Question about Cars & Trucks
A positive crankcase valve ( PCV ) has nothing to do with oil pressure. It is for emmissions and removes blowby gases from the engine. What problem are you having?
Posted on Apr 11, 2015
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Posted on Jan 02, 2017
SOURCE: 2004 5.3 tahoe, Mobil 1
shouldn't be plugged if you use mobil 1 and have changed regularly. Do you actually see drips/runs anywhere? It could be the valve cover gaskets themselves. Your best bet is to get the factory service manual which will give you everything in detail that is what the dealer mechanics use
Let me know if you need any further assistance.
Posted on Jul 18, 2008
Did you put Valve seals in the head???
Other than that the PCV is a good start...
But it sounds like the oil rings on the pistons to me.
Posted on Apr 19, 2009
Before making any repairs I suggest you put an external mechanical oil pressure gauge in place of the sending unit and determine what your actual oil pressure is. That will tell you which way to go using real numbers. If this condition appeared suddenly it may not be a large problem, especially as you did not note any knocking etc that goes along with internal wear.
Posted on Jul 30, 2009
I have one of these cars too, also 3.5. I purchased with 34K and has used a quart of oil every 1000 miles since then. It has no leaks or smoke or any other signs of oil consumption. So much research, nobody knows why these engines do this, some have gone as far as contacting Chrysler just for them to say, " that's normal". But here is the diagram for the PCV:
Posted on Mar 13, 2010
I know the 65 didn't come with a 352, what is a 352? I thought it was a 351 windsor,? Anyway, did you rebuild the motor? There is a vent under neath the intake sheet metal that clogs up, It is held in the with a plate and rivets, you either have to remove the rivets or soak the whole thing in solvent. It will upset the car's pcv, a new pcv valve won't hurt, you don't need to be drilling holes, you might make it worse. Check all your vacuum lines. Make sure you have no leaks. Hope this helps.
Posted on Aug 16, 2010
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