Yes that is correct 3/8" hose plugs, but you will want to install a catch can. We really need to put together a detailed FAQ for the Y34.UpStar wrote:5 star thread! Put a sticky on it.
Alright....so to be clear you added the 3/8" hose plugs to eliminate the oil consumption.
nice info and pic
mcrews wrote:Red,that's exactly where i put my catch can. I will probably get some longer vaccuum line and run it in the space nearer the battery.
I highly don't recomend doing this!Reds12t wrote:I mentioned that I stopped my oil consumption in my other thread, and was asked to do a quick write up on how I did it. But, first a quick back story. After buying my car, I signed up for Nicoclub to learn more about my 2003 M45. After reading all the stories about oil consumption and engine replacement, I worried that I may have made a mistake buying this car, I even considered selling it. Especially since it would puff blue smoke at start up.
However, after a few tests, I found the problem to be the valve cover vents, which are vented to a vacuum port right behind the throttle body. It sucks the oil right out of the valve covers and into the intake manifold, causing oil consumption and puffs of blue smoke at startup.
Notice mine are plugged with 3/8" hose plugs, while I have not had any issues with them being plugged, the plugs are temporary, I will be putting in a catch can or Air/Oil Separator. It did this well over a month ago, and have not had any oil consumption or blue smoke on start up!
If you have an M45, go do this now!
Modified by Reds12t at 1:19 PM 12/12/2009
My understanding is a little poor in this area, thank you for the clarification. I assumed that since the valve covers are still connected and vented through the PCV system that plugging the second vent on the valve covers would not be an issue. I have edited my original post with instructions to not plug the hose.ken in az wrote:
I highly don't recomend doing this!
The system is called PCV (Positive Crankcase Ventilation) for a reason. It is a vent for pressure. You plugged up only one side of the "vent" so now you have only one channel for the pressure to go through.
Reapeated use will lead to blown crankshaft oil seals and or oil leaks to any external source due to the inability for the crankcase to ventalate pressure.
Another reason is that the PCV system utilizes "metered" air that has already passed through the MAF sensor. What you've done now is created a potential for "un-metered" air to enter the airstream causing a potential lean condition.
I would get a catch can installed pronto if I were you.
Well I am late to the party with my post, and Double E yours is much more informative, the install looks clean We should get that post as a stickyY'all did see my thread on this already right?
I cleaned out a teaspoon today after 1000 miles with the seperator installed. I added back the internal medium device when I did as I was observing oil "crawling" up the intake side of the glass even while it was at idle.
My routine at start-up puff of smoke is gone these days....
Reds,you may be late but you are a great poster. Very few noobs come in so well versed!Reds12t wrote:
Well I am late to the party with my post, and Double E yours is much more informative, the install looks clean We should get that post as a sticky
Looks like a lot of oil in there! How many miles is that since it was empty? So I need the Jegs catch, two pieces of 3/8 inch rubber tube, 2 90 degree elbows for 3/8 inch tube. Anything else? I am going to order these parts.mcrews wrote:Red,that's exactly where i put my catch can:
I will probably get some longer vaccuum line and run it in the space nearer the battery
wiki wrote: Warning to all those who own this engine** All VK45de engine consume oil. The PCV-positive crank case ventilation passages in the valve covers are not designed correctly and flow too much, thus allowing large amounts of oil into the intake system. This will cause puffs of blue and white smoke after cold starts! In lack of attention this condition will cause low oil level, which in turn results in worn cylinder rings causing excessive blow-by gases. The engine will eventually develop low compression in the rear most cylinders first. To easily confirm this condition- remove the intake duct from the throttle chamber and open the throttle flap manually. Large amounts of oil residue will be seen, as well as oil pooling in the back of the intake manifold plenum... Nissan and Infiniti are not stepping up to the plate although this is a know issue. They are putting the blame on the customers lack of service. Record all service data and present your case to a dealer. Under proper service the engine will be replace under full warranty it the vehicle is within the time and mileage limit...
If you are mechanically savvy you can fix this problem. Remove the fresh air hose, and both pcv valve hoses. Install a second pcv valve inline with the factory one using acrylic hose. then install an inline moisture filter (like the ones used with automotive paint sprayers) inline on all three hose. The moisture filters will need to be replaced in combination with your yearly service. For disposable inline filters see any automotive paint or most parts stores.
However none of the engines that have been replaced showed signed of cylinder leakdown or lowered compression. Since Ken in AZ illustrated this people are finally starting to realize that replacing long block will do nothing if the oil is being sucked through the valve covers and intake manifold. Your information is slightly off in this case.qship96 wrote:A "catch can" does nothing to change oil burning due to oil getting past piston rings into combustion chamber- a common source of oil burning on the VK series motors due to low tension rings used to increase horsepower.
I think he might know a few more things than you do when it comes to working on automobiles. Just a hunch, but not just anyone get hired as a factory tech at an infiniti dealership.qship96 wrote:Yeah Steve, I thought I knew everything when I was 26 years old too........ even had 2 college degrees by then,and you?