPG.
"You can sleep in your car, BUT you can't race your house!!!!"

If something can't be fixed with a hammer....... You have yourself an electrical fault!