1. Anyone who has ever had or has a problem with oil into the intake, have you taken off your rear valve cover and recognize an abnormal amount of oil still sitting on top of the valves? With my engine sitting over night I found a decent amount of oil in my rear and very little in the front valve train.

2. Anyone have a diagram of the oil supply and or return galleys? This would be very helpful in finding the best approach for disloging and picking up any debris.

With the oil sitting in that rear valve cover over night and not fully draining this leads me to believe that with the engine running there is even more oil up there and the pcv valve only has oil to suck up and barely any air. This could also be the cause of our slight smoke due to it getting sucked into the intake and into combustion as well as flooding the valve train and seeping past the valves right into combustion. I am not engine expert but I am so tired of emptying my oil catch and adding oil all the time. BTW this could also be why we get oil into spark plug number 5. This is probably the weakest seal on the rear head and with an excess of oil in the valve cover it finds a new home in the spark plug tube.

Someone please chime in with a little bit of assistance or even some reassurance that this sounds logical and I am making some type of sense. I have thought this may be the issue and I have searched forever for this issue in a vq35 and found nothing. I am gaining confidence now with reading the exact problem with different engines. I know turn to this wonderful forum for someone backing me on this and if this solves the issue maybe a few others can look into this and if the same fix solves the issue we may start loving this motor more again and maybe we can start yelling at nissan.

BTW I do have another thread that no one seemed to like so I am starting this one in hope to have people read and give some opinions.

 

I am topping off many quarts between oil changes, like 20. I'm just gonna swap motors. But interested in what people post

 

Thanks for the reply. That is a lot of oil. Hopefully something comes of this.

 

Your rear valve cover may be cracked. you won't see the crack on the outside. it cracks on the inside.

 

Sorry for not posting this but I have replaced both valve covers. This shouldnt cause a blockage in the oil return back to the oil pan unless the old one cracked and debris from this is what formed the clog. I doubt this is what caused the clog but who knows. I am thinking fallen rtv from the corners came off inside and maybe fell into the oil drain galley.

The flooded rear head has been an issue since before I changed the valve covers. The car had 127000 miles on it when I bought it and is close to 130000 now. I suspect sludge is my issue at this point. or an item blocking the drain.

 

ttt