BMW X5 CCV

[JCL]

Originally Posted by steelheader

The five has two parts and 6 hoses that should be changed every two years or so in cold climates one is the oil separator (that pic with the tape up JOB )and the back cover plate of the intake its a pcv valve .It gets weak or full of that yellowish gunk (it freezes)that was on the bottom of Your oil cap ?.You replace them and Your cold weather troubles with it should be gone . if any part of the system has a clog the whole thing will back up and put pressure on the vc gasket,or sends the oil in the intake down the motor then hydro locked motor .4.4 usually blow oil out the vc gaskets from what I can tell the 3.0 6cyl motors sucks the oil down the intake onto the pistons .

You are focusing on the symptoms, not the root cause. You can't just say replace your hoses and your troubles will be gone. Drive the vehicle as it was intended, ie get it hot regularly, and your troubles will be gone because the condensate won't build up. Don't do so, and the condensate will continue to form. Replace your hoses if you like, to deal with it, but make sure and go back and do it regularly because you haven't fixed the problem, just the symptom.

Both engines can pressurize the crankcase and blow oil out, or draw oil from the sump into the intake and risk a hydrolock. It doesn't depend on the engine model, it depends on whether in each instance the CCV freezes in the closed position (thus pressurizing the crankcase) or the open position (thus drawing engine oil into the intake due to vacuum.

[steelheader]

Show me a 4.4 that hydro locked on line or utube there all 6cyl, Dude did you see the pic of his os . The guy tried to tape it up with foil and tape. Has to be a fool ,and whats funny is people let him touch there 5 .That's a huge vacume leak to start off .Basically try to restore to new is what I was saying .While looking for a 4.4 hydro locked motor I found a range rover utube tech that says to change the pcv (back of the intake plate )every 7000 miles must see video for any x5 owner with a v8!!!!

[Sniffer]

Originally Posted by steelheader

Show me a 4.4 that hydro locked on line or utube there all 6cyl, Dude did you see the pic of his os . The guy tried to tape it up with foil and tape. Has to be a fool ,and whats funny is people let him touch there 5 .That's a huge vacume leak to start off .Basically try to restore to new is what I was saying .While looking for a 4.4 hydro locked motor I found a range rover utube tech that says to change the pcv (back of the intake plate )every 7000 miles must see video for any x5 owner with a v8!!!!

In the interests of accuracy I`m 99.99% sure that the foil (an attempt to stop it freezing I`m guessing) was placed there by the guy I bought it from - NOT by any of the mechanics who have subsequently worked on it

I should also add that the guy who first replaced the gaskets added a "blow off valve" type device that didnt work (obviously), most likely because it was installed at the rear of the engine with the output pointed downwards meaning that water (condensate) could collect there and freeze (Doh!)

I only discovered on friday as to how he had modified a vacuum line into the CCV too - he did tell me when I last picked it up that he had undertaken this modification and it should cure the problem

I dont fully understand what was going on but from memory I think there was a vacuum pipe blocked off and another drain pipe had been rerouted to somewhere it wasnt designed to go - my current mechanic said this was a bad idea as it created too much vacuum and was unnecessary so he intends to put it back to stock

[JCL]

Originally Posted by steelheader

Show me a 4.4 that hydro locked on line or utube there all 6cyl, Dude did you see the pic of his os . The guy tried to tape it up with foil and tape. Has to be a fool ,and whats funny is people let him touch there 5 .That's a huge vacume leak to start off .Basically try to restore to new is what I was saying .While looking for a 4.4 hydro locked motor I found a range rover utube tech that says to change the pcv (back of the intake plate )every 7000 miles must see video for any x5 owner with a v8!!!!

I don't consider YouTube a diagnostic aid. Not sure what this utube is that you speak of. Being able to google something doesn't make one a mechanic. Or a statistician, for that matter.

There, their, and they're are all different words. It is difficult to follow your posts.

But if you go back to the mechanical fundamentals, I suggest that understanding the failure mode and resolving that is more productive. I agree with restoring to factory design and condition. I don't agree that will resolve his problems forever, as you stated it would, unless he modifies his driving pattern, or alternatively, includes regular CCV servicing in his PM program.