PCV Valve Cleaning/Replacement
 

Anyone ever done anything to clean the PCV valves on their Disco's? Reading on the Atlantic British site that a fouled one is often the cause of the seeping on the V/C gaskets. I tried retightening them, but still get a bit of seepage.. (link to the Atlantic British Article http://www.roverparts.com/TechTips/pcv_tune_up.cfm)

Is this something that often fouls out? I have done the intake and manifold cleaning, etc., but didn't do the PCV valves... they look pretty tough to access with out removing a bunch of crap...

Here is what you do, remove the hose from the passenger valve cover to intake plenum and spray carb cleaner down it until it comes out clean.
Take a pair of needle nose pliers and remove the oil seperator from the valve cover and clean it with carb cleaner.
Reinstall everything and you are done.
Do this once a year.
If the hoses are to old/cracked/brittle/soft, whatever just go to any autoparts stroe and buy a piece of rubber tubing that same size and a little longer, cut to legnth and you are good to go.
I replaced my PCV hose with rubber gas line from a old lawnmower.
Been working great for almost 2.5 years now.

How many miles on your truck, what octane gas are you using, if cheap gas, yes the PCV can be plugged if good gas, chances are it isn't plugged.
How tight did you tighten the v/c bolts? When done, go power scrub the engine to get all the old oil of it, don't use soap or degrease just cold water and then watch to see if it is still leaking, if it is, you will then need a new set of v/c gaskets.

Where is the oil separator at? Any pics available?

the oil separator is in the passenger side valve cover, on the rear of the VC is a rubber hose remove the hose from the VC and you will see the separator sitting in the hole.

anyone ever put valve cover breathers on these things?

Is that cylinder type oil separator a one way valve? I soaked it in carb cleaner but can't blow through it in either direction. Just trying to figure out whether it's clogged and I need to replace it or not.

No, it is just a plastic spiral. you should be to remove it with a pair of needle nose pliers, twist it rather than try to pull it. Mine came out in pieces, I think new ones are under $10.

i think if you put valve cover breathers on you would lose the positive portion of the positive crankcase ventilation?

Plastic? I pulled it out of the VC. Mine is metal. Passenger side towards the rear of the VC right?