so i have a rebuilt 350 thats bored.30 over and it has an oil leak its not coming from the back of intake its coming out from where the oil guage goes into the back of the block can you guys tell me whats wrong and take pictures of your engines because i think i have 2 pcv valves on my car which would cause to much pressure and push the oil out of that hole i need to see what the stock valve covers have like which side has the push in breather and stuff thanks alot

 

Wow. Had to read that one three times to figure out what you were asking. Punctuation goes a long way on this board.

The pcv on my 350 is on the drivers side. Breather is on the passenger side.

 

You say oil is coming out where the pressure sender installs? Is the brass fitting threaded in tight? Two PCV valves shouldn't cause excessive crankcase pressure.

 

i have replaced the brass piece for the guage 2 times and used teflon tape for all three i think that on my engine it has 2 sources pushing in air and no source to pull the air out which would cause this right ?

 

There is nothing "pushing in air" in the PCV system. The PCV valve is connected to manifold vacuum and draws crankcase gases from the port in the valve cover. At wide open throttle, when manifold pressure goes near atmostphere(low vacuum) the valve will close to prevent a backfire into the crankcase. At this point, the make up air line that should connect the passenger side valve cover to the intake air tube vents crankcase gases into the inlet air stream.

At worse case, if your engine has two PCV valves and no make up air, The PCV valve will open, even at with no vacuum, at the slightest pressure.

Your engine has another oil pressure port just to the driver's side of the oil guage tap. It should be plugged. Did the plug get left out? What kind of manifold end seals did you use? Are they the cork? You can't use those and not expect leaks. You need to use heavy duty black rtv such as The Right Stuff for the end seals.

 

its plugged up but i looked at the diagram and it says that from factory there is supposed to be a ccv valve on the passenger side from the factory

 

Hmm. Don't know that I've heard of a "ccv" valve before. Can't even guess at what ccv would mean. The passenger side doesn't get a valve. Just a make up air tube that inserts into the valve cover the same way the PCV(positive crankcase ventilation) valve does on the driver's side. The make up air tube provides fresh, filtered make up air to the engine as gases are drawn out through the PCV valve.

As I said before, when manifold pressure goes high due to wide throttle opening and high engine load, the PCV valve bobbit will fall, closing the valve to prevent backfire into the crankcase. At this point, gases are vented through the make up air tube into the inlet air stream. Every diagram of a domestic PCV system I've ever seen shows this same design.