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Discussion Starter #1
Pcv valve has 1/8" hole thru it,so PVC tube from v. Cover to carb is clear.
Problem is, when I blow thru pass side v cover tube, which should go thru
To crankcase, then to pcv valve, and I quit blowing , it pushes air back into my face. Is there a blockage somewhere?
 

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The PCV valve is essentially a checkvalve so air only goes through one way. Could it be you are blowing from the wrong direction of air flow?

This diagram shows air flow direction.

Roger
 

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Discussion Starter #3
I mentioned the PVC had no valve, only a 1/8" hole. This PVC is hollow,
That's why I could blow thru it. Seems like somewhere, something is
Plugged. I'm getting oil blow- by, it looks like, from the rear main seal.
The engine only has about 4 k miles. Appreciate all thoughts.
 

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I mentioned the PVC had no valve, only a 1/8" hole. This PVC is hollow,
That's why I could blow thru it. Seems like somewhere, something is
Plugged. I'm getting oil blow- by, it looks like, from the rear main seal.
The engine only has about 4 k miles. Appreciate all thoughts.
If you remove the PCV valve from the opposite side valve cover, then blow air into the vent tube, does the air pressure continue to back flow? :confused: If it does, you've got a problem. The oil drain holes in the one head/valve cover should create the air passage thru the crankcase and back to the opposite head/valve cover.
 

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I mentioned the PVC had no valve, only a 1/8" hole. This PVC is hollow,
That's why I could blow thru it. Seems like somewhere, something is
Plugged. I'm getting oil blow- by, it looks like, from the rear main seal.
The engine only has about 4 k miles. Appreciate all thoughts.
You said when you blow thru the passenger side vent tube it blows back ?

That should be an open hole allowing air to enter the engine. There should be no obstructions on the passenger side. That's where you probably have a problem if I understand what you are saying.
 

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Discussion Starter #6
I think you folks have hit the nail on the head. There has to be an
Obstruction under the valve covers. I agree, the air should pass thru
The crankcase to the opposite valve cover. First, I will try blowing
Thru with the pcv removed. If this don't work, I will pull both valve
Covers to determine problem. I will get back when I find answer.
First, car goes in tomorrow for a little paint work. Should have it
Back in a few weeks. Thanks for info.
 

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Discussion Starter #7
It's been awhile since I put an engine together, but question is:
Does oil go directly to pan from return holes in heads? Need to know
If I have to drill thru head gasket for drainage, where pieces would
Go? Or is there a better way without pulling heads?
 

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It's been awhile since I put an engine together, but question is:
Does oil go directly to pan from return holes in heads? Need to know
If I have to drill thru head gasket for drainage, where pieces would
Go? Or is there a better way without pulling heads?
Oil drainage isn't your problem. I suspect there is something blocking your passenger-side elbow that goes into your valve cover and connects to your air filter.
 

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Discussion Starter #9
Thanks Anne,
I will ck. that out when I get car back from paint shop. That has
To be answer as I can blow air to crankcase from drivers valve cover.
 

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Discussion Starter #10
Anne,
I will look into your sugg. As soon as the car comes back from paint jail.
 
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